Posts tagged with 'devstudio'

The Hibernate 5.4 runtime provider now incorporates Hibernate Core version 5.4.14.Final and Hibernate Tools version 5.4.14.Final.

The Hibernate 5.3 runtime provider now incorporates Hibernate Core version 5.3.16.Final and Hibernate Tools version 5.3.16.Final.

To better handle multi-module, nested and hierarchical projects, the default project layout in Project Explorer view has been changed from Flat to Hierarchical.

You can restore the layout to Flat using the view menu (⋮).

The interpretation of ASCII control characters in the Console View was extended to recognize the characters: \f - form feed and \v - vertical tab (in languages that support it).

This feature is disabled by default. You can enable it on the Run/Debug > Console preference page.

The Console View label will now show the termination time of a process in addition to the launch time.

A preference has been added in the General preferences page, that allows you to select the resource renaming mode in the Project Explorer: either open an inlined text field or a dialog. By default, the inline rename mode is selected.

The preference can also be specified via product customization:

When Eclipse is in dark theme, the welcome screen also appears dark on macOS and Linux.

Interactive performance has been further improved in this release.

To improve interactive performance, redraw is turned off by default during the collapse and expand operation of tree viewers. This significantly improves these operations compared to drawing the updates synchronously.

Java™ 14 is available and Eclipse JDT supports Java 14 for the Eclipse 4.15 release.

The release notably includes the following Java 14 features:

Please note that preview option should be on for preview language features. For an informal introduction of the support, please refer to Java 14 Examples wiki.

Content Assist now supports subword patterns, similar to Eclipse Code Recommenders and other IDEs. For example, completing on addmouselistener proposes results like addMouseMoveListener and addMouseWheelListener.

This feature can be enabled using the Show subword matches option on the Java > Editor > Content Assist preference page.

Content Assist will prioritize displaying constructor completions whose declaring type inherits from the expected return type within the completion context.

For example, completing on :

Queue<String> queue = new L

prioritizes constructors for LinkedBlockingQueue, LinkedBlockingDeQueue and LinkedList.

Code completion in the Java editor can now be run in a separate non-UI thread to prevent UI freezes in case of long computations. To enable this non-blocking computation, go to Preferences > Java > Editor > Content Assist > Advanced and check Do not block UI Thread while computing completion proposals preference. This option is currently disabled by default.

Non-blocking completion is useful when completion proposals are long to compute, as it allows you to type or use other parts of the IDE in the meantime.

Some completion participants may prevent this option from being effective (typically if the Java completion extension doesn’t declare requiresUIThread="false"), so the UI thread may still be used even if this option is set.

A quick fix has been added to wrap an Optional statement.

The options for a primitive statement are: Optional.empty() and Optional.of(). Type statements also have Optional.ofNullable().

Example for type objects:

Selecting Wrap with nullable Optional for type object results in:

Example for primitive:

Selecting Wrap with Optional for primitive results in:

A new clean up has been added that simplifies the lambda expression and the method reference syntax and is enabled only for Java 8 and higher.

The clean up removes parenthesis for a single untyped parameter, return statement for a single expression and brackets for a single statement. It replaces a lambda expression by a creation or a method reference when possible.

To select the clean up, invoke Source > Clean Up…​, use a custom profile, and on the Configure…​ dialog select Simplify lambda expression and method reference syntax on the Code Style tab.

For the given code:

You get this after the clean up:

Some map manipulations are unnecessarily verbose. The new cleanup option Operate on Maps directly calls methods on a map instead of calling the same methods on the key set or the values.

Beware! If you create Map implementations that don’t follow the Map specification, this cleanup may break the behavior (a size() method that changes the values, an iterator that destroys the items…​).

For the given code:

You get this after the clean up:

A new cleanup option Use uppercase for long literal suffix has been added. It will rewrite long literals like 101l with an uppercase L like 101L to avoid ambiguity.

Corresponding to the quick fix which will surround a selection with a "try-with-resources" block, a new action has been added to the Surround With menu.

For example, selecting the lines as shown:

and right-clicking and selecting Surround With → Try-with-resources Block

results in:

Quick fixes have been added to fix the missing and duplicate @provides and @uses Javadoc tags in a module-info file.

Almost 18 years ago, it was reported that completion for imports adds an unnecessary semicolon if one already exists (like when changing an existing import). Now this extra semicolon is no longer inserted.

When using null-annotations for advanced null analysis, it is inherently tricky to combine your code with "legacy" code that has no null annotations and has not been blessed by such analysis.

Previously, Eclipse would only warn you when you obtain a dubious value from a legacy API, but it would keep silent in the opposite case: passing a value of an annotated type into legacy API. Still in specific situations this can cause a NullPointerException to be thrown in your null-checked code:

The console shows an exception thrown from within your checked main method (see the class-level @NonNullByDefault). It also shows the new warning, which Eclipse raises to alert you of this danger.

Hint: The shown code assumes the list names to have type List<@NonNull String>, but the legacy method Legacy.printNames() succeeds to taint this list by inserting a null element. This goes unnoticed because that method views the list has having type List<String>, with no nullness constraint on the type argument.

By default this problem is raised at level info, but the severity can be configured in the compiler settings:

Resource leak analysis has been improved in several ways.

Most importantly, the analysis now consistently considers resources (=values of type AutoCloseable) which are acquired using a method call, where previously under some circumstances resource allocation got unnoticed if it was wrapped in a factory method, like in the following example:

Second, resource leak analysis now leverages knowledge about well-known resource classes that support fluent programming, i.e., instance methods which return this to enable chains of method calls. Where a naive analysis could consider the method result as a new resource coming into scope, special knowledge about these classes informs the analysis that it is one and the same resource. This concerns the following system classes:

The following example is now understood to be safe, because analysis understands that the resource returned by append() is the same as the initial pw:

Generally, resource leak analysis was made more precise regarding several specific situations.

The Java formatter application will provide a sensible error message if a workspace is required but not provided (-data command line option). This also enables the -help option to be run on the formatter without a workspace specified.

A new bundle services the org.eclipse.jdt.core.JavaCodeFormatter application. This new bundle is part of the JDT feature. Users who are not using the JDT feature to define their set of bundles will need to add org.eclipse.jdt.core.formatterapp to their set of bundles.

Lambda expressions and method references are now supported in debug expressions, such as in the Expressions view and in breakpoint condition expressions.

The entry point of the org.eclipse.jdt.core.JavaCodeFormatter application has been moved to a new bundle, org.eclipse.jdt.core.formatterapp.

If you opened a brand new workspace, you should see the OpenShift Application Explorer view in the list of views available on the botton part of the screen:

If you don’t see the view being listed, you can open it through the Window -→ Show View -→ Other menu, enter open in the filter text box and then select OpenShift Application Explorer:

Expanding the root node will display the list of projects available on the cluster:

We will show how to deploy a Java based microservice and how to use the various features. But we first need to load the component source code in our workspace. Thanks to the launcher wizard, we can do that easilly. Try Ctrl+N and select the Launcher project wizard:

Then click the Next button:

Select rest-http in the Mission field, vert.x community in the Runtime field, myservice in the Project name field:

Then click the Finish button: a new project will be added to your workspace. Once the dependencies resolution has been completed, we’re ready to start playing with the cluster.

The Hibernate 5.4 runtime provider now incorporates Hibernate Core version 5.4.12.Final and Hibernate Tools version 5.4.12.Final.

The Hibernate 5.3 runtime provider now incorporates Hibernate Core version 5.3.15.Final and Hibernate Tools version 5.3.15.Final.

The view menu chevron icon (▽) is replaced by a modern equivalent, the vertical ellipsis ( ⠇).

Almost every view has a menu that may contain additional configuration settings like filters, layout settings, and so on. The view menu was often overlooked and we expect that this change will help users to find it.

The formerly called Quick Access action has been retitled to Find Actions to better emphasize its goal.

The related UI has changed a bit to improve its usage and accessibility:

These changes will greatly improve the experience if you’re using a screen reader as it relies on a more standardized focus state. This also leverages all the default and usual accessibility features of dialogs (moveable, resizable…​).

Loading the proposals has been improved as well to avoid UI freezes when loading proposals.

Find Actions is now extended by the Quick Text Search feature to show the potential text matches in file contents also in the proposals.

If the Quick Text Search bundle wasn’t started yet, you may miss those matches. In this case, you can use Find Actions itself to activate the Quick Text Search by finding and selecting the Activate bundle for 'File content' proposals entry.

Find Actions can now list matching file names from the workspace (similar to the Open Resource dialog). Upon selection the file is opened in the editor.

In the Project Explorer, renaming (with the F2 shortcut or Rename context menu) will start an inline rename for normal resources when other files aren’t affected by the rename.

In cases where other files are affected by the rename, or the rename operation is customized, the rename dialog will appear as it previously did.

You can now see the errors, warnings, and info markers inline in most of the text editors. No more mousing around to see the actual error message!

You can see the available quick fixes by clicking on the message.

You can enable it on the General > Editors > Text Editors preference page and set Show Code Minings for Annotations to:

If you use the Insert spaces for tabs option, now you can also change the backspace and delete keys behavior to remove multiple spaces at once, as if they were a tab.

The new setting is called Remove multiple spaces on backspace/delete and is found on the General > Editors > Text Editors preference page.

In the Debug View, now you can now use the new Collapse All button to collapse all the launches.

Before collapsing:

After collapsing:

The Console View can now interpret the control characters backslash (\b) and carriage return (\r).

This feature is disabled by default. You can enable it on the Run/Debug > Console preference page.

CSS customization of ExpandableComposite and Section was reworked to give you more control over their styling. In dark mode, those elements now integrate better with other Form elements.

Old:

New:

The special styling of the Perspective switcher has been removed to make the Toolbar look consistent. This also reduces OS specific styling issues with the perspective switcher.

Old:

New:

The usage of different shades of gray in the dark theme was reduced.

The styling of the widgets is also not based on the selected view anymore, which makes the UI more consistent.

Eclipse has adopted Ant version 1.10.7.

The Ant include task (available in the Ant library since 1.8.0) is now fully recognized by the ant-ui-plugin and validated accordingly.

Java™ 13 is available and Eclipse JDT supports Java 13 for the Eclipse 4.14 release.

The release notably includes the following Java 13 features:

Please note that these are preview language feature and hence enable preview option should be on. For an informal introduction of the support, please refer to Java 13 Examples wiki.

A keyboard shortcut Ctrl + Shift + ' is added in the Java Editor for text blocks, which is a preview feature added in Java 13.

Conditions under which this keyboard shortcut works are:

Examples:

Pressing the shortcut gives:

You can also encompass a selected text in text block as below:

On pressing the shortcut, you get this:

A new cleanup action Remove unnecessary array creation has been added. It will remove explicit array creation for varargs parameters.

For the given code:

After cleanup, you get this:

A new Java cleanup/save action Push down negation has been added. It reduces the double negation by reverting the arithmetic expressions.

For instance:

!!isValid; becomes isValid;

!(a != b); becomes (a == b);

When dealing with empty Java source files, some basic templates (class, interface, enum) will now be available from the content assist popup.

Postfix completion allows certain kinds of language constructs to be applied to the previously entered text.

For example: Entering "input text".var and selecting the var - Creates a new variable proposal, will result in String name = "input text".

A quickfix has been added to create a try-with-resources statement based on the selected lines. Lines that are selected must start with declarations of objects that implement AutoCloseable. These declarations are added as the resources of the try-with-resources statement.

If there are selected statements that are not eligible resources (such as Objects that don’t implement AutoCloseable), then the first such statement and all the following selected statements will be placed in the try-with-resources body.

Method before applying try-with-resources:

Select all the lines inside the method, then use the short-cut Ctrl+1 and click on Surround with try-with-resources from the list:

This results in:

Support has been added to check the Javadoc of a module-info.java file to report missing and duplicate @uses and @provides tags depending on the compiler settings (Preferences > Java > Compiler > Javadoc).

The code formatter can now handle text blocks, which is a preview feature added in Java 13. It’s controlled by the Text block indentation setting, found right in the Indentation section of the Profile Editor (Preferences > Java > Code Style > Formatter > Edit…​).

By default, text block lines are indented the same way as wrapped code lines, that is with two extra tabs relative to the starting indentation (or whatever is set as Default indentation for wrapped lines in the Line Wrapping section). You can also set it to use only one tab for indentation (Indent by one), align all lines to the position of the opening quotes (Indent on column), or preserve the original formatting (Do not touch).

The code formatter can now divide Javadoc tags into groups (by type, for example @param, @throws, @returns) and separate these groups with blank lines. This feature can be turned on in the Comments > Javadocs section by checking the Blank lines between tags of different type box.

A new setting has been added to control whether a space should be added after not (!) operator, independently from other unary operators. To find it, expand sections Whitespace > Expressions > Unary operators and go to the last checkbox.

The Bundle Required Execution Environment (BREE) for the org.eclipse.jdt.junit.runtime bundle is now J2SE-1.5.

A new workspace preference has been added for exception breakpoints: Suspend policy for recurring exception instances controls whether the same exception instance may cause the debugger to suspend more than once.

This option is relevant when debugging an application that has try blocks at several levels of the architecture. In this situation an exception breakpoint may fire multiple times for the same actual exception instance: A throw statement inside a catch block may re-throw the same exception. The same holds for each finally block or try-with-resources block.

When the debugger stops due to an exception breakpoint, you may want to continue your debug session by pressing Resume (F8), but all that catching and re-throwing will force you to observe all locations where the same exception will surface again and again. Suspending at all try blocks on the call stack may also spoil your context of open Java editors, by opening more editors of classes that are likely irrelevant for the debugging task at hand.

The JDT Debugger will now detect this situation, and the first time it notices the same exception instance recurring at the surface, a new question dialog is shown:

If you select Skip in this dialog, the current exception instance will be dismissed for good. Still, new instances of the same exception type will cause suspending when they are thrown.

If you check Remember my decision your choice will be stored in the mentioned workspace preference to be effective for all exception breakpoints.

Even after choosing Skip — resp. Only once in the preferences — you can have the old behavior simply by pressing Step Return (F7) instead of Resume.

The existing org.eclipse.jdt.ui.javaCompletionProposalComputer, org.eclipse.jdt.ui.javadocCompletionProposalComputer and org.eclipse.jdt.ui.javaCompletionProposalSorters extension points now allow a new attribute requiresUIThread that allows a developer to declare whether running in the UI thread is required or not.

This information will be used by the Content Assist operation to allow some optimizations and prevent UI freezes by reducing the amount of work happening in the UI thread.

To preserve backward compatibility, the default value for this attribute (if unset) is true, meaning the extension is expected to run in the UI thread.

A new wizard has been added to create a new Quarkus application project in your workspace. In order to launch it, first enter Ctrl+N to get the list of available wizards

In the filter text box, enter the qu characters to filter the list of wizards:

Select the Quarkus Project wizard and click the Next button:

The Project type combo allows you to choose between Maven or Gradle tool used to manage your project. We’ll go with Maven for this tutorial.

Enter a project name (we will use code-with-quarkus) and click the Next button:

This dialog allows you to choose various parameters for you project, like the project coordinates (group id, artifact id and version) along with the base REST endpoint information. We’ll use the default so click on the Next button:

This dialog allows to select which Quarkus extensions you want to add to your project. The extensions are grouped by categories, so first select a specific category in the left table. We will choose the Web one:

You should have noticed that the middle table has been updated. In order to add an extension, double click on the extension in the middle table. We will add RESTEasy JAX-RS and RESTEasy Qute (a templating engine):

You should have noticed that the extensions that you double clicked on are now being added to the right table. If you want to remove an extension from the list of selected ones, double click again either in the center table or in the right table.

We are now all set so click on the Finish button to launch the project creation. The project creation job is then launched, dependencies are being retrieved and after a while, the new project will appear in the Project Explorer window:

We have successfully created our first Quarkus project. Let’s see now how we can launch this application and debug it.

Running a Quarkus application can be done from the workbench Run configurations. Select the Run → Run Configurations…​ menu to display the dialog allowing to create a Run configuration.

Scrool down until the Quarkus Launch Configuration is visible and select it:

Click on the New configuration button (top left):

A workspace project needs to be associated with the configuration so click on the Browse button to see the project selection dialog:

As the workspace contains a single project, it is automatically selected and we can click on the OK button:

The configuration is not ready to be used. So let’s start our Quarkus application by clicking on the Run button:

You should see a new Console being displayed.

The application is being built and after a while, it will be started:

Debugging a Quarkus application is just a simple as launching the previous configuration we’ve just created in Debug. You just need to open the Run → Debug Configurations…​. menu and click on the Debug button.

It will start the Quarkus application like in the previous paragraph but also connect a remote JVM debug configuration to your running Quarkus application. So if you have set breakpoints in your application source files, the execution will automatically stops there.

Every Quarkus application is configured through a configuration called application.properties.

The content of this configuration file is dependent of the set of Quarkus extensions that your application is using. Some settings are mandatory, some others are not and the possible values are specific to the nature of the setting: boolean, integer, limited set of values (enumerations).

So, as a developer, you need to look at various guides and documentations (the core Quarkus and the extension specific ones)

So Quarkus Tools provides content assist on those specific files that:

Let’s see it in action.

Go to src/main/resources/application.properties in the project and right click and select Open With → Generic Text Editor:

Go the third line of the file and invoke code completion (Ctrl + Space):

For each setting, a documentation is displayed when you mouse over the setting. Let try to add quarkus.http.port to the file and mouse over this name:

If we enter a wrong value (false instead of a numeric value), then the error will be highlighted:

This is the first set of features that will be integration into the next version of JBoss Tools. We encourage you to used it and if you are missing features and/or enhancements, don’t hesitate to report them here: JBoss Tools issue tracker

Enjoy!

Jeff Maury

The Hibernate 5.4 runtime provider now incorporates Hibernate Core version 5.4.7.Final and Hibernate Tools version 5.4.7.Final.

The Hibernate 5.3 runtime provider now incorporates Hibernate Core version 5.3.13.Final and Hibernate Tools version 5.3.13.Final.

The new Quick Search dialog provides a convenient, simple and fast way to run a textual search across your workspace and jump to matches in your code. The dialog provides a quick overview showing matching lines of text at a glance. It updates as quickly as you can type and allows for quick navigation using only the keyboard. A typical workflow starts by pressing the keyboard shortcut Ctrl+Alt+Shift+L (or Cmd+Alt+Shift+L on Mac). Typing a few letters updates the search result as you type. Use Up-Down arrow keys to select a match, then hit Enter to open it in an editor.

You can now save the active editor even when the Project Explorer has focus. In cases where an extension contributes Saveables to the Project Explorer, the extension is honored and the save action on the Project Explorer will save the provided saveable item instead of the active editor.

The Show In context menu is now available for an element inside a resource project on the Project Explorer.

In simple cases such as a 2-way comparison or a 3-way comparison with no merges and conflicts, the Compare Viewer now shows different colors, depending on whether text has been added, removed or modified. The default colors are green, red and black respectively.

The colors can be customized through usual theme customization approaches, including using related entries in the Colors and Fonts preference page.

The status line for Text Editors now shows the cursor position, and when the editor has something selected, shows the number of characters in the selection as well. This also works in the block selection mode.

These two new additions to the status line can be disabled via the General > Editors > Text Editors preference page.

Several dialog texts have been shortened. This allows you to capture the important information faster.

Previously

Now

In the Project Explorer, you can now close a project using middle-click.

In the Environment Tab of the Launch Configuration dialog, you can now double-click on an environment variable name or value and start editing it directly from the table.

Right-clicking on the environment variable table now opens a context menu, allowing for quick addition, removal, copying, and pasting of environment variables.

The External Tools Configuration dialog for launching an external program now supports the Show Command Line button.

The preference to close editors automatically is now enabled by default. It will be triggered when you have opened 99 files. If you continue to open editors, old editors will be closed to protect you from performance problems. You can modify this setting in the Preferences dialog via the General > Editors > Close editors automatically preference.

You can now see all the colors currently being used in Text Editors from the Appearance color options table, located in the Preferences > General > Editors > Text Editor page.

The Eclipse SDK has been configured to show stack traces for UI freezes in the Error Log view by default for new workspaces. You can use this information to identify and report slow parts of the Eclipse IDE.

You can disable the monitoring or tweak its settings via the options in the General > UI Responsiveness Monitoring preference page as shown below.

On Linux and Mac, Eclipse can now start automatically in dark theme when the OS theme is dark. This works by default, that is on a new workspace or when the user has not explicitly set or changed the theme in Eclipse.

More and more operating systems provide a system wide dark theme. Eclipse now respects this system wide theme setting when the Eclipse help content is displayed in an external browser. A prerequisite for this is a browser that supports the prefers-color-scheme CSS media query.

As of writing this the following browser versions support it:

The Help System as well as the help content of the Eclipse Platform, the Java Development Tooling and the Plug-in Development Environment now use high resolution icons. They are now crisp on high resolution displays and also looks much better in the dark theme.

Labels, Sections, Checkboxes, Radio Buttons, FormTexts and Sashes on forms now use the correct background color in the dark mode on windows.

Interactive performance has been further improved in this release and several UI freezes have been fixed.

For presentations, screen casts and learning purposes, it is very helpful to show the corresponding key binding when a command is invoked. When the command is invoked (via a key binding or menu interaction) the key binding, the command’s name and description are shown on the screen.

You can activate this in the Preferences dialog via the Show key binding when command is invoked check box on the General > Keys preference page. To toggle this setting quickly the command 'Toggle Whether to Show Key Binding' can be used (e.g. via the quick access).

Java 13 is out and Eclipse JDT supports Java 13 for 4.13 via Marketplace.

The release notably includes the following Java 13 features:

Please note that these are preview language feature and hence enable preview option should be on. For an informal introduction of the support, please refer to Java 13 Examples wiki.

The Eclipse Console view currently can not ensure that mixed standard and error output is shown in the same order as it is produced by the running process. For Java applications the launch configuration Common Tab now provides an option to merge standard and error output. This ensures that standard and error output is shown in the same order it was produced but at the same time disables the individual coloring of error output.

The Java quickfix/cleanup Convert to enhanced 'for' loop is now offered on for loops that are iterating through Collections. The loop must reference the size method as part of the condition and if accessing elements in the body, must use the get method. All other Collection methods other than isEmpty invalidate the quickfix being offered.

A Java quickfix is now offered to initialize an uninitialized final field in the class constructor. The fix will initialize a String to the empty string, a numeric base type to 0, and for class fields it initializes them using their default constructor if available or null if no default constructor exists.

Use Autoboxing and Unboxing when possible. These features are enabled only for Java 5 and higher.

Remove redundant modifier now also removes useless abstract modifier on the interfaces.

For the given code:

You get this:

Adding a Javadoc comment to a Java module (module-info.java) will result in automatic annotations being added per the new module comment preferences.

The $(tags) directive will add @uses and @provides tags for all uses and provides module statements.

Code assist for "Chain Template Proposals" will be available. These will traverse reachable local variables, fields, and methods, to produce a chain whose return type is compatible with the expected type in a particular context.

The preference to enable the feature can be found in the Advanced sub-menu of the Content Assist menu group (Preferences > Java > Editor > Content Assist > Advanced) .

All the settings in the Blank lines section can now be configured to remove excess blank lines, effectively taking precedence over the Number of empty lines to preserve setting. Each setting has its own button to turn the feature on, right next to its number control. The button is enabled only if the selected number of lines is smaller than the Number of empty lines to preserve, because otherwise any excess lines are removed anyway.

There’s quite a lot of changes in the Blank lines section of the formatter profile.

Some of the existing subsections and settings are now phrased differently to better express their function:

More importantly, a few new settings have been added to support more places where the number of empty lines can be controlled:

Most of the new settings have been put in a new subsection Blank lines within method/constructor declarations.

JUnit 5.5.1 is here and Eclipse JDT has been updated to use this version.

The Java Launch Configuration now supports patching of different modules by different sources during the launch. This can be verified in the Override Dependencies…​ dialog in the Dependencies tab in a Java Launch Configuration.

Manually changing the settings file .settings/org.eclipse.jdt.core.prefs of a project will result in a full project build, if the workspace auto-build is on. For example, pulling different settings from a git repository or generating the settings with a tool will now trigger a build. Note that this includes timestamp changes, even if actual settings file contents were not changed.

For the 4.13 release, it is possible to disable this new behavior with the VM property: -Dorg.eclipse.disableAutoBuildOnSettingsChange=true. It is planned to remove this VM property in a future release.

You can import a project into Eclipse by passing its path as a parameter to the launcher. The command would look like eclipse /path/to/project on Linux and Windows, or open Eclipse.app -a /path/to/project on macOS.

From the Quick Access proposals (accessible with Ctrl+3 shortcut) you can now directly launch any of the Run or Debug configurations available in your workspace.

The icon used for the view menu has been improved. It is now crisp on high resolution displays and also looks much better in the dark theme.

Compare the old version at the top and the new version at the bottom:

On Mac, images and text are now drawn in high resolution during GC operations. You can see crisp images on high resolution displays in the editor rulers, forms, etc in Eclipse.

Compare the old version at the top and the new version at the bottom:

In dark theme on Mac, the Table and Trees in Eclipse now show the alternating dark lines in the background when setLinesVisible(true) is set. Earlier they had a gray background even if line visibility was true.

Example of a Tree and Table in Eclipse with alternating dark lines in the background:

A quick fix Change project compliance and JRE to 12 is provided to change the current project to be compatible with Java 12.

Preview features in Java 12 can be enabled using Preferences > Java > Compiler > Enable preview features option. The problem severity of these preview features can be configured using the Preview features with severity level option.

A quick fix Configure problem severity is provided to update the problem severity of preview features in Java 12.

A quick fix Add 'default' case is provided to add default case to a enhanced switch statement in Java 12.

A quick fix Add missing case statements is provided for a enhanced switch statement in Java 12.

A quick fix Add 'default' case is provided to add default case to a switch expression.

A quick fix Add missing case statements is provided for switch expressions.

As Java 12 introduced some new features into the switch construct, the formatter profile has some new settings for it. The settings allow you to control spaces around the arrow operator (separately for case and default) and around commas in a multi-value case.

The settings can be found in the Profile Editor (Preferences > Java > Code Style > Formatter > Edit…​) under the White space > Control statements > 'switch' subsection.

As Java 12 introduced the ability to group multiple switch case labels into a single case expression, a quick assist is provided that allows these grouped labels to be split into separate case statements.

In the Java > Editor > Code Mining preferences, you can now enable the Show parameter names option. This will show the parameter names as code minings in method or constructor calls, for cases where the resolution may not be obvious for a human reader.

For example, the code mining will be shown if the argument name in the method call is not an exact match of the parameter name or if the argument name doesn’t contain the parameter name as a substring.

In the Java > Editor > Code Mining preferences, selecting Show implementations with the Show References (including implementations) for → Methods option now shows implementations of methods.

Clicking on method implementations brings up the Search view that shows all implementations of the method in sub-types.

When the Java > Editor > Code Mining preferences are enabled and a single implementation or reference is shown, moving the cursor over the annotation and using Ctrl+Click will open the editor and display the single implementation or reference.

Appropriate quick fixes are offered when a service defined in a module-info.java file has a service provider implementation whose no-arg constructor is not visible, or is non-existent.

The Java Editor now offers new templates for the creation of switch labeled statements and switch expressions. On a switch statement, three new templates: switch labeled statement, switch case expression and switch labeled expression are available as shown below. These new templates are available on Java projects having compliance level of Java 12 or above.

If switch is being used as an expression, then only switch case expression and switch labeled expression templates are available as shown below:

An option is now available to enable/disable the comment generation while creating module-info.java or package-info.java.

The quick assist for creating getter and setter methods from fields no longer forces you to create both.

A quick fix to open all required closed projects is now available in the Problems view.

The Java Build Path configuration now has a new tab Module Dependencies, which will gradually replace the options previously hidden behind the Is Modular node on other tabs of this dialog. The new tab provides an intuitive way for configuring all those module-related options for which Java 9 had introduced new command line options like --limit-modules etc.

The dialog focuses on how to build one Java Project, here "org.greetings".

Below this focus module, the left hand pane shows all modules that participate in the build, where decorations A and S mark automatic modules and system modules, respectively. The extent of system modules (from JRE) can be modified with the Add System Module…​ and Remove buttons (corresponds to --add-modules and --limit-modules).

When a module is selected in the left hand pane, the right hand pane allows to configure the following properties for this module:

Read Module:

Select additional modules that should be accessible from the selected module (corresponds to --add-reads)

Expose Package:

Select additional packages to be exposed ("exports" or "opens") from the selected module (corresponds to --add-exports or --add-opens)

Patch with:

Add more packages and classes to the selected module (corresponds to --patch-module)

Eclipse 4.7 introduced a new experimental Java index which was disabled by default.

Due to lack of resources to properly support all Java 9+ language changes, this index is not available anymore starting with Eclipse 4.12.

The preference to enable it in Preferences > Java is removed and the old index will be always used.

A new shortcut, Ctrl+Alt+Click, has been added to the annotation ruler that will invoke the 'Run to Line' command and take the program execution to the line of invocation.

Content assist (Ctrl+Space) support is now available in the Debug Shell.

The Java Stack Trace Console shows a usage hint when opened the first time. This message is now automatically removed when the user starts typing or pasting a stack trace.

The Lambda variable names are now shown in the Variables view while debugging projects in the workspace.

The following Javadoc tags are now supported by the compiler and auto-complete.

Tags introduced in JDK 8:

@apiNote

@implSpec

@implNote

Tags introduced in JDK 9:

@index

@hidden

@provides

@uses

Tags introduced in JDK 10:

@summary

See the BPMN2 1.5.1.Final Known Issues Section of the Integration Stack 12.11.0.GA release notes.

See the Drools 7.21.0.Final Known Issues Section of the Integration Stack 12.11.0.GA release notes.

The Filters and Customization…​ menu in Project Explorer now shows an additional User filters tab which can be used to exclude some resources from Project Explorer based on their name.

Full name and regular expressions are supported.

The Error Log view has been moved from the PDE project to the Platform project. See bug 50517 for details.

A copy to clipboard action has been added to all tabs of the Installation Details dialog.

The Environment tab in a Launch configuration dialog supports copy & paste actions now. The environment variables are transferred as text data, so it is not only possible to copy & paste between two different launch configurations, but also between the launch configuration and e.g. some text editor or the command line.

This feature is available in all launch configurations which use the common Environment tab.

When Eclipse IDE is started for the first time or with a new workspace, it may not be intuitive for new users on how to proceed. To help the users in getting started, the following useful links have been provided to add a project to the workspace:

New mnemonics have been added for Export Entry…​ and Event Detail entries in the context menu of Error Log view.

The Dark theme for Mac has been improved to use the colors from the macOS system dark appearance. Some of the notable changes in Eclipse IDE are the dark window title bar, menus, file dialogs, combos and buttons.

Note: This change is available on macOS Mojave and later.

Before:

After:

The drawing operations have been improved in Windows so the custom drawn icons look better now. For example, check the close icon below.

Before:

After:

The startup and interactive performance of multiple operations has been improved again in this release.

Java 12 is out and Eclipse JDT supports Java 12 for 4.11 via Marketplace. The release notably includes the following Java 12 feature: JEP 325: Switch Expressions (Preview). Please note that this is a preview language feature and hence enable preview option should be on. For an informal introduction of the support, please refer to Java 12 Examples wiki.

JUnit 5.4 is here and Eclipse JDT has been updated to use this version.

JUnit Jupiter now allows test factory methods to return a single DynamicNode. The test_factory template has been updated to include DynamicNode in the return type.

The additional information pop-up of a content assist proposal now shows the default value of an annotation type element:

and the value of a constant:

If a service defined in a module-info.java file has an invalid service provider implementation, a Quick Fix (Ctrl + 1) is now available to create the new provider method:

Instead of a single line wrapping setting for binary expressions, there’s now a whole section of settings for various kinds of binary operators (multiplicative, additive, logical, etc.). There are settings for relational (including equality) and shift operators, which were not covered by the old setting. Also, string concatenation can now be treated differently from arithmetic sum.

The settings can be found in the Profile Editor (Preferences > Java > Code Style > Formatter > Edit…​) under the Line Wrapping > Wrapping settings > Binary expressions subsection.

The white space around operators in binary expressions can now be controlled separately for different groups of operators, consistent with the line wrapping settings.

The new Binary operators sub-section has been added under White Space > Expressions in the Formatter profile editor.

A chain of nested conditional expressions (using ternary operator) can be now wrapped as a single group, with all of them indented at the same level. It’s only possible for right-sided nesting.

Find the Chained conditionals setting in the Profile Editor under the Line Wrapping > Wrapping settings > Other expressions subsection.

The Formatter Profile has a new setting that indents wrapped Javadoc tag descriptions. It’s called Indent other tag descriptions when wrapped, in contrast to the preexisting Indent wrapped @param/@throws descriptions setting. It affects tags like @return or @deprecated.

The settings can be found in the Profile Editor (Preferences > Java > Code Style > Formatter > Edit…​) under the Comments > Javadocs section.

The Variables view now stores a history of the expressions used in the Detail pane. You can choose a previously entered expression for a variable from the new drop-down menu. The expression will be copied to the Detail pane where you can select it to perform various actions present in the context menu.