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| <title>Eclipse Project 4.26 - New and Noteworthy</title> |
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| |
| <body> |
| <h2>Java development tools</h2> |
| <ul> |
| <li><a href="#Java19">Java 19 Support</a></li> |
| <li><a href="#JavaEditor">Java Editor</a></li> |
| </ul> |
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| |
| <!-- ******************* Java 19 Support ************************************* --> |
| <tr> |
| <td id="Java19" class="section" colspan="2"> |
| <h2>Java™ 19 Support </h2> |
| </td> |
| </tr> |
| <tr id="Java_19"> <!-- https://bugs.eclipse.org/bugs/show_bug.cgi?id=575752 --> |
| <td class="title">Java 19</td> |
| <td class="content"> |
| <a href="http://jdk.java.net/19/">Java 19</a> is out and Eclipse JDT supports Java 19 in 4.26. |
| <p></p> |
| <p> |
| The release notably includes the following Java 19 features: |
| <br/> |
| <a href="https://openjdk.java.net/jeps/405"> JEP 405: Record Patterns (Preview)</a>. |
| <br/> |
| <a href="https://openjdk.java.net/jeps/427"> JEP 427: Pattern Matching for Switch (Third Preview)</a>. |
| <br/> |
| <a href="https://openjdk.java.net/jeps/425"> JEP 425: Virtual Threads (Preview)</a>. |
| <br/> |
| <a href="https://openjdk.java.net/jeps/428"> JEP 428: Structured Concurrency (Incubator)</a>. |
| </p> |
| <p> |
| Please note that preview option should be on for <a href="http://openjdk.java.net/projects/jdk/19/"> preview language features</a>. |
| For an informal introduction of the support, |
| please refer to <a href="https://wiki.eclipse.org/Java19/Examples"> Java 19 Examples wiki</a>. |
| </p> |
| </td> |
| </tr> |
| <!-- ******************* End of Java 19 Support ************************************* --> |
| |
| <!-- ******************* Java Editor ************************************* --> |
| <tr> |
| <td id="JavaEditor" class="section" colspan="2"> |
| <h2>Java Editor </h2> |
| </td> |
| </tr> |
| |
| <tr id="new-class-assists"> <!-- https://github.com/eclipse-jdt/eclipse.jdt.ui/pull/295 --> |
| <td class="title"><a href="#new-class-assists">New assists for class</a></td> |
| <td class="content"> |
| Some existing actions found in the <b>Source</b> menu have been made available as quick assists for a class. These actions are: |
| <ol> |
| <li>Generate getters and setters</li> |
| <li>Generate hashCode()/equals() methods</li> |
| <li>Generate toString() method</li> |
| </ol> |
| <p>All three actions require that there at least be one field in the class and that the action is required: namely, that <code>getters/setters, |
| hashCode()/equals(), or toString()</code> methods do not already exist. Each action will bring up a dialog for the user to make additional |
| specifications (e.g. which fields to use). |
| </p> |
| <p>To use the quick assist, select a class and specify <b>CTRL+1</b>. |
| </p> |
| <p><img src="images/new-class-assists.png" alt="New Assists"/></p> |
| </td> |
| </tr> |
| |
| <tr id="smarter-extract-local"> <!-- https://github.com/eclipse-jdt/eclipse.jdt.ui/pull/66 --> |
| <td class="title"><a href="#smarter-extract-local">Improved 'Extract local variable'</a></td> |
| <td class="content"> |
| The extract local variable refactoring available from <b>Refactor > Extract Local Variable</b> has been improved to recognize |
| situations where adding the local variable may cause a NullPointerException as it precedes code used to check for null. In these cases, |
| the positioning of the local variable is altered so the null check occurs before the variable declaration. |
| <p>For example, in the following class, a call to the String length() method is made after verifying the String variable is not null.</p> |
| <p><img src="images/extract-local-var-before.png" alt="Before"/></p> |
| <p>If we select the <b>s.length()</b> call and choose to extract this to a local variable to replace all occurrences, the result is:</p> |
| <p><img src="images/extract-local-var-after.png" alt="Before"/></p> |
| <p>Note how the declaration is after the if statement to ensure that the check for null occurs first</p> |
| </td> |
| </tr> |
| <!-- ******************* End of Java Editor ************************************* --> |
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