Java editor

The JDT provides an editor that gives you specific support for editing Java code.

The editor is associated with the Java-specific Outline view, which shows the structure of the active Java compilation unit. It is updated as the user edits the compilation unit.

The Java editor can be opened on binary CLASS files. If a JAR file containing the CLASS files has a source attachment, then the editor shows the corresponding source.

The editor includes the following features:

• Syntax highlighting
• Content/code assist
• Code formatting
• Import assistance
• Integrated debugging features

The Java editor can be configured to either show an entire compilation unit or a single Java element only. To change the setting, use the toolbar button Show Source of Selected Element Only.

 

By default, this editor is activated by either:

• selecting Open With > Java Editor from a selection's pop-up menu in the Navigator view, Package Explorer view or Types view
• clicking a Java file in the Navigator or Package Explorer (see the  Window > Preferences > Workbench preference page to choose between single and double click modes)
• clicking a Java type, method or field in the Package Explorer view, Types view, Members view or Type Hierarchy view (see the  Window > Preferences > Workbench preference page to choose between single and double click modes)
• single-clicking a currently-open Java file in the Navigator view or Package Explorer view.
• single-clicking a Java type, method or field, with its compilation unit currently open, in  the Package Explorer view, Types view, Members view or Type Hierarchy view
• selecting Open from the pop-up menu of either a type or a method in the Type Hierarchy view, Members view, Types view or Package Explorer view.

Java development tools (JDT)

Adding required import statements
Evaluating expressions
Formatting Java code
Generating getters and setters
Launching a Java program
Opening an editor for a selected element
Using content/code assist
Using the Java editor
Viewing compilation errors and warnings
Viewing runtime exceptions

Java editor actions
Java editor preferences
Outline view for Java
Views and editors