Eclipse Java Development User Guide
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Java development user guide Tasks Using the Formatter Application

Generating a Config File for the Formatter Application

Generating a config file for the formatter application involves modifying the code formatter settings for a Java project and copying org.eclipse.jdt.core.prefs out of the .settings directory for that project.

Select a Java project, open the pop-up menu and choose Properties.
Select the Java Code Style > Formatter page and check Enable project specific settings.
Select or edit a profile as explained above.
Click OK when you are done.
Use either a file manager or the command line to copy workspace/YourJavaProject/.settings/org.eclipse.jdt.core.prefs to a new location.
If the files you want to format are using 1.5 constructs, you must add the following lines inside the preference file you just created:
org.eclipse.jdt.core.compiler.compliance=1.5 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5 org.eclipse.jdt.core.compiler.source=1.5

Related reference

Code formatter