Frequently Asked Questions for JDT.
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You may find your answer in one the following FAQ collection
The navigation bar is called the Breadcrumb, to disable the breadcrumb invoke Toggle Java Editor Breadcrumb in the toolbar or press Alt+Shift+B in the Java editor. More details on the Java editor breadcrumb can be found in Eclipse help.
Can I use JDT outside Eclipse to compile Java code?
Yes, the batch compiler can be invoked from command line or via the ant javac adapter. More details can be found in Java development user guide.
How can I disable auto-indentation in the Java editor?
You can disable smart insert mode (Edit > Smart Insert Mode), alternatively you can also configure the Smart Insert Mode (Windows > Preferences > Java > Editor > Typing).
Can I enable code completion to be activated as I type like how it works in Visual Studio?
Go to Preferences > Java > Editor > Content Assist and paste "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz." (note the dot after z) into the "Auto activation triggers for Java:" field.
Code completion inserts meaningless names for method parameters - arg0, arg1. What is the problem?
The argument names are fetched from the source or javadoc and if Eclipse cannot find them then it can only suggest arg0, arg1, etc. To solve the problem you can
- Use a JDK, the sources are bundled with a JDK but not with a JRE. (see also IRC FAQ )
- Another solution is to have the Javadoc installed locally. Eclipse can also fetch it from the web but this can timeout for slow connections in which case you get arg0, arg1, etc.
- You can also configure Eclipse to insert the best guessed names, see Windows > Preferences > Java > Editor > Content Assist, select 'Insert best guessed names'.
Other FAQ collection
You may find your answer in the Java Development Tool API section of The Official Eclipse FAQs.
Can I use JDT outside Eclipse to manipulate Java code?
JDT Core has no dependency on UI side, however it requires a runtime-workbench. Hence you can use it in an Eclipse headless application or include all the dependent jar files in the class path of your application. (You will have to use ASTParser.setSource() and ASTParser.setEnvironment() to be able to parse non Eclipse Java projects.)
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