When editing Java files, Source Insight can perform symbol completion for the standard Java runtime libraries. This is accomplished by importing symbols from the Java jar files on your machine.
To import the Java runtime symbols, use the Project > Import External Symbols command, or use the Preferences: Symbol Lookups dialog box and click the Import Symbols button.
To import Java runtime symbols:
1.In the Options > Preferences: Symbol Lookups dialog box, click the Import Symbols button.
2.In the Import External Symbols dialog box, click on the Add... button. Click next on Import a Java jar file. Navigate to the jar file that contains the runtime library. This is typically in a location like C:\Program Files (x86)\Java\jre6\lib\rt.jar. Select the jar file and click Open.
3.The jar file will be scanned and symbol declarations will be extracted into a special project called an import library. This may take a few minutes since the jar file is large.
Now, auto-complete should work for the packages that have been imported into the Java source file using the import statement.