import org.eclipse.debug.core.sourcelookup.ISourcePathComputer; //导入依赖的package包/类
@Override
public ISourcePathComputer getSourcePathComputer() {
	ISourcePathComputer sourcePathComputer = super.getSourcePathComputer();
	if(sourcePathComputer != null) {
		return sourcePathComputer;
	}
	
	return new ISourcePathComputer() {
		
		LangSourcePathComputer langSourcePathComputer = new LangSourcePathComputer();
		
		@Override
		public ISourceContainer[] computeSourceContainers(ILaunchConfiguration configuration, IProgressMonitor monitor)
				throws CoreException {
			return langSourcePathComputer.computeSourceContainers(configuration, monitor);
		}
		
		@Override
		public String getId() {
			return LangDebug.LANG_SOURCE_LOOKUP_DIRECTOR;
		}
	};
}
 

import org.eclipse.debug.core.sourcelookup.ISourcePathComputer; //导入依赖的package包/类
protected void setSourceLocator(ILaunch launch) throws CoreException {
	ILaunchConfiguration configuration = launch.getLaunchConfiguration();
	if (configuration != null && launch.getSourceLocator() == null) {
		ISourceLookupDirector sourceLocator = new JavaSourceLookupDirector();
		ISourcePathComputer locator = getLaunchManager().getSourcePathComputer(SOURCE_LOCATOR);
		if (locator != null) {
			sourceLocator.setSourcePathComputer(locator); 
			sourceLocator.initializeDefaults(configuration);
			launch.setSourceLocator(sourceLocator);
		}
	}
}