Bug 13034 Cannot create a Source Folder in a new Java Project
build 20020404 If you try and create a Source Folder in a Java Project you have just created you get an error preventing you from hitting finish. STEPS 1) Create Java Project Foo 2) Open New->Source Folder 3) Enter Bar as the name - you will get "Cannot nest entry Bar inside entry Foo/Bar" 4) Create a folder Bar. 5) Add it as a source folder in the Properties Dialog for Foo. No problem.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/BuildPathsBlock.java
fBuildPathDialogField.setText(container.getFullPath().toString());
			}
		}
	}
	
	private void buildPathDialogFieldChanged(DialogField field) {
		if (field == fClassPathList) {
			updateClassPathStatus();
			updateBuildPathStatus();
		} else if (field == fBuildPathDialogField) {
			updateBuildPathStatus();
		}
		doStatusLineUpdate();
	}	
	
	
	
	
	private void doStatusLineUpdate() {
		IStatus res= findMostSevereStatus();
		fContext.statusChanged(res);
	}
	
	private IStatus findMostSevereStatus() {
		return StatusUtil.getMoreSevere(fClassPathStatus, fBuildPathStatus);
	}
	
	
	/**
	 * Validates the build path.