completeEdit()方法抛出IllegalStateException

[youlongsam]

private synchronized void completeEdit(Editor editor, boolean success) throws IOException { Entry entry = editor.entry; if (entry.currentEditor != editor) { throw new IllegalStateException(); } ....... } 请问在这里IllegalStateException异常是什么问题，如果程序抛出这个异常，应该怎么处理