参考:http://stackoverflow.com/questions/20260372/swingworker-progressbar
There are four rules to follow with SwingWorker. You can refer to this diagram: 
本文介绍 SwingWorker 类在 Java Swing 中的应用,特别是如何利用 SwingWorker 实现进度条更新,确保 GUI 更新操作在事件调度线程中进行。遵循四个基本规则,并通过图表辅助理解,帮助开发者掌握正确使用 SwingWorker 更新界面的方法。
参考:http://stackoverflow.com/questions/20260372/swingworker-progressbar
There are four rules to follow with SwingWorker. You can refer to this diagram: 
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