【总结】gridbaglayout布局管理器

http://blog.sina.com.cn/s/blog_4e4d75a501008kc8.html
http://doc.java.sun.com/DocWeb/api/all/java.awt.GridBagLayout
http://blog.sina.com.cn/s/blog_7019362c0100n93q.html
http://blog.csdn.net/duck04551/article/details/5703208
http://hi.baidu.com/rainlove1122/blog/item/2bf94436bc1f2ad3a2cc2bca.html