JFrame jsb new JFrame我的窗口jsb.setDefaultCloseOperation JFrame.EXIT ON CLOSE jsb.setSize500400jsb.setTitle实验jsb.setBackground Color.red jsb.setLayout new BorderLayout1010默认布局管理器分为东南西北中间5个位置jsb.setLayout new FlowLayout FlowLayout.CENTER流式布局管理器jsb.setLayout new GridLayout211010网格布局管理器自己设定横竖的值组件按照指定数目排列JButton e new JButton中间e.setBackground Color.blue JButton b new JButton北JButton a new JButton南