關於jfc的問題!

Question

比如你的container是JPanel，那么你可以用下面的代码添加按钮，不用布局JPanel panel = new JPanel();
JButton button = new JButton("Test");
panel.setLayout(null);
button.setBounds(10,10,100,30);//100,30是button的长和高
panel.add(button);这样就可以用坐标定位了

Answer 1

jFrameMain.getContentPane().setLayout(new BorderLayout());
      jPanelRight.setLayout(null);
      jPanelRight.setBounds(10,10,100,30);
      jPanelRight.add(jl_Mode);
      jPanelRight.setBounds(10,40,100,30);
      jPanelRight.add(jl_Title);
      jPanelRight.setBounds(10,60,100,30);
      jPanelRight.add(jl_rec);
      
      jTable.setBorder(new EtchedBorder());
      jFrameMain.getContentPane().add(jPanelRight,BorderLayout.EAST);
      
      jPanelDown.setBorder(new EtchedBorder());
      jFrameMain.getContentPane().add(jPanelDown,BorderLayout.SOUTH);
jFrameMain.addWindowListener(this);
jFrameMain.setSize(800,570);
jFrameMain.setVisible(true);
jFrameMain.setExtendedState(jFrameMain.MAXIMIZED_BOTH);為何jPanelRight不能正常顯示?