java JPanel 不显示
getContentPane().setLayout(null);setBounds(200,150,1020,600);setDefaultCloseOperation...
getContentPane().setLayout(null); setBounds(200, 150, 1020, 600); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel contentPane=new JPanel(null); JButton jButton1 = new JButton("查看详情"); jButton1.setBounds(20, 500, 100, 35); contentPane.add(jButton1); // setContentPane(contentPane);// contentPane.setBorder(new EmptyBorder(5, 5, 50, 5)); contentPane.setLayout(new BorderLayout(0, 0)); JPanel p1 = new JPanel(null);// p1.setSize(200,200); p1.setBorder(new EmptyBorder(20, 20, 100, 600)); p1.setLayout(new BorderLayout(0, 0)); JScrollPane scrollPane1 = new JScrollPane(); p1.add(scrollPane1); JPanel p2 = new JPanel(null);// p2.setSize(200, 200); p2.setBorder(new EmptyBorder(20, 600, 100, 20)); p2.setLayout(new BorderLayout(0, 0)); JScrollPane scrollPane2 = new JScrollPane(); p2.add(scrollPane2); contentPane.add(p1); contentPane.add(p2); setContentPane(contentPane);怎么只显示p2
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