java - 如何在底部显示 jframe 中所有选项卡通用的按钮

Question

我需要 jframe 中的 jbutton，它对所有选项卡都是通用的。

我尝试将相同的 jbutton 添加到 3 个选项卡，但该按钮仅在最后添加的选项卡中可见。

这是我完整的独立代码。如果您运行此代码，您将完全了解我的问题。

    final JTabbedPane tabs = new JTabbedPane();
    JButton jbutton ;
    JTable table;   // Table 1 in 1st tab 
    JTable databaseTable; // Table 2 in 2nd tab
    JTable serverDetailsTable; // Table 3 in 3rd tab
    JFrame  frame = new JFrame();
    table = new JTable();
    final boolean[] canEdit = new boolean [] {
              false, true, true
          };
      String [] columnNames = {
          "col1", "col2", "col3"};
      Object[][] mappedDeploymentData=
            { 
                 {" ", "", ""},
                 {" ", "", ""}
            };
         DefaultTableModel tableModel = new DefaultTableModel(mappedDeploymentData, columnNames)
         {
             public boolean isCellEditable(int row, int column) {
                return canEdit[column];
             }
         };
         table.setModel(tableModel);

      table.setModel(tableModel);
      JScrollPane scrollPane = new JScrollPane(table);

      jbutton = new JButton(" Start "); //Button i want for all tabs in a frame
      jbutton.setBackground(Color.BLACK);
      jbutton.setForeground(Color.YELLOW);
      jbutton.setEnabled(true);

      JPanel panel = new JPanel();
      panel.setLayout(new BorderLayout());
      panel.add(scrollPane);
      panel.add(jbutton,BorderLayout.SOUTH);
      table.getTableHeader().setReorderingAllowed(false);
      tabs.add("Tab1", panel);

      databaseTable = new JTable();
      final boolean[] canEdit1 = new boolean [] {
                false, false, true,true
            };
        String [] databaseColumns = {
            "col1", "col2","col3"};
        Object[][] mappedDatabaseData= { 
                 {" ", "", ""},
                 {" ", "", ""}
            };

         DefaultTableModel mappedDatabaseTablemodel = new DefaultTableModel(mappedDatabaseData, databaseColumns)
          {
              public boolean isCellEditable(int row, int column) {
                 return canEdit1[column];
              }
          };

        databaseTable.setModel(mappedDatabaseTablemodel);
        JScrollPane databaseScrollPane = new JScrollPane(databaseTable);
        JPanel databasePanel = new JPanel();
        databasePanel.setLayout(new BorderLayout());
        databasePanel.add(databaseScrollPane);
        databaseTable.getTableHeader().setReorderingAllowed(false);
        tabs.add("Tab2", databasePanel);


        serverDetailsTable = new JTable();  
        final boolean[] canEdit2 = new boolean [] {
                false, true
            };
        String [] server = {
            " col1", " col2"};
        Object[][] serverDeatils=
            { 
                 {"",""},
                 {"",""}
            };

         DefaultTableModel serverDatabaseTablemodel = new DefaultTableModel(serverDeatils, server)
          {
              public boolean isCellEditable(int row, int column) {
                 return canEdit2[column];
              }
          };
          serverDetailsTable.setModel(serverDatabaseTablemodel);
          JScrollPane serverScrollPane = new JScrollPane(serverDetailsTable);
          serverScrollPane.setVisible(true);
          JPanel serverPanel = new JPanel();
          serverPanel.setLayout(new BorderLayout());
          serverPanel.add(serverScrollPane);
          serverDetailsTable.setTableHeader(null);
          tabs.add("Tab3", serverPanel);



    frame.setContentPane(tabs);
    frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    frame.setTitle("Frame");
    frame.pack();
    frame.setSize(900, 600);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);

如果您运行上述独立程序，您可以在第一个选项卡中看到该按钮，我需要在所有选项卡中显示相同的按钮。

Answer 1

您仅将按钮添加到第一个选项卡。

考虑创建一个主面板，它将作为框架的内容 Pane ，然后向其中添加选项卡 Pane 和按钮:

JPanel mainPanel = new JPanel(new BorderLayout());
mainPanel.add(tabs, BorderLayout.CENTER);
mainPanel.add(jbutton, BorderLayout.SOUTH);

frame.setContentPane(mainPanel); 

同时删除以下行，因为您不想将按钮添加到某个特定选项卡:

panel.add(jbutton, BorderLayout.SOUTH);