更改标签名称

Question

我想通过点击通过添加的actionPerformed从弹出菜单“重命名”选项更改标签名称，并直接在选项卡中输入新的名称。

我发现这个jTabbedPane.setTitleAt(count, "string here");

但它不是我想要的东西，这只是设置参数传递的字符串。

感谢

Answer 1

通过添加JPopupMenu可以确定index和getTitleAt()从JTabbedPane

import java.awt.*; 
import javax.swing.*; 
import javax.swing.event.*; 

public class TabPopupDemo extends JFrame { 

    private static final long serialVersionUID = 1L; 
    private JLabel jLabel1; 
    private JLabel jLabel2; 
    private JMenuItem jMenuItem1; 
    private JPopupMenu jPopupMenu1; 
    private JTabbedPane jTabbedPane1; 

    public TabPopupDemo() { 
     setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
     setSize(400, 300); 
     setLocationRelativeTo(null); 
     jPopupMenu1 = new JPopupMenu(); 
     jMenuItem1 = new JMenuItem("jMenuItem1"); 
     jTabbedPane1 = new JTabbedPane(); 
     jLabel1 = new JLabel("jLabel1"); 
     jLabel2 = new JLabel("jLabel2"); 
     jPopupMenu1.add(jMenuItem1); 
     jTabbedPane1.addTab(null, jLabel1); 
     jTabbedPane1.addTab(null, jLabel2); 
     getContentPane().add(jTabbedPane1, BorderLayout.CENTER); 
     int tabCount = jTabbedPane1.getTabCount(); 
     for (int i = 0; i < tabCount; i++) { 
      JLabel jLabel = new JLabel("Testing the tab" + (i + 1)); 
      jTabbedPane1.setTabComponentAt(i, jLabel); 
      jLabel.setName(String.valueOf(i)); 
      jLabel.setComponentPopupMenu(jPopupMenu1); 
     } 
     jPopupMenu1.addPopupMenuListener(new PopupMenuListener() { 

      @Override 
      public void popupMenuCanceled(final PopupMenuEvent evt) { 
      } 

      @Override 
      public void popupMenuWillBecomeInvisible(final PopupMenuEvent evt) { 
      } 

      @Override 
      public void popupMenuWillBecomeVisible(final PopupMenuEvent evt) { 
       JPopupMenu source = (JPopupMenu) evt.getSource(); 
       JLabel invoker = (JLabel) source.getInvoker(); 
       JLabel component = (JLabel) jTabbedPane1.getComponentAt(Integer.parseInt(invoker.getName())); 
       jMenuItem1.setText(invoker.getText() + ": " + component.getText()); 
      } 
     }); 
    } 

    public static void main(final String args[]) { 
     EventQueue.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       new TabPopupDemo().setVisible(true); 
      } 
     }); 
    } 
}