如何启用拷贝/剪切/粘贴JMenuItem

Question

我正在用Netbeans制作文本编辑器，并在编辑菜单中添加了名为Copy、Cut和Paste的jMenuItems。

请问，如何使这些按钮在actionPerformed()之后执行相应的功能？

以下是我的尝试：

    private void CopyActionPerformed(java.awt.event.ActionEvent evt) {                                     

       JMenuItem Copy = new JMenuItem(new DefaultEditorKit.CopyAction()); 
    }                                    

    private void PasteActionPerformed(java.awt.event.ActionEvent evt) {                                      
     JMenuItem Paste = new JMenuItem(new DefaultEditorKit.PasteAction()); 
    }                                     

    private void CutActionPerformed(java.awt.event.ActionEvent evt) {                                    
       JMenuItem Cut = new JMenuItem(new DefaultEditorKit.CutAction()); 
    }                                   

- donthedestroyer

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请学习Java命名规范并遵循它们。 - kleopatra

Answer 1

带有剪切、复制和粘贴功能的简单编辑器示例：

      public class SimpleEditor extends JFrame {

      public static void main(String[] args) {
      JFrame window = new SimpleEditor();
      window.setVisible(true);
      }
      private JEditorPane editPane;   

      public SimpleEditor() {
      editPane = new JEditorPane("text/rtf","");
      JScrollPane scroller = new JScrollPane(editPane);
      setContentPane(scroller);
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      JMenuBar bar = new JMenuBar();
      setJMenuBar(bar);
      setSize(600,500);

      JMenu editMenu = new JMenu("Edit");

      Action cutAction = new DefaultEditorKit.CutAction();
      cutAction.putValue(Action.NAME, "Cut");
      editMenu.add(cutAction);

      Action copyAction = new DefaultEditorKit.CopyAction();
      copyAction.putValue(Action.NAME, "Copy");
      editMenu.add(copyAction);

      Action pasteAction = new DefaultEditorKit.PasteAction();
      pasteAction.putValue(Action.NAME, "Paste");
      editMenu.add(pasteAction);

      bar.add(editMenu);
   }

}

希望这能帮到你！

- MRSGT _GT

---

没问题！但是，请阅读Java Swing并完全理解代码以扩展您的代码！ :) - MRSGT _GT

Answer 2

JEditorPane edit=... your instance;

然后使用其中一个。

    edit.cut();
    edit.copy();
    edit.paste();

- StanislavL