java菜单设置

源代码

package Experiments; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; public class Experiment73 { public static void main(String[] args) { new MyMenu().display(); } } class MyMenu extends MouseAdapter implements ActionListener{ JFrame f; JMenuBar mb1; JMenu mf1, me1; JPopupMenu pm1; JTextArea jta; JScrollPane jsp; public void display(){ f = new JFrame("菜单"); f.setSize(240, 180); f.setLayout(null); jta = new JTextArea(); jsp = new JScrollPane(jta); jsp.setBounds(0, 0, 240, 180); f.add(jsp); jta.addMouseListener(this); addPopupMenu(); addMyMenu(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); } public void addPopupMenu(){ pm1 = new JPopupMenu("Popup"); pm1.add(new JMenuItem("复制")); pm1.add(new JMenuItem("粘贴")); jta.add(pm1); } public void addMyMenu() { mb1 = new JMenuBar(); f.setJMenuBar(mb1); mf1 = new JMenu("文件"); me1 = new JMenu("编辑"); mb1.add(mf1); mb1.add(me1); mf1.add(new JMenuItem("打开")); mf1.add(new JMenuItem("保存")); mf1.addSeparator(); JMenuItem itemExit = new JMenuItem("退出"); mf1.add(itemExit); itemExit.addActionListener(this); me1.add(new JMenuItem("剪切")); me1.add(new JMenuItem("复制")); } @Override public void actionPerformed(ActionEvent e) { if(e.getActionCommand() == "退出") System.exit(0); } public void mouseReleased(MouseEvent mer){ if(mer.isPopupTrigger()) pm1.show((Component)mer.getSource(), mer.getX(), mer.getY()); } }

运行结果