用鼠标右键单击弹出快捷菜单的Java代码.docx

package windowcomponents;import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import javax.swing.ButtonGroup;import javax.swing.JColorChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuItem;import javax.swing.JPopupMenu;import javax.swing.JRadioButtonMenuItem;public class ClickRightMouseButtonViewShortcutMenu /* * param args */public static void main(String args) / TODO Auto-generated method stubDemoWindow13 dw = new DemoWindow13(右击显示快捷菜单);dw.setBounds(dw.getToolkit().getScreenSize().width / 3, dw.getToolkit().getScreenSize().height / 3,dw.getToolkit().getScreenSize().width / 3, dw.getToolkit().getScreenSize().height / 3);dw.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);dw.setVisible(true);class DemoWindow13 extends JFrame implements ActionListener / 可以调整位置和颜色的标签JLabel jl = new JLabel(你们好, JLabel.CENTER);JPopupMenu menu = new JPopupMenu();JMenu jm1 = new JMenu(对齐);JMenu jm2 = new JMenu(颜色);JMenuItem item1 = new JRadioButtonMenuItem(左对齐);JMenuItem item2 = new JRadioButtonMenuItem(右对齐);JMenuItem item3 = new JRadioButtonMenuItem(居中对齐);JMenuItem item4 = new JMenuItem(前景色);JMenuItem item5 = new JMenuItem(背景色);/ 按钮组ButtonGroup bg = new ButtonGroup();public DemoWindow13(String title) super(title);setLayout(new GridLayout(1, 1);jl.setFont(new Font(黑体, Font.BOLD, 40);add(jl);jm1.add(item1);jm1.add(item2);jm1.add(item3);jm2.add(item4);jm2.add(item5);menu.add(jm1);menu.add(jm2);add(menu);bg.add(item1);bg.add(item2);bg.add(item3);/ 设置鼠标右键单击标签可以弹出菜单jl.addMouseListener(new MouseAdapter() public void mouseReleased(MouseEvent e) if (e.isPopupTrigger() / 在当前点击位置显示弹出菜单menu.show(e.getComponent(), e.getX(), e.getY(););item1.addActionListener(this);item2.addActionListener(this);item3.addActionListener(this);item4.addActionListener(this);item5.addActionListener(this);public void actionPerformed(ActionEvent e) / TODO Auto-generated method stubJMenuItem jmi = (JMenuItem) e.getSource();if (jmi = item1) jl.setHorizontalAlignment(JLabel.LEFT); else if (jmi = item2) jl.setHorizontalAlignment(JLabel.RIGHT); else if (jmi = item3) jl.setHorizontalAlignment(JLabel.CENTER); else if (jmi = item4) / 显示颜色对话框Color color = JColorChooser.showDialog(this, 前景色,jl.getForeground();if (color != null) / 设置标签的前景色jl.setForeground(color); else if (jmi = item5) / 显示颜色选择对话框Color