java swing中如何实现右键菜单呢?    直接上代码:

/*** java

* 设置弹出菜单

* @param qrResultLabel

*/

private void setPopupMenu(JComponent qrResultLabel)

{

final MyMenuActionListener myMenuListener=new MyMenuActionListener(this);

qrResultLabel.addMouseListener(new MouseInputAdapter()

{

@Override

public void mouseReleased(MouseEvent e)

{

//                super.mousePressed(e);

if (e.getButton() == MouseEvent.BUTTON3)

{

JPopupMenu textMenu = new JPopupMenu();

JMenuItem cleanUpM = new JMenuItem(MenuUtil2.ACTION_STR_CLEANUP);

JMenuItem copy22M = new JMenuItem(

MenuUtil2.ACTION_IMAGE_COPY);

JMenuItem paste22M = new JMenuItem(

MenuUtil2.ACTION_IMAGE_PASTE);

JMenuItem enlargeM = new JMenuItem(

MenuUtil2.ACTION_ENLARGE);

JMenuItem reduceM = new JMenuItem(

MenuUtil2.ACTION_REDUCE);

//                    JMenuItem pasteM = new JMenuItem(MenuUtil2.ACTION_STR_PASTE);

JMenuItem exportM = new JMenuItem(

MenuUtil2.ACTION_STR_EXPORT);

JMenuItem readQRCodeM = new JMenuItem(

MenuUtil2.ACTION_READ_QR_CODE);

copy22M.addActionListener(myMenuListener);

cleanUpM.addActionListener(myMenuListener);

exportM.addActionListener(myMenuListener);

enlargeM.addActionListener(myMenuListener);

reduceM.addActionListener(myMenuListener);

paste22M.addActionListener(myMenuListener);

readQRCodeM.addActionListener(myMenuListener);

textMenu.add(cleanUpM);

textMenu.add(copy22M);

textMenu.add(paste22M);

//                    exportM.add(pasteM);

textMenu.add(exportM);

textMenu.add(enlargeM);

textMenu.add(reduceM);

textMenu.add(readQRCodeM);

textMenu.show(e.getComponent(), e.getX(), e.getY());

}

}

});

}

注意:  1,鼠标右键对应的code是:MouseEvent.BUTTON3(3)  2,弹出菜单要使用JPopupMenu