java 弹出菜单_java右键弹出菜单

package test1;

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

public class Applet1 extends Applet {

boolean isStandalone = false;

PopupMenu popupMenu1 = new PopupMenu();

MenuItem menuItem1 = new MenuItem();

MenuItem menuItem2 = new MenuItem();

MenuItem menuItem3 = new MenuItem();

Button button1 = new Button();

/**Get a parameter value*/

public String getParameter(String key, String def) {

return isStandalone ? System.getProperty(key, def) :

(getParameter(key) != null ? getParameter(key) : def);

}

/**Construct the applet*/

public Applet1() {

}

/**Initialize the applet*/

public void init() {

try {

jbInit();

}

catch(Exception e) {

e.printStackTrace();

}

}

/**Component initialization*/

private void jbInit() throws Exception {

menuItem1.setLabel("1");

menuItem2.setLabel("2");

menuItem3.setLabel("3");

button1.setLabel("button1");

file://这是button1的监听事件，

button1.addMouseListener(new java.awt.event.MouseAdapter() {

public void mousePressed(MouseEvent e) {

button1_mousePressed(e);

}

});

popupMenu1.add(menuItem1);

popupMenu1.add(menuItem2);

popupMenu1.add(menuItem3);

this.add(button1, null);

add(popupMenu1);

}

/**Get Applet information*/

public String getAppletInfo() {

return "Applet Information";

}

/**Get parameter info*/

public String[][] getParameterInfo() {

return null;

}

void button1_mousePressed(MouseEvent e) {

/*通过InputEvent.BUTTON3_MASK对右键的判断

要判断是左键用InputEvent.BUTTON1_MASK，

*/

int mods=e.getModifiers();

if((mods&InputEvent.BUTTON3_MASK)!=0)

{

popupMenu1.show(button1,e.getX(),e.getY());

button

}

}

}

file://applet1.java is over