监听不起作用,神马情况? 监听 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 添加按钮.addActionListener(this);了没; 代码没传完整。。 import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.JFrame;import java.awt.Color;import java.awt.Dimension;import java.awt.Frame;import java.awt.Graphics;import java.awt.Image;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.PopupMenu;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.geom.Rectangle2D;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.ScrollPaneConstants;import javax.swing.SwingConstants;import javax.xml.ws.handler.MessageContext.Scope;public class MainFrame extends JFrame implements ActionListener { Image img; PopupMenu popm = new PopupMenu(); private JTextArea ta; public void mainFrame() { setTitle("小区欢迎您!"); setBounds(800, 750, 750, 700); setLocation(800, 600); JPanel mp = new JPanel(); JMenuBar mb = new JMenuBar(); JMenu yh = new JMenu("用户管理"); JMenu sf = new JMenu("收费管理"); JMenu ts = new JMenu("投诉管理"); JMenu gy = new JMenu("公工基础信息"); JMenu zd = new JMenu("制度管理"); JMenu hp = new JMenu("帮助"); mb.add(yh); mb.add(sf); mb.add(gy); mb.add(zd); mb.add(hp); JMenuItem yhcx = new JMenuItem("用户查询"); JMenuItem yhadd = new JMenuItem("添加用户"); JMenuItem sflist = new JMenuItem("收费标准"); JMenuItem sfzz = new JMenuItem("最终收费"); JMenuItem tscx = new JMenuItem("投诉查看"); JMenuItem tsadd = new JMenuItem("添加投诉"); JMenuItem gycx = new JMenuItem("公用信息查询"); JMenuItem zdadd = new JMenuItem("添加制度"); JMenuItem zdcx = new JMenuItem("制度查询"); yhcx.addActionListener(this); yhadd.addActionListener(this); sflist.addActionListener(this); sfzz.addActionListener(this); tscx.addActionListener(this); tsadd.addActionListener(this); gycx.addActionListener(this); zdadd.addActionListener(this); zdcx.addActionListener(this); hp.addActionListener(this); yh.add(yhadd); yh.add(yhcx); sf.add(sflist); sf.add(sfzz); ts.add(tscx); ts.add(tsadd); zd.add(zdadd); zd.add(zdcx); gy.add(gycx); setJMenuBar(mb); setContentPane(mp); setVisible(true); Dimension scr=Toolkit.getDefaultToolkit().getScreenSize(); Dimension frm = this.getSize(); setLocation((int)(scr.getWidth()-frm.getWidth())/2, (int)(scr.getHeight()-frm.getHeight())/2-40); } public static void main(String[] args) { MainFrame t = new MainFrame(); t.mainFrame(); } @Override public void actionPerformed(ActionEvent ae) { // TODO Auto-generated method stub if(ae.getSource()=="用户查询") { }if (ae.getSource()=="添加用户") { userTA a = new userTA();// a.adduserTA(); }if (ae.getSource()=="收费标准") { }if (ae.getSource()=="最终收费") { } if (ae.getSource()=="投诉查看") { }if (ae.getSource()=="添加投诉") { }if (ae.getSource()=="公用信息查询") { }if (ae.getSource()=="添加制度") { }if (ae.getSource()=="帮助") { //JOptionPane.showMessageDialog(this, "看使用说明!"); System.out.println("帮助++"); } }} yhcx.addActionListener(this);这种对象应该可以监听吧!!? 你是要监听哪个?例如:监听 用户查询方法1:if (ae.getActionCommand().toString() == "用户查询") { System.out.println("aa"); }方法2:if (ae.getSource() instanceof JMenuItem)//判断事件源是否为菜单项 { String ItemName = ae.getActionCommand(); if (ItemName.equals("用户查询")) { System.out.println("yonghu"); } }如果要监听 帮助 ,帮助 是JMenu,是菜单,这个我没监听过; package test;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.JFrame;import java.awt.Button;import java.awt.Color;import java.awt.Dimension;import java.awt.Frame;import java.awt.Graphics;import java.awt.Image;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.PopupMenu;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.geom.Rectangle2D;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.ScrollPaneConstants;import javax.swing.SwingConstants;import javax.xml.ws.handler.MessageContext.Scope;public class MainFrame extends JFrame implements ActionListener { Image img; PopupMenu popm = new PopupMenu(); private JTextArea ta; JMenuItem help=new JMenuItem("帮助"); JMenuItem yhcx = new JMenuItem("用户查询"); JMenuItem yhadd = new JMenuItem("添加用户"); JMenuItem sflist = new JMenuItem("收费标准"); JMenuItem sfzz = new JMenuItem("最终收费"); JMenuItem tscx = new JMenuItem("投诉查看"); JMenuItem tsadd = new JMenuItem("添加投诉"); JMenuItem gycx = new JMenuItem("公用信息查询"); JMenuItem zdadd = new JMenuItem("添加制度"); JMenuItem zdcx = new JMenuItem("制度查询"); public MainFrame() { setTitle("小区欢迎您!"); setBounds(800, 750, 750, 700); setLocation(800, 600); JPanel mp = new JPanel(); JMenuBar mb = new JMenuBar(); JMenu yh = new JMenu("用户管理"); JMenu sf = new JMenu("收费管理"); JMenu ts = new JMenu("投诉管理"); JMenu gy = new JMenu("公工基础信息"); JMenu zd = new JMenu("制度管理"); JMenu hp = new JMenu("帮助中心"); mb.add(yh); mb.add(sf); mb.add(gy); mb.add(zd); mb.add(hp); yhcx.addActionListener(this); yhadd.addActionListener(this); sflist.addActionListener(this); sfzz.addActionListener(this); tscx.addActionListener(this); tsadd.addActionListener(this); gycx.addActionListener(this); zdadd.addActionListener(this); zdcx.addActionListener(this); help.addActionListener(this); yh.add(yhadd); yh.add(yhcx); sf.add(sflist); sf.add(sfzz); ts.add(tscx); ts.add(tsadd); zd.add(zdadd); zd.add(zdcx); gy.add(gycx);hp.add(help); setJMenuBar(mb); setContentPane(mp); setVisible(true); Dimension scr = Toolkit.getDefaultToolkit().getScreenSize(); Dimension frm = this.getSize(); setLocation((int) (scr.getWidth() - frm.getWidth()) / 2, (int) (scr.getHeight() - frm.getHeight()) / 2 - 40); } public static void main(String[] args) { new MainFrame(); } @Override public void actionPerformed(ActionEvent ae) { // TODO Auto-generated method stub if (ae.getSource() == "用户查询") { } if (ae.getSource() == "添加用户") { userTA a = new userTA(); // a.adduserTA(); } if (ae.getSource() == "收费标准") { } if (ae.getSource() == "最终收费") { } if (ae.getSource() == "投诉查看") { } if (ae.getSource() == "添加投诉") { } if (ae.getSource() == "公用信息查询") { } if (ae.getSource() == "添加制度") { } if (ae.getSource().equals(help)) { // JOptionPane.showMessageDialog(this, "看使用说明!"); System.out.println("帮助++"); } }}可以了吧 关于位移运算符的一个疑问 java监听WM_COPYDATA消息 异常在抛出一次之后就不能再抛出了吗? 对话框的文本怎么提取到框架的文本区中 您好,问个问题 在mysql 5.0 里直接输入数据时 都是?号,请问怎么解决? 一般情况下数据结构或算法在实际编程中是不是很少用到? import自己写的类后,编译出问题。急-解决后马上结帖 在JBuilder8中要怎样配置才能方便地运行Servlet呢? 各位好!请问如何得到ssl证书及如何install?100分感谢!!! 哥们这是什么情况来着,关于gui小项目-贪吃蛇. 求助,eclipse开发 java 中JFM问题
添加按钮.addActionListener(this);了没;
代码没传完整。。
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;import javax.swing.JFrame;import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;
import javax.xml.ws.handler.MessageContext.Scope;public class MainFrame extends JFrame implements ActionListener {
Image img;
PopupMenu popm = new PopupMenu();
private JTextArea ta; public void mainFrame() {
setTitle("小区欢迎您!");
setBounds(800, 750, 750, 700);
setLocation(800, 600);
JPanel mp = new JPanel();
JMenuBar mb = new JMenuBar();
JMenu yh = new JMenu("用户管理");
JMenu sf = new JMenu("收费管理");
JMenu ts = new JMenu("投诉管理");
JMenu gy = new JMenu("公工基础信息");
JMenu zd = new JMenu("制度管理");
JMenu hp = new JMenu("帮助");
mb.add(yh);
mb.add(sf);
mb.add(gy);
mb.add(zd);
mb.add(hp);
JMenuItem yhcx = new JMenuItem("用户查询");
JMenuItem yhadd = new JMenuItem("添加用户");
JMenuItem sflist = new JMenuItem("收费标准");
JMenuItem sfzz = new JMenuItem("最终收费");
JMenuItem tscx = new JMenuItem("投诉查看");
JMenuItem tsadd = new JMenuItem("添加投诉");
JMenuItem gycx = new JMenuItem("公用信息查询");
JMenuItem zdadd = new JMenuItem("添加制度");
JMenuItem zdcx = new JMenuItem("制度查询"); yhcx.addActionListener(this);
yhadd.addActionListener(this);
sflist.addActionListener(this);
sfzz.addActionListener(this);
tscx.addActionListener(this);
tsadd.addActionListener(this);
gycx.addActionListener(this);
zdadd.addActionListener(this);
zdcx.addActionListener(this);
hp.addActionListener(this);
yh.add(yhadd);
yh.add(yhcx);
sf.add(sflist);
sf.add(sfzz);
ts.add(tscx);
ts.add(tsadd);
zd.add(zdadd);
zd.add(zdcx);
gy.add(gycx);
setJMenuBar(mb);
setContentPane(mp);
setVisible(true);
Dimension scr=Toolkit.getDefaultToolkit().getScreenSize();
Dimension frm = this.getSize();
setLocation((int)(scr.getWidth()-frm.getWidth())/2,
(int)(scr.getHeight()-frm.getHeight())/2-40);
}
public static void main(String[] args) {
MainFrame t = new MainFrame();
t.mainFrame();
} @Override
public void actionPerformed(ActionEvent ae) {
// TODO Auto-generated method stub
if(ae.getSource()=="用户查询")
{
}if (ae.getSource()=="添加用户") {
userTA a = new userTA();
// a.adduserTA();
}if (ae.getSource()=="收费标准") {
}if (ae.getSource()=="最终收费") {
}
if (ae.getSource()=="投诉查看") {
}if (ae.getSource()=="添加投诉") {
}if (ae.getSource()=="公用信息查询") {
}if (ae.getSource()=="添加制度") {
}if (ae.getSource()=="帮助") {
//JOptionPane.showMessageDialog(this, "看使用说明!");
System.out.println("帮助++");
}
}}
yhcx.addActionListener(this);这种对象应该可以监听吧!!?
例如:监听 用户查询方法1:if (ae.getActionCommand().toString() == "用户查询")
{
System.out.println("aa");
}
方法2:if (ae.getSource() instanceof JMenuItem)//判断事件源是否为菜单项
{
String ItemName = ae.getActionCommand();
if (ItemName.equals("用户查询"))
{
System.out.println("yonghu");
}
}
如果要监听 帮助 ,帮助 是JMenu,是菜单,这个我没监听过;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;import javax.swing.JFrame;import java.awt.Button;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;
import javax.xml.ws.handler.MessageContext.Scope;public class MainFrame extends JFrame implements ActionListener {
Image img; PopupMenu popm = new PopupMenu();
private JTextArea ta;
JMenuItem help=new JMenuItem("帮助");
JMenuItem yhcx = new JMenuItem("用户查询");
JMenuItem yhadd = new JMenuItem("添加用户");
JMenuItem sflist = new JMenuItem("收费标准");
JMenuItem sfzz = new JMenuItem("最终收费");
JMenuItem tscx = new JMenuItem("投诉查看");
JMenuItem tsadd = new JMenuItem("添加投诉");
JMenuItem gycx = new JMenuItem("公用信息查询");
JMenuItem zdadd = new JMenuItem("添加制度");
JMenuItem zdcx = new JMenuItem("制度查询");
public MainFrame() { setTitle("小区欢迎您!");
setBounds(800, 750, 750, 700);
setLocation(800, 600);
JPanel mp = new JPanel();
JMenuBar mb = new JMenuBar();
JMenu yh = new JMenu("用户管理");
JMenu sf = new JMenu("收费管理");
JMenu ts = new JMenu("投诉管理");
JMenu gy = new JMenu("公工基础信息");
JMenu zd = new JMenu("制度管理");
JMenu hp = new JMenu("帮助中心");
mb.add(yh);
mb.add(sf);
mb.add(gy);
mb.add(zd);
mb.add(hp); yhcx.addActionListener(this);
yhadd.addActionListener(this);
sflist.addActionListener(this);
sfzz.addActionListener(this);
tscx.addActionListener(this);
tsadd.addActionListener(this);
gycx.addActionListener(this);
zdadd.addActionListener(this);
zdcx.addActionListener(this);
help.addActionListener(this); yh.add(yhadd);
yh.add(yhcx);
sf.add(sflist);
sf.add(sfzz);
ts.add(tscx);
ts.add(tsadd);
zd.add(zdadd);
zd.add(zdcx);
gy.add(gycx);
hp.add(help); setJMenuBar(mb);
setContentPane(mp);
setVisible(true); Dimension scr = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frm = this.getSize();
setLocation((int) (scr.getWidth() - frm.getWidth()) / 2,
(int) (scr.getHeight() - frm.getHeight()) / 2 - 40); } public static void main(String[] args) {
new MainFrame();
} @Override
public void actionPerformed(ActionEvent ae) {
// TODO Auto-generated method stub
if (ae.getSource() == "用户查询") { }
if (ae.getSource() == "添加用户") {
userTA a = new userTA();
// a.adduserTA(); }
if (ae.getSource() == "收费标准") { }
if (ae.getSource() == "最终收费") { }
if (ae.getSource() == "投诉查看") { }
if (ae.getSource() == "添加投诉") { }
if (ae.getSource() == "公用信息查询") { }
if (ae.getSource() == "添加制度") { }
if (ae.getSource().equals(help)) {
// JOptionPane.showMessageDialog(this, "看使用说明!");
System.out.println("帮助++");
}
}}
可以了吧