如图,我是btn是个按钮,menuItem是个菜单子选项,要让他们同时实现重新开始的功能。但是在运行的时候btn可以运行,menuItem不起作用,我基本上是按书上打的,Chess.this不知道为什么要加上它,而且加上了还是没作用。下面是部分代码
package chess;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import org.omg.CORBA.PUBLIC_MEMBER;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JLabel;
import java.awt.GridLayout;
import java.awt.FlowLayout;
import javax.swing.JButton;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
public class ChessBoard extends JFrame {
private JPanel contentPane;
private JButton btn;
private JButton btn2;
private JButton btn3;
private JMenuItem menuItem;
private JMenuItem menuItem_1;
private JMenuItem menuItem_2;
private Mypanel lblNewLabel;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ChessBoard frame = new ChessBoard();
frame.pack();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
c[b]lass MyListener implements ActionListener {
[color=#FF0000] public void actionPerformed(ActionEvent e){
Object obj=e.getSource();
if(obj==btn||obj==ChessBoard.this.menuItem){
lblNewLabel.reStart();
[/color]
}[/b]
}
}
public ChessBoard() {
MyListener mLi=new MyListener();
setTitle("\u5355\u673A\u4E94\u5B50\u68CB");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,600, 650);
JMenuBar menuBar = new JMenuBar();
menuBar.setToolTipText("\u7CFB\u7EDF");
setJMenuBar(menuBar);
JMenu menu = new JMenu("\u7CFB\u7EDF");
menuBar.add(menu);
menuItem = new JMenuItem("\u91CD\u65B0\u5F00\u59CB");
menu.add(menuItem);
menuItem_1 = new JMenuItem("\u6094\u68CB");
menu.add(menuItem_1);
menuItem_2 = new JMenuItem("\u9000\u51FA");
menu.add(menuItem_2);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5,5,5,5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
lblNewLabel = new Mypanel();
lblNewLabel.setForeground(Color.BLACK);
contentPane.add(lblNewLabel, BorderLayout.CENTER);
JPanel panel = new JPanel();
panel.setToolTipText("\u7684");
contentPane.add(panel, BorderLayout.SOUTH);
panel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
btn = new JButton("\u91CD\u65B0\u5F00\u59CB");
btn.addActionListener(mLi);
panel.add(btn);
btn2 = new JButton("New button");
btn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println(222);
}
});
panel.add(btn2);
btn3 = new JButton("New button");
panel.add(btn3);
}
}