我的程序实现了actionPerformed 方法,但是编译的时候总是说未实现该方法,还有未知的变量e 在e.getActionCommand()中
我实在看不出什么问题请高手帮忙,我是新手,谢谢。完整程序如下:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class TestSwing implements ActionListener{
public static void main(String args[]){
new TestSwing().createUI();
} public void createUI(){
JFrame jf=new JFrame("My test");
JMenuBar jmb=new JMenuBar();
JMenu menu_file=new JMenu("file");
JMenu menu_help=new JMenu("help");
JMenuItem mi_new =new JMenuItem("new");
JMenuItem mi_open =new JMenuItem("open");
JMenuItem mi_save =new JMenuItem("save");
mi_new.addActionListener(this);
mi_open.addActionListener(this);
mi_save.addActionListener(this);
mi_new.setMnemonic('N');
mi_open.setMnemonic('O');
mi_save.setMnemonic('S');
menu_file.setMnemonic('F');
menu_help.setMnemonic('H');
menu_file.add(mi_new);
menu_file.add(mi_open);
menu_file.add(mi_save);
jmb.add(menu_file);
jmb.add(menu_help); JToolBar jtb=new JToolBar();
JButton button_new=new JButton(new ImageIcon("new.gif"));
JButton button_open=new JButton(new ImageIcon("open.gif"));
JButton button_save=new JButton(new ImageIcon("save.gif"));
button_new.setActionCommand("New");
button_open.setActionCommand("Open");
button_save.setActionCommand("Save");
button_new.setToolTipText("create file");
button_open.setToolTipText("open file");
button_save.setToolTipText("save file");
button_new.addActionListener(this);
button_open.addActionListener(this);
button_save.addActionListener(this);
jtb.add(button_new);
jtb.add(button_open);
jtb.add(button_save); JPanel jp=new JPanel();
JButton button_start=new JButton("start");
JButton button_stop=new JButton("stop");
button_start.setToolTipText("start operation");
button_stop.setToolTipText("over");
button_start.setMnemonic('S');
button_stop.setMnemonic('t');
button_start.addActionListener(this);
button_stop.addActionListener(this);
jp.add(button_start);
jp.add(button_stop); jf.setJMenuBar(jmb);
jf.add(jtb,"North");
jf.add(jp,"South");
jf.setSize(300,200);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
}
public void actionPerformed(ActionEvent e){
System.out.println(e.getActionCommand());
}
}
我实在看不出什么问题请高手帮忙,我是新手,谢谢。完整程序如下:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class TestSwing implements ActionListener{
public static void main(String args[]){
new TestSwing().createUI();
} public void createUI(){
JFrame jf=new JFrame("My test");
JMenuBar jmb=new JMenuBar();
JMenu menu_file=new JMenu("file");
JMenu menu_help=new JMenu("help");
JMenuItem mi_new =new JMenuItem("new");
JMenuItem mi_open =new JMenuItem("open");
JMenuItem mi_save =new JMenuItem("save");
mi_new.addActionListener(this);
mi_open.addActionListener(this);
mi_save.addActionListener(this);
mi_new.setMnemonic('N');
mi_open.setMnemonic('O');
mi_save.setMnemonic('S');
menu_file.setMnemonic('F');
menu_help.setMnemonic('H');
menu_file.add(mi_new);
menu_file.add(mi_open);
menu_file.add(mi_save);
jmb.add(menu_file);
jmb.add(menu_help); JToolBar jtb=new JToolBar();
JButton button_new=new JButton(new ImageIcon("new.gif"));
JButton button_open=new JButton(new ImageIcon("open.gif"));
JButton button_save=new JButton(new ImageIcon("save.gif"));
button_new.setActionCommand("New");
button_open.setActionCommand("Open");
button_save.setActionCommand("Save");
button_new.setToolTipText("create file");
button_open.setToolTipText("open file");
button_save.setToolTipText("save file");
button_new.addActionListener(this);
button_open.addActionListener(this);
button_save.addActionListener(this);
jtb.add(button_new);
jtb.add(button_open);
jtb.add(button_save); JPanel jp=new JPanel();
JButton button_start=new JButton("start");
JButton button_stop=new JButton("stop");
button_start.setToolTipText("start operation");
button_stop.setToolTipText("over");
button_start.setMnemonic('S');
button_stop.setMnemonic('t');
button_start.addActionListener(this);
button_stop.addActionListener(this);
jp.add(button_start);
jp.add(button_stop); jf.setJMenuBar(jmb);
jf.add(jtb,"North");
jf.add(jp,"South");
jf.setSize(300,200);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
}
public void actionPerformed(ActionEvent e){
System.out.println(e.getActionCommand());
}
}
import java.awt.event.*;
import javax.swing.*;public class TestSwing implements ActionListener { public static void main(String args[]) {
new TestSwing().createUI();
} public void createUI() {
JFrame jf = new JFrame("My test");
JMenuBar jmb = new JMenuBar();
JMenu menu_file = new JMenu("file");
JMenu menu_help = new JMenu("help");
JMenuItem mi_new = new JMenuItem("new");
JMenuItem mi_open = new JMenuItem("open");
JMenuItem mi_save = new JMenuItem("save");
mi_new.addActionListener(this);
mi_open.addActionListener(this);
mi_save.addActionListener(this);
mi_new.setMnemonic('N');
mi_open.setMnemonic('O');
mi_save.setMnemonic('S');
menu_file.setMnemonic('F');
menu_help.setMnemonic('H');
menu_file.add(mi_new);
menu_file.add(mi_open);
menu_file.add(mi_save);
jmb.add(menu_file);
jmb.add(menu_help); JToolBar jtb = new JToolBar();
JButton button_new = new JButton(new ImageIcon("new.gif"));
JButton button_open = new JButton(new ImageIcon("open.gif"));
JButton button_save = new JButton(new ImageIcon("save.gif"));
button_new.setActionCommand("New");
button_open.setActionCommand("Open");
button_save.setActionCommand("Save");
button_new.setToolTipText("create file");
button_open.setToolTipText("open file");
button_save.setToolTipText("save file");
button_new.addActionListener(this);
button_open.addActionListener(this);
button_save.addActionListener(this);
jtb.add(button_new);
jtb.add(button_open);
jtb.add(button_save); JPanel jp = new JPanel();
JButton button_start = new JButton("start");
JButton button_stop = new JButton("stop");
button_start.setToolTipText("start operation");
button_stop.setToolTipText("over");
button_start.setMnemonic('S');
button_stop.setMnemonic('t');
button_start.addActionListener(this);
button_stop.addActionListener(this);
jp.add(button_start);
jp.add(button_stop); jf.setJMenuBar(jmb);
jf.add(jtb, "North");
jf.add(jp, "South");
jf.setSize(300, 200);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
} public void actionPerformed(ActionEvent e) {
System.out.println(e.getActionCommand());
}
}
My test
file help start stop
你检查下cmd