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监视器实例化出现错误,红色代码处
发表在Java图书答疑
2013-09-22
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package cn.zyj;
import java.awt.*;
import java.awt.event.*;
public class TestActionEvent {
public static void main(String[] args) {
Frame f = new Frame("test");
Button b = new Button("Press me");
[font color=#FF0000]Monitor bh = new Monitor();[/font]
b.addActionListener(bh);
f.add(b, BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
class Monitor implements ActionListener {
public void actionPerformed(ActionEvent e) {
System.out.println("A button has been press.");
}
}
}
import java.awt.*;
import java.awt.event.*;
public class TestActionEvent {
public static void main(String[] args) {
Frame f = new Frame("test");
Button b = new Button("Press me");
[font color=#FF0000]Monitor bh = new Monitor();[/font]
b.addActionListener(bh);
f.add(b, BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
class Monitor implements ActionListener {
public void actionPerformed(ActionEvent e) {
System.out.println("A button has been press.");
}
}
}