package GUI;import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;public class FrameDmeo4 { public static void main(String[] args) {
Frame f=new Frame("颜色变化");
f.setBounds(400, 200, 400, 300);
f.setLayout(new FlowLayout());
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
Button b1=new Button("红色");
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
f.setForeground(Color.red);
}
});
f.setVisible(true);
}
}
f.add(b1);
b1.addActionListener(new ActionListener() {
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;public class FrameDmeo4 { public static void main(String[] args) {
Frame f=new Frame("颜色变化");
f.setBounds(400, 200, 400, 300);
f.setLayout(new FlowLayout());
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
Button b1=new Button("红色");
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
f.setForeground(Color.red);
}
});
f.setVisible(true);
}
}
f.add(b1);
b1.addActionListener(new ActionListener() {
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