?? first.java~44~
字號(hào):
package testsystem;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class first extends Frame implements ActionListener
{
static first frm=new first();
static Button bt1=new Button("變色");
static Button bt2=new Button("關(guān)閉");
public static void main(String[] args)
{
frm.setLayout(new FlowLayout());
frm.setSize(200,300);
frm.setLocation(300,300);
frm.add(bt1);
frm.add(bt2);
bt1.addActionListener(frm);
bt2.addActionListener(frm);
frm.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==bt1)
{
frm.setBackground(Color.CYAN);
}
else
{
System.exit(0);
}
}
}
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