代码问题:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;public class exam extends Applet implements ActionListener
{
Button button1,button2;
TextField text1;
Label a;
Panel p1,p2;
public void init()
{
setLayout(new GridLayout(2,1));
//先new:
p1=new Panel();
p2=new Panel();
add(p1);add(p2);
button1=new Button("display");
button2=new Button("suaxin");
a=new Label("display");
p1.setLayout(new GridLayout(1,2));
p1.add(button1);
p1.add(button2);
p2.setLayout(new GridLayout(1,2));
p2.add(a);
//先new:
text1 = new TextField("test");
p2.add(text1);
button1.addActionListener(this);
button2.addActionListener(this); }
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==button1)
{text1.setText("ok");
}
else if(e.getSource()==button2)
{
p2.removeAll();
}
}
}
import java.applet.*;
import java.awt.*;
import java.awt.event.*;public class exam extends Applet implements ActionListener
{
Button button1,button2;
TextField text1;
Label a;
Panel p1,p2;
public void init()
{
setLayout(new GridLayout(2,1));
//先new:
p1=new Panel();
p2=new Panel();
add(p1);add(p2);
button1=new Button("display");
button2=new Button("suaxin");
a=new Label("display");
p1.setLayout(new GridLayout(1,2));
p1.add(button1);
p1.add(button2);
p2.setLayout(new GridLayout(1,2));
p2.add(a);
//先new:
text1 = new TextField("test");
p2.add(text1);
button1.addActionListener(this);
button2.addActionListener(this); }
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==button1)
{text1.setText("ok");
}
else if(e.getSource()==button2)
{
p2.removeAll();
}
}
}
解决方案 »
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