1. source
package jisuanqi2;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Jisuanqi extends Frame implements ActionListener{
public Jisuanqi() {
super("计算器");
Frame ff=new Frame("framework test");
ff.setSize(400,100);
ff.setLocation(300,240);
ff.setLayout(new FlowLayout());
final TextField f1=new TextField("10",8);
ff.add(f1);
//this.add(new Label("+"));
Label l1=new Label("+");
ff.add(l1);
//this.add(new TextField("20",8));
TextField f2=new TextField("20",8);
ff.add(f2);
//this.add(new Button("="));
Button b1=new Button("=");
ff.add(b1);
//this.add(new TextField(10));
TextField f3=new TextField(10);
ff.add(f3);
ff.addWindowListener(new myclose());
ff.setVisible(true);
b1.addActionListener(new ActionListener()
{public void actionPerformed(ActionEvent e)
{double c;
String s1=f1.getText();
double a=Integer.parseInt(s1);
String s2=f2.getText();
double b=Integer.parseInt(s2);
c=a+b;
String m=String.valueOf(c);
f3.setText(m);
}
private double Integer(String s) {
return 0;
}
});
}
class myclose implements WindowListener{
public void windowActivated(WindowEvent arg0) {
}
public void windowClosed(WindowEvent arg0) {
// TODO Auto-generated method stub
}
public void windowClosing(WindowEvent arg0) {
System.exit(0);
}
public void windowDeactivated(WindowEvent arg0) {
}
public void windowDeiconified(WindowEvent arg0) {
}
public void windowIconified(WindowEvent arg0) {
}
public void windowOpened(WindowEvent arg0) {
}
}
public static void main(String[] args) {
Jisuanqi new new ();
}
public void actionPerformed(ActionEvent arg0) {
}
}
2. Experimental results
3. Experimental experience:
The experimental add new features based on previous experiments to be implemented as control plus monitoring the achievement drive. I encountered many problems during the preparation process, but solved with the help of students. Mastery of knowledge of the graphical interface is not enough skilled, later also need to strengthen training.