import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class ShowTextFrame extends JFrame implements ActionListener{
   JTextField myField1=new JTextField(10);
   JTextField myField2=new JTextField(10);
   JTextField myField3=new JTextField(20);
   JButton okButton=new JButton("求和")；
   JLabel myLabel1=new JLabel("請(qǐng)輸入兩個(gè)整數(shù):       ");
   JLabel myLabel2=new JLabel("你所輸入的兩個(gè)整數(shù)的和是:  ");

   public ShowTextFrame(){
      super("顯示文本信息");
      setSize(300,150);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      Container pane=getContentPane();
      FlowLayout flo=new FlowLayout(FlowLayout.CENTER,10,10);
      pane.setLayout(flo);

      okButton.addActionListener(this);
      pane.add(myLabel1);
      pane.add(myField1);
      pane.add(myField2);
          pane.add(okButton);
          pane.add(myLabel2);
          pane.add(myField3);
          setVisible(true);
          setContentPane(pane);
    }

   public void actionPerformed(ActionEvent e){
     if(e.getSource()==okButton){
          String str1=myField1.getText();
          String str2=myField2.getText();
          int x=Integer.parseInt(str1);
          int y=Integer.parseInt(str2);
          int z=x+y;
          String str3=String.valueOf(z);
          myField3.setText(str3); 
     }
   }
}
public class TestA3{
  public static void main(String arguments[]){
     ShowTextFrame myFrame=new ShowTextFrame();
  }
}