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package txt2;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.*;

public class MyPanel extends Frame implements ActionListener{

TextField tf1;

TextField tf2;

Button button1;

Button button2;

Label lb1;

Label lb2;

public MyPanel(){

GridLayout gl1=new GridLayout(3, 2);

this.setLayout(gl1);

lb1=new Label("摄氏温度(C)");

lb2=new Label("华氏温度(F)");

button1=new Button("转华式(F)");

button2=new Button("转摄氏(C)");

tf1=new TextField(10);

tf2=new TextField(10);

this.add(lb1);

this.add(tf1);

this.add(lb2);

this.add(tf2);

this.add(button1);

this.add(button2);

this.setSize(250, 150);

this.setVisible(true);

button1.addActionListener(this);

button2.addActionListener(this);

tf1.setBounds(10, 30, 100, 25);

tf2.setBounds(130,30, 100, 25);

lb1.setBounds(10, 58, 100, 25);

lb2.setBounds(130, 58, 100, 25);

button1.setBounds(10, 88, 100, 25);

button2.setBounds(130, 88, 100, 25);

}

public static void main(String[] args) {

MyPanel mp=new MyPanel();

mp.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

});

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getSource()==button2){

double sum=Double.parseDouble(tf2.getText());

double answer=(sum-32)*5/9;

tf1.setText(Double.toString(answer));

}

if(e.getSource()==button1){

double sum=Double.parseDouble(tf1.getText());

double answer=sum*9/5+32;

tf2.setText(Double.toString(answer));

}

}

}