temperature.java

来自「java课程的资料以及实验的代码」· Java 代码 · 共 49 行

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class myException extends Exception{
  String message;
  public myException(String s){
      message=s;
  }
  public String getMessage(){
    return message;
  }
}

public class Temperature extends JFrame{
  JLabel hsLab=new JLabel("华氏温度");
  JLabel ssLab=new JLabel("摄氏温度");
  JTextField setText=new JTextField();
  JButton b=new JButton("CONVERT");

  public Temperature(){
    Container c=this.getContentPane();
    c.setLayout(new GridLayout(2,2));
    c.add(setText);
    c.add(ssLab);
    c.add(b);
    c.add(hsLab);

    b.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
        try{
          if(Double.parseDouble(setText.getText())<-273.15)
            throw new myException("超出边界!");
          hsLab.setText(String.valueOf(Double.parseDouble(setText.getText())*1.8+32)+"摄氏温度");
        }catch(myException ex){
          hsLab.setText(ex.getMessage());
        }catch(Exception ex1){
          hsLab.setText("请规范你的输入");
        }
      }
    });
    this.setSize(400,200);
    this.show();
  }
  public static void main(String args[]){
     Temperature obj=new Temperature();

  }
}