课后作业

import javax.swing.JOptionPane;

public class Da{

 

   public static void main(String[] args) {

    int n1=Integer.parseInt(JOptionPane.showInputDialog("Input number 1: "));

    int n2=Integer.parseInt(JOptionPane.showInputDialog("Input number 2: ")) ;   //获取从JOptionPane.showInputDialog对话框中输入的值，然后转换为int类型

    JOptionPane.showMessageDialog(null,"The sum is:"+(n1+n2)

          +"\n"+"The difference is:"+(n1-n2)

          +"\n"+"The product is:"+(n1*n2)

          +"\n"+"The division is:"+(n1/n2));

    }

public class Test1{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = null;
        while((str=scanner.nextLine())!=null){
        if(str.equals("exit")){    
                    break;}
    System.out.println(str);}
                        }
        }