课后作业2

1.编写一个程序，用户输入两个数，求出其加减乘除，并用消息框显示计算结果。

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));

    }