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 Test{
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));
}
}
结果截屏：