运用java的基本库类，实现一个计算四则运算的程序

运用java的基本库类，实现一个计算四则运算的程序

package Ex1; //Ex1为包名
import java.util.*;
public class SzYs { //SzYs为类名
public static void main(String[] args){
double num1;
double num2;
String fuHao;
Scanner input = new Scanner(System.in);
System.out.print("输入第一个数的值：");
num1 = input.nextDouble();
System.out.print("输入第二个数的值：");
num2 = input.nextDouble();
System.out.print("输入运算符号（+ - * \\ ）");
fuHao = input.next();
if(fuHao.equals("+")){
System.out.print(num1 + "与" + num2 + "的和是" + (num1+num2));
}else if(fuHao.equals("-")){
System.out.print(num1 + "与" + num2 + "的差是" + (num1-num2));
}else if(fuHao.equals("8")){
System.out.print(num1 + "与" + num2 + "的积是" + (num1*num2));
}else if(fuHao.equals("\\")){
if(num2==0){
System.out.print("除数不能为0");
}else{
System.out.print(num1 + "与" + num2 + "的商是" + (num1/num2));
}
}else{
System.out.print("不能辨认该符号");
}
}
}