用Java写定义两个整数x为27 y为6 从键盘输入算数运算符分别对x和y进行算术运算 并打印输出运算结果

可以使用以下代码完成该要求：

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner input = new Scanner(System.in); // 创建一个Scanner对象
int x = 27;
int y = 6;
System.out.print("请输入一个算术运算符：");
String operator = input.nextLine(); // 从键盘读取用户输入的算术运算符
switch (operator) {
case "+":
System.out.println(x + " + " + y + " = " + (x + y));
break;
case "-":
System.out.println(x + " - " + y + " = " + (x - y));
break;
case "*":
System.out.println(x + " * " + y + " = " + (x * y));
break;
case "/":
System.out.println(x + " / " + y + " = " + (x / y));
break;
default:
System.out.println("不是有效的算术运算符！");
}
}

}

输出结果：

请输入一个算术运算符：*
27 * 6 = 162