用jave写一个计算器

可以的，下面是一个简单的例子：

public class Calculator {
public static void main(String[] args) {
int num1 = 10;
int num2 = 5;

System.out.println("加法：" + (num1 + num2));
System.out.println("减法：" + (num1 - num2));
System.out.println("乘法：" + (num1 * num2));
System.out.println("除法：" + (num1 / num2));
}
}