简单计算器

写个计算器，能完成加减乘除运算，定义接口做参数，加减乘除定义4个类 定义⼀个静态工具类，把下面的接口作为其中⼀个形参对象，传递具体的运算符类完成计算.

interface ICompute{
    int computer(int num1, int num2);
}
public class AddOper implements ICompute {
    @Override
    public int computer(int num1, int num2) {
        return num1 + num2;
    }
}
public class SubOper implements ICompute {
    @Override
    public int computer(int num1, int num2) {
        return num1 - num2;
    }
}
public class MulOper implements ICompute {
    @Override
    public int computer(int num1, int num2) {
        return num1*num2;
    }
}
public class DivideOper implements ICompute {
    @Override
    public int computer(int num1, int num2) {
        try {
            return num1/num2;
        }catch (Exception e){
            e.printStackTrace();
        }
        return -1;
    }
}
public class UseCompute {
    public static void compute(ICompute compute, int num1, int num2){
        int result = compute.computer(num1,num2);
        System.out.println(result);
    }
//    public static void add(AddOper compute, int num1, int num2){
//
//        int result = compute.computer(num1,num2);
//        System.out.println(result);
//    }
//
//    public static void sub(SubOper compute, int num1, int num2){
//
//        int result = compute.computer(num1,num2);
//        System.out.println(result);
//    }
    public static void main(String [] args){
        UseCompute.compute(new AddOper(),25,5);
        UseCompute.compute(new SubOper(),25,5);
        UseCompute.compute(new MulOper(),25,5);
        UseCompute.compute(new DivideOper(),25,0);
    }

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