38.利用接口做参数,写个计算器,能完成+-*/运算 (1)定义一个接口Compute含有一个方法int computer(int n,int m); (2)设计四个类分别实现此接口,完成+-*/运算 (3)设计一个类UseCompute,含有方法: public void useCom(Compute com, int one, int two) 此方法要求能够:1.用传递过来的对象调用comp
//接口Compute
package jieKou;
public interface Compute {
int Computer(int n,int m);
}
//加
package jieKou;
public class Jia implements Compute {
@Override
public int Computer(int n, int m) {
// TODO 自动生成的方法存根
return m+n;
}
}
//减
package jieKou;
public class Jian implements Compute {
@Override
public int Computer(int n, int m) {
// TODO 自动生成的方法存根
return n-m;
}
}
//乘
package jieKou;
public class Cheng implements Compute {
@Override
public int Computer(int n, int m) {
// TODO 自动生成的方法存根
return n*m;
}
}
//除
package jieKou;
public class Chu implements Compute {
@Override
public int Computer(int n, int m) {
// TODO 自动生成的方法存根
return n/m;
}
}
//UseCompute
package jieKou;
public class UseCompute {
public void useCom(Compute com, int one, int two)
{
System.out.println(com.Computer(one, two));
}
}
//测试类
package jieKou;
public class Test001 {
public static void main(String[] args) {
UseCompute a=new UseCompute();
a.useCom(new Jia(), 5, 6);
a.useCom(new Jian(), 5, 6);
a.useCom(new Cheng(), 5, 6);
a.useCom(new Chu(), 30, 6);
}
}
///运行结果
11
-1
30
5