java實現計算

package text;

public interface Computer {
    public int computer(int n,int m);
}

package text;

public class plus implements Computer {
      public int computer(int n,int m) {
        return   n+m;   
    }
}

package text;

public class JIAN implements Computer{
      public int computer(int n,int m) {
            return n-m; 
        }
}

package text;

public class CHENG implements Computer{
      public int computer(int n,int m) {
            return n*m; 
        }
}

package text;

public class CHU implements Computer{
      public int computer(int n,int m) {
            return  n/m;    
        }
}

package text;

public class UseComputer  {
      public void UseComputer(Computer com,int one, int two){
          int x =com.computer(one, two);
            System.out.println("運算的結果爲："+x);                        
      }
}

package text;

public class Test {
    public static void main(String[] args) {
        UseComputer uc=new UseComputer();
        int one =20;
        int two =2;
        Computer plus=new plus();
        Computer jian=new JIAN();
        Computer cheng=new CHENG();
        Computer chu=new CHU();
        uc.UseComputer(plus, one, two);
        uc.UseComputer(jian, one, two);
        uc.UseComputer(cheng, one, two);
        uc.UseComputer(chu, one, two);
    }   

}