题目内容

interface Com {int n=3;int compute(int a);}class A implements Com {int n=5;public int compute (int a){return a+n;}}class B implements Com{public int compute (int a) {return a-n;}}public class E {public static void main(String args[]) {Com com = new A();System.out.println(com. compute (10));com= new B();System.out.println(com. compute (10));}}运行结果：

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