Question

题目级别：助理工程师【适中】

下列类定义中正确使用Data和Info的是哪项？( )

interface Data {public void load();}
abstract class Info {public abstract void load();}

备选答案

public class Employee implements Info extends Data {
    public void load() {/*do something*/}
}

public class Employee extends Inf implements Data {
    public void load() {/*do something*/}
}

public class Employee implements Inf extends Data {
    public void Data.load() {/*do something*/}
    public void load() {/*do something*/}
}

 public class Employee extends Inf implements Data {
    public void Data.load() {/*do something*/}
    public void Info.load() {/*do something*/}
}

解题分析

子类实现接口方法，不需要加"接口前缀."
子类实现抽象方法，不需要加"抽象类前缀."
类要先继承父类再写实现接口