Java基础知识16:抽象类的概念

看代码

package com.hiyo.HighClass;


//含有抽象方法的类，就是抽象类
abstract class People {
    private String name ;
    private int age ;
    public People(String name, int age) {
        this.setName(name);
        this.setAge(age);
    }//抽象类中的构造方法。
    public String getName(){
        return this.name;
    }
    public int getAge(){
        return this.age ;
    }
    public void setAge(int age) {
        this.age = age ;
    }
    public void setName(String name) {
        this.name = name ;
    }
    public abstract String getInfo() ;
    //抽象方法，抽象类中的抽象方法。
}

class Boy extends People {
    private String school ;
    public Boy(String name, int age, String school) {
        super(name, age) ;
        //子类中调用父类的构造方法
        this.setSchool(school) ;
    }
    public String getSchool() {
        return this.school ;
    }
    public void setSchool(String school) {
        this.school = school ;
    }
    public String getInfo(){
        return super.getName() + " " +
                super.getAge() + " " +
                this.getSchool() ;
    }
}
public class AbstractDemo01 {
    public static void main(String[] args) {
        Boy boy = new Boy("DYJ",30, "NIT");
        System.out.println(boy.getInfo());
    }

}