Java第五次作业

class Person4{
    private String name;
    private String addr;
    private String sex;
    private int age;
    public Person4(String name,String addr,String sex,int age){
        this.name=name;
        this.addr=addr;
        this.sex=sex;
        this.age=age;
    }
    public Person4(String name,int age){
        this.name=name;
        this.age=age;
    }
    public Person4(){
        
    }
    public String getName(){
        return name;
    }
    public void setName(String n){
        name=n;
    }
    public String getAddr(){
        return addr;
    }
    public void setAddr(String ad){
        addr=ad;
    }
    public String getSex(){
        return sex;
    }
    public void setSex(String s){
        sex=s;
    }
    public int getAge(){
        return age;
    }
    public void setAge(int a){
        age=a;
    }
}
class Chidren2 extends Person4{
    private float math;
    private float english;
    public Chidren2(){
    }
    public float getMath(){
        return math;
    }
    public void setMath(float math){
        this.math=math;
    }
    public float getEnglish(){
        return english;
    }
    public void setEnglish(float english){
        this.english=english;
    }
}
public class ExtDemo {
    public static void main(String args[]) {
        Chidren2 stu=new Chidren2();
        stu.setName("张三");
        stu.setAddr("北京市顺义区牛栏山镇北京工业大学耿丹学院");
        stu.setSex("女");
        stu.setAge(20);
        stu.setMath(98.5f);
        stu.setEnglish(90.5f);
        System.out.println("姓名:"+stu.getName());
        System.out.println("地址:"+stu.getAddr());
        System.out.println("性别:"+stu.getSex());
        System.out.println("年龄:"+stu.getAge());
        System.out.println("数学成绩:"+stu.getMath());
        System.out.println("英语成绩:"+stu.getEnglish());
        System.out.println("\t");
        stu=new Chidren2();
        stu.setName("张三");
        stu.setAge(20);
        System.out.println("姓名:"+stu.getName());
        System.out.println("地址:"+stu.getAddr());
        System.out.println("性别:"+stu.getSex());
        System.out.println("年龄:"+stu.getAge());
        System.out.println("数学成绩:"+stu.getMath());
        System.out.println("英语成绩:"+stu.getEnglish());
        System.out.println("\t");
        stu=new Chidren2();
        System.out.println("姓名:"+stu.getName());
        System.out.println("地址:"+stu.getAddr());
        System.out.println("性别:"+stu.getSex());
        System.out.println("年龄:"+stu.getAge());
        System.out.println("数学成绩:"+stu.getMath());
        System.out.println("英语成绩:"+stu.getEnglish());
    }

}

class Person3{
    private String name;
    private String addr;
    private String sex;
    private int age;
    public Person3(String name,String addr,String sex,int age){
        this.name=name;
        this.addr=addr;
        this.sex=sex;
        this.age=age;
    }
    public Person3(String name,int age){
        this.name=name;
        this.age=age;
    }
    public Person3(){
        
    }
    public String getName(){
        return name;
    }
    public void setName(String n){
        name=n;
    }
    public String getAddr(){
        return addr;
    }
    public void setAddr(String ad){
        addr=ad;
    }
    public String getSex(){
        return sex;
    }
    public void setSex(String s){
        sex=s;
    }
    public int getAge(){
        return age;
    }
    public void setAge(int a){
        age=a;
    }
}
public class Person {
    public static void main(String args[]) {
        Person3 per=null;
        per=new Person3("张三","北京市顺义区牛栏山镇北京工业大学耿丹学院","男",20);
        System.out.println("姓名:"+per.getName());
        System.out.println("地址:"+per.getAddr());
        System.out.println("性别:"+per.getSex());
        System.out.println("年龄:"+per.getAge());
        System.out.println("\t");
        per=new Person3("张三",20);
        System.out.println("姓名:"+per.getName());
        System.out.println("地址:"+per.getAddr());
        System.out.println("性别:"+per.getSex());
        System.out.println("年龄:"+per.getAge());
        System.out.println("\t");
        per=new Person3();
        System.out.println("姓名:"+per.getName());
        System.out.println("地址:"+per.getAddr());
        System.out.println("性别:"+per.getSex());
        System.out.println("年龄:"+per.getAge());
    }
}