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()); } }