编程实现Person类，学生类的设计及其继承关系
（同第六章课后第三题）
class Person{
private String name;
private String addr;
private String sex;
private int age;
public Person(){
System.out.println("声明一个人类");
}
public Person(String name,String addr){
this();
this.name=name;
this.addr=addr;
}
public Person(String name,String addr,String sex,int age){
this(name,addr);
this.sex=sex;
this.age=age;
}
public String getName(){
return this.name;
}
public String getAddr(){
return this.addr;
}
public String getSex(){
return this.sex;
}
public int getAge(){
return this.age;
}
public void print(){
System.out.println("人类信息----->姓名:"+this.getName()+"; 地址:"+this.getAddr()+"; 性别:"+this.getSex()+"; 年龄:"+this.getAge());
}
}
class Student extends Person{
private float math;
private float english;
public Student(){
super();
System.out.println("此人是个学生");
}
public Student(String name,String addr){
super(name,addr);
}
public Student(String name,String addr,String sex,int age,float math,float english){
super(name,addr,sex,age);
this.math=math;
this.english=english;
}
public void print(){
System.out.println("学生信息----->姓名:"+this.getName()+"; 地址:"+this.getAddr()+"; 性别:"+this.getSex()+"; 年龄:"+this.getAge()+"; 数学成绩:"+this.math+"; 英语成绩:"+this.english);
}
}
public class Person01{
public static void main(String args[]){
Person per1=null;
Person per2=null;
per1=new Person("张三","河北保定","男",30);
per2=new Student("张小三","河北保定","男",15,88.0f,77.0f);
per1.print();
per2.print();
}
}