class Person{
private int age;
private String name;
public void setAge(int age){
this.age=age;
}
public void setName(String name ){
this.name=name;
}
public int getAge(){
return age;
}
public String getName(){
return name;
}
protected String getInfo(){
return "age:"+getAge()+"\nname:"+getName();
}
}
class Student extends Person{
private String school;
public void setSchool(String school){
this.school=school;
}
public String getSchool(){
return school;
}
protected String getInfo(){
return "age:"+getAge()+"\nname:"+getName()+"\nschool:"+getSchool();
}
}
public class TestOverWrite{
public static void main(String arg[]){
Student student =new Student() ;
Person person=new Person();
person.setAge(44);
person.setName("hn");
student.setAge(44);
student.setName("hn");
student.setSchool("jin");
System.out.println(person.getInfo());
System.out.println(student.getInfo());
}
}
private int age;
private String name;
public void setAge(int age){
this.age=age;
}
public void setName(String name ){
this.name=name;
}
public int getAge(){
return age;
}
public String getName(){
return name;
}
protected String getInfo(){
return "age:"+getAge()+"\nname:"+getName();
}
}
class Student extends Person{
private String school;
public void setSchool(String school){
this.school=school;
}
public String getSchool(){
return school;
}
protected String getInfo(){
return "age:"+getAge()+"\nname:"+getName()+"\nschool:"+getSchool();
}
}
public class TestOverWrite{
public static void main(String arg[]){
Student student =new Student() ;
Person person=new Person();
person.setAge(44);
person.setName("hn");
student.setAge(44);
student.setName("hn");
student.setSchool("jin");
System.out.println(person.getInfo());
System.out.println(student.getInfo());
}
}
this.name=name;
}
this.name=name;从这句话可以看出,setName()的功能是把你传给他的name赋给Person的成员name,如果是空参数的话就不能达到setName()的目的了