java之方法的重写
方法的重写:
1、在子类中可以根据需要对从基类中继承来的方法进行重写。
2、重写的方法和被重写的方法必须具有相同方法名称、参数列表和返回类型。
3、重写方法不能使用比被重写的方法更严格的访问权限。
程序code:
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;
}
public String getInfo(){
return "Name is:"+name+",Age is "+age;
}
}
class Student extends Person{
private String school;
public void setSchool(String school){
this.school = school;
}
public String getSchool(){
return school;
}
public String getInfo(){
return "Name is:"+getName()+",Age is "+getAge()+",School is:"+school;
}
}
public class TestOverRide{
public static void main (String args[]){
Student student = new Student();
Person person = new Person();
person.setAge(1000);
person.setName("lili");
student.setAge(23);
student.setName("vic");
student.setSchool("shnu");
System.out.println(person.getInfo());
System.out.println(student.getInfo());
}
}
执行结果:
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