/**

* 继承

*/

public class Extends {

public static void main(String[] args) {

Student s1 = new Student("张三", 1);

System.out.println(s1.getInfo());

}

}

class Person {

protected String name;

public Person(String name) {

this.name = name;

}

public String getName() {

return this.name;

}

public void setName(String name) {

this.name = name;

}

}

class Student extends Person {

private int _grade;

public Student(String name, int grade) {

super(name);

// this.name = name; //err

this._grade = grade;

}

public String getInfo() {

// return super.name + ":" + this._grade;

return this.name + ":" + this._grade;

}

// 重写

@Override

public void setName(String name) {

this.name = "student:" + name;

}

// 重载

public void setName(String firstName, String lastName) {

this.name = "student: " + firstName + " " + lastName;

}

}