封装和继承

•创建Person类，添加属性姓名name和年龄age

•创建Student类(有分数属性)，继承Person类,并设置get和set方法对name和age赋值

•创建Demo类，实例化Student类并在控制台打印姓名name、年龄age和分数score的值

 

package emp20901;
 class Person
 {
  private int age;
  private String name;
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 }
     class Student extends Person
     {
      private int score;

  public int getScore() {
   return score;
  }

  public void setScore(int score) {
   this.score = score;
  }
     }
public class Demo {

 public static void main(String[] args) {
  // TODO Auto-generated method stub
        Student s=new Student();
        s.setAge(15);
        s.setName("小明");
        s.setScore(60);
        System.out.println("age="+s.getAge()+"\n"+"name="+s.getName()+"\n"+"score="+s.getScore());
       
 }
      
}