继承的小DEMO

代码如下
Student.java
package four.com;

public class Student extends Person {

// private String name;
// private int age;
public Student(){}
public Student(String name,int age){
this.setName(name);
this.setAge(age);
}
// public String getName() {
// return name;
// }
// public void setName(String name) {
// this.name = name;
// }
// public int getAge() {
// return age;
// }
// public void setAge(int age) {
// this.age = age;
// }
// public void eat(){
// System.out.println("吃饭！！！！");
// }
// public void walk(){
// System.out.println("走路！！！！！");
// }
//
public void info(){
eat();
System.out.println("我是好人");
}
}

Worker.java
package four.com;

public class Worker extends Person {
// private String name;
// private int age;
//
// public String getName() {
// return name;
// }
// public void setName(String name) {
// this.name = name;
// }
// public int getAge() {
// return age;
// }
// public void setAge(int age) {
// this.age = age;
// }
// public void eat(){
// System.out.println("吃饭！！！！");
// }
// public void walk(){
// System.out.println("走路！！！！！");
// }

}

TestStudent.java
package four.com;

public class TestStudent {

public static void main(String[] args) {
Student s = new Student();
s.eat();
s.info();

Worker ww = new Worker();
ww.eat();
Person p = new Person();
p.eat();

}

}

Person.java
package four.com;

public class Person {
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public void eat(){
System.out.println("吃饭！！！！");
}
public void walk(){
System.out.println("走路！！！！！");
}

}