用继承的，已经实现了，没有什么参考答案，所以代码也没有改进。
这里不写继承的，那个似乎比较简单。就是 people,teacher,student,headTeacher一溜的继承，然后创建一个school，里面有老师，学生，班主任，然后科目什么的。
用组合关系，有点没理清楚要怎么具体的去写。。。大概写了个框架
package chapter5.test;
class People{
private String name;
public void introduction(){
System.out.println("name:"+name);
}
public People(String name){
this.name=name;
}
}
class HeadTeacher extends People{
private String subject;
public String getSubject(){
return subject;
}
public HeadTeacher(String name,String subject){
super(name);
this.subject=subject;
}
public void teaching(){
System.out.println("teaching "+getSubject());
}
public void introduction(){
super.introduction();
System.out.println("subject:"+getSubject());
}
}
class School{
//学校由 老师，学生，学科等组成
//学校需要调用老师的teaching方法，学生的study方法等等
private String name;
HeadTeacher ht;
public School(String name,HeadTeacher ht){
this.name=name;
this.ht=ht;
}
public void introduction(){
System.out.println("学校名称："+name);
}
public void teaching(){
ht.teaching();
}
}
public class TestConbination {
public static void main(String[]args){
People p =new People("张三");
HeadTeacher ht =new HeadTeacher("李四","物理");
ht.introduction();
ht.teaching();
p.introduction();
System.out.println("---------");
School sch=new School("张家口学校",ht);
sch.introduction();
sch.teaching();
}
}
