泛型

interface Info{		// 只有此接口的子类才是表示人的信息
}
class Contact implements Info{	// 表示联系方式
	private String address ;	// 联系地址
	private String telphone ;	// 联系方式
	private String zipcode ;	// 邮政编码
	public Contact(String address,String telphone,String zipcode){
		this.setAddress(address) ;
		this.setTelphone(telphone) ;
		this.setZipcode(zipcode) ;
	}
	public void setAddress(String address){
		this.address = address ;
	}
	public void setTelphone(String telphone){
		this.telphone = telphone ;
	}
	public void setZipcode(String zipcode){
		this.zipcode = zipcode ;
	}
	public String getAddress(){
		return this.address ;
	}
	public String getTelphone(){
		return this.telphone ;
	}
	public String getZipcode(){
		return this.zipcode ;
	}
	public String toString(){
		return "联系方式：" + "n" +
				"t|- 联系电话：" + this.telphone + "n" + 
				"t|- 联系地址：" + this.address + "n" + 
				"t|- 邮政编码：" + this.zipcode ;
	}
};
class Introduction implements Info{
	private String name ;		// 姓名
	private String sex ;		// 性别
	private int age ;			// 年龄
	public Introduction(String name,String sex,int age){
		this.setName(name) ;
		this.setSex(sex) ;
		this.setAge(age) ;
	}
	public void setName(String name){
		this.name = name ;
	}
	public void setSex(String sex){
		this.sex = sex ;
	}
	public void setAge(int age){
		this.age = age ;
	}
	public String getName(){
		return this.name ;
	}
	public String getSex(){
		return this.sex ;
	}
	public int getAge(){
		return this.age ;
	}
	public String toString(){
		return "基本信息：" + "n" +
				"t|- 姓名：" + this.name + "n" + 
				"t|- 性别：" + this.sex + "n" + 
				"t|- 年龄：" + this.age ;
	}
};
class Person<T extends Info>{
	private T info ;
	public Person(T info){		// 通过构造方法设置信息属性内容
		this.setInfo(info);
	}
	public void setInfo(T info){
		this.info = info ;
	}
	public T getInfo(){
		return this.info ;
	}
	public String toString(){	// 覆写Object类中的toString()方法
		return this.info.toString() ;
	}
};
public class GenericsDemo33{
	public static void main(String args[]){
		Person<Introduction> per = null ;		// 声明Person对象
		per = new Person<Introduction>(new Introduction("李兴华","男",30)) ;
		System.out.println(per) ;
	}
};