Java代码复用的三种常用方式：继承、组合和代理(1)

public class Wangxiaosan extends Wangsan {
  public Wangxiaosan() {
  System.out.println("我是新类王小三");
  setName("王老三");
  System.out.println(getName());
  }
  public static void main(String[] args) {
  new Wangxiaosan();
  }
}
class Wangsan {
  private String name;
  Wangsan() {
  System.out.println("我是基类王三");
  }
  public String getName() {
  return name;
  }
  public void setName(String name) {
  this.name = name;
  }
}

public class Tongxiangyu {
  private Baizhantang boyFriend = new Baizhantang();
  public Tongxiangyu() {
    System.out.println("我是同福客栈的掌柜佟湘玉");
    boyFriend.pointHand("郭芙蓉");
  }
  public static void main(String[] args) {
    new Tongxiangyu();
  }
}
class Baizhantang {
  Baizhantang() {
    System.out.println("我是退隐江湖的盗圣白展堂");
  }
  public void pointHand(String name) {
    System.out.println("那谁" + name + "，准备一下——葵花点穴手");
  }
}