java静态代理的含义及用法

public interface Sell {
    void sell();
    void ad();
}

public class Stars implements IStars{
  private String name;

  public Stars(String name) {
    this.name = name;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public void sing(){
    System.out.println(getName() + " 唱了一首歌.");
  }

  public void dance(){
    System.out.println(getName() + " 跳了一支舞.");
  }
}

public interface IStars {
  void sing();
  void dance();
}