interface Target{
  void method1();
  void method2(); //期待得到该方法
}
//源类中不具备method2中的方法。
class Adaptee{
  public void method1(){
    System.out.println("method1");
  }
}

class Adapter extends Adaptee implements Target{

  @Override
  public void method2() {
    System.out.println("this is target method");
  }

}

public class MainTest {

  public static void main(String arg[]) {
    Target target = new Adapter();
    target.method2();
  }
}

interface Target{
  void method1();
  void method2();
}

class Adaptee{
  public void method1(){
    System.out.println("method1");
  }
}

class Adapter implements Target{

  private Adaptee adaptee;

  public Adapter(Adaptee adaptee){
    this.adaptee = adaptee;
  }

  @Override
  public void method2() {
    System.out.println("this is target method");
  }

  @Override
  public void method1() {
    // TODO Auto-generated method stub
    adaptee.method1();
  }

}

public class MainTest {

  public static void main(String arg[]) {
    Target target = new Adapter(new Adaptee());
    target.method2();
  }
}