content: /*
   * Copyright (C) 2007 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /**
   * Return stuff.
   */
  public class Main {
      public static void main(String[] args) {
  
          System.out.println("pick 1");
          pickOne(1).run();
          System.out.println(((CommonInterface)pickOne(1)).doStuff());
  
          System.out.println("pick 2");
          pickOne(2).run();
          System.out.println(((CommonInterface)pickOne(2)).doStuff());
  
          System.out.println("pick 3");
          pickOne(3).run();
      }
  
      public static Runnable pickOne(int which) {
          Runnable runme;
  
          if (which == 1)
              runme = new ClassOne();
          else if (which == 2)
              runme = new ClassTwo();
          else if (which == 3)
              runme = new ClassThree();
          else
              runme = null;
  
          return runme;
      }
  }
  
  class ClassOne implements CommonInterface, Runnable {
      public void run() {
          System.out.println("one running");
      }
      public int doStuff() {
          System.out.println("one");
          return 1;
      }
  }
  
  class ClassTwo implements CommonInterface, Runnable {
      public void run() {
          System.out.println("two running");
      }
      public int doStuff() {
          System.out.println("two");
          return 2;
      }
  }
  
  class ClassThree implements Runnable {
      public void run() {
          System.out.println("three running");
      }
  }
  
  interface CommonInterface {
      int doStuff();
  }
  