| /* |
| * 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(); |
| } |