1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.lang.reflect.Method; 18 19 public class DefaultDeclared { 20 interface DefaultInterface { sayHi()21 default void sayHi() { 22 System.out.println("hi default"); 23 } 24 } 25 26 interface RegularInterface { sayHi()27 void sayHi(); 28 } 29 30 class ImplementsWithDefault implements DefaultInterface {} 31 32 class ImplementsWithDeclared implements DefaultInterface { sayHi()33 public void sayHi() { 34 System.out.println("hello specific from default"); 35 } 36 } 37 38 abstract class UnimplementedWithRegular implements RegularInterface { } 39 40 class ImplementsWithRegular implements RegularInterface { sayHi()41 public void sayHi() { 42 System.out.println("hello specific"); 43 } 44 } 45 printGetMethod(Class<?> klass)46 private static void printGetMethod(Class<?> klass) { 47 Method m; 48 try { 49 m = klass.getDeclaredMethod("sayHi"); 50 System.out.println("No error thrown for class " + klass.toString()); 51 } catch (NoSuchMethodException e) { 52 System.out.println("NoSuchMethodException thrown for class " + klass.toString()); 53 } catch (Throwable t) { 54 System.out.println("Unknown error thrown for class " + klass.toString()); 55 t.printStackTrace(System.out); 56 } 57 } 58 test()59 public static void test() { 60 System.out.println("=============================="); 61 System.out.println("Are These Methods found by getDeclaredMethod:"); 62 System.out.println("=============================="); 63 64 printGetMethod(DefaultInterface.class); 65 printGetMethod(RegularInterface.class); 66 printGetMethod(ImplementsWithDefault.class); 67 printGetMethod(ImplementsWithDeclared.class); 68 printGetMethod(ImplementsWithRegular.class); 69 printGetMethod(UnimplementedWithRegular.class); 70 } 71 } 72