1 /* 2 * Copyright (C) 2007 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 /** 18 * more instanceof cases 19 */ 20 public class Main { 21 public static void main(String args[]) { 22 Iface1 face1; 23 ImplA aa = new ImplA(); 24 ImplBSub bb = new ImplBSub(); 25 boolean aaOkay, bbOkay; 26 27 face1 = aa; 28 face1 = bb; 29 30 System.out.println("iface1.mFloaty = " + face1.mFloaty + " " + face1.mWahoo); 31 System.out.println("aa.mFloaty = " + aa.mFloaty + " " + aa.mWahoo); 32 System.out.println("bb.mWhoami = " + bb.mWhoami); 33 34 aaOkay = face1 instanceof ImplA; 35 System.out.print("aaOkay (false) = "); 36 System.out.println(aaOkay); 37 bbOkay = face1 instanceof ImplB; 38 System.out.print("bbOkay (true) = "); 39 System.out.println(bbOkay); 40 41 bb = (ImplBSub) face1; 42 try { 43 aa = (ImplA) face1; 44 } 45 catch (ClassCastException cce) { 46 System.out.println("Caught a ClassCastException (expected)"); 47 } 48 49 Iface1[] faceArray; 50 ImplA[] aaArray = new ImplA[5]; 51 ImplBSub[] bbArray = new ImplBSub[5]; 52 53 faceArray = aaArray; 54 faceArray = bbArray; 55 56 System.out.print("instanceof Serializable = "); 57 System.out.println((Object)aaArray instanceof java.io.Serializable); 58 System.out.print("instanceof Cloneable = "); 59 System.out.println((Object)aaArray instanceof java.lang.Cloneable); 60 System.out.print("instanceof Runnable = "); 61 System.out.println((Object)aaArray instanceof java.lang.Runnable); 62 63 aaOkay = faceArray instanceof ImplA[]; 64 System.out.print("aaOkay (false) = "); 65 System.out.println(aaOkay); 66 bbOkay = faceArray instanceof ImplB[]; 67 System.out.print("bbOkay (true) = "); 68 System.out.println(bbOkay); 69 } 70 } 71
