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      1 /*
      2  * Copyright (C) 2017 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.util.Arrays;
     18 
     19 public class Main {
     20   public static void main(String[] args) throws Exception {
     21     doTest();
     22   }
     23 
     24   private static void doTest() throws Exception {
     25     doTest(true, "B");
     26     doTest(false, "A");
     27     System.out.println("Done");
     28   }
     29 
     30   private static void doTest(boolean boot, String className) throws Exception {
     31     ClassLoader expectedClassLoader;
     32     if (boot) {
     33       expectedClassLoader = Object.class.getClassLoader();
     34     } else {
     35       expectedClassLoader = ClassLoader.getSystemClassLoader();
     36     }
     37 
     38     Class<?> c = Class.forName(className, false, ClassLoader.getSystemClassLoader());
     39     if (c.getClassLoader() != expectedClassLoader) {
     40       throw new RuntimeException(className + "(" + boot + "): " +
     41           c.getClassLoader() + " vs " + expectedClassLoader);
     42     } else {
     43       System.out.println(className + " was loaded with " + (boot ? "boot" : "system") +
     44           " classloader");
     45     }
     46   }
     47 }
     48