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 public class Main {
main(String[] args)18     public static void main(String[] args) {
19         // Reserve around 1/4 of the RAM for keeping objects live.
20         long maxMem = Runtime.getRuntime().maxMemory();
21         Object[] holder = new Object[(int)maxMem / 16];
22         int count = 0;
23         try {
24             while (true) {
25                 holder[count++] = new Object[1025];  // A bit over one page.
26             }
27         } catch (OutOfMemoryError e) {}
28         for (int i = 0; i < count; ++i) {
29             holder[i] = null;
30         }
31         // Make sure the heap can handle allocating large object array. This makes sure that free
32         // pages are correctly coalesced together by the allocator.
33         holder[0] = new Object[(int)maxMem / 8];
34     }
35 }
36