70 lines
2.3 KiB
Java
70 lines
2.3 KiB
Java
/*
|
|
* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
import sun.hotspot.WhiteBox;
|
|
|
|
public class HelloStringGC {
|
|
public static String[] array01 = new String[1000];
|
|
public static String[] array02 = new String[1000];
|
|
|
|
public static void main(String args[]) throws RuntimeException {
|
|
String testString1 = "shared_test_string_unique_14325";
|
|
String testString2 = "test123";
|
|
|
|
WhiteBox wb = WhiteBox.getWhiteBox();
|
|
if (!wb.isShared(testString1) && !wb.areSharedStringsIgnored()) {
|
|
throw new RuntimeException("testString1 is not shared");
|
|
}
|
|
|
|
for (int i=0; i<5; i++) {
|
|
allocSomeStrings(testString1, testString2);
|
|
array01 = null;
|
|
array02 = null;
|
|
System.gc();
|
|
sleep(300);
|
|
array01 = new String[1000];
|
|
array02 = new String[1000];
|
|
}
|
|
|
|
wb.fullGC();
|
|
|
|
System.out.println("HelloStringGC: PASS");
|
|
}
|
|
|
|
private static void allocSomeStrings(String s1, String s2) {
|
|
for (int i = 0; i < 1000; i ++) {
|
|
array01[i] = new String(s1);
|
|
array02[i] = new String(s2);
|
|
}
|
|
}
|
|
|
|
private static void sleep(int ms) {
|
|
try {
|
|
Thread.sleep(ms);
|
|
} catch (InterruptedException e) {
|
|
}
|
|
}
|
|
|
|
}
|