| /* |
| * Copyright (c) 2000, 2004, 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 4242309 4982981 |
| * @summary Test equals and contentEquals in String |
| * @key randomness |
| */ |
| import java.util.Random; |
| import java.nio.CharBuffer; |
| |
| // Yes, I used cut and paste for this test. Yes more code |
| // sharing could have been accomplished. |
| public class ContentEquals { |
| |
| private static Random rnd = new Random(); |
| private static final int ITERATIONS = 1000; |
| private static final int STR_LEN = 20; |
| |
| public static void main(String[] args) throws Exception { |
| testStringBuffer(); |
| testStringBuilder(); |
| testString(); |
| testCharSequence(); |
| } |
| |
| // Test a StringBuffer, which uses the old method from 1.4 |
| public static void testStringBuffer() throws Exception { |
| for (int i=0; i<ITERATIONS; i++) { |
| int length = rnd.nextInt(STR_LEN) + 1; |
| StringBuffer testStringBuffer = new StringBuffer(); |
| for(int x=0; x<length; x++) { |
| char aChar = (char)rnd.nextInt(); |
| testStringBuffer.append(aChar); |
| } |
| String testString = testStringBuffer.toString(); |
| char c = testStringBuffer.charAt(0); |
| testStringBuffer.setCharAt(0, 'c'); |
| testStringBuffer.setCharAt(0, c); |
| if (!testString.contentEquals(testStringBuffer)) |
| throw new RuntimeException("ContentsEqual failure"); |
| } |
| } |
| |
| // Test StringBuilder as a CharSequence using new method in 1.5 |
| public static void testStringBuilder() throws Exception { |
| for (int i=0; i<ITERATIONS; i++) { |
| int length = rnd.nextInt(STR_LEN) + 1; |
| StringBuilder testStringBuilder = new StringBuilder(); |
| for(int x=0; x<length; x++) { |
| char aChar = (char)rnd.nextInt(); |
| testStringBuilder.append(aChar); |
| } |
| String testString = testStringBuilder.toString(); |
| char c = testStringBuilder.charAt(0); |
| testStringBuilder.setCharAt(0, 'c'); |
| testStringBuilder.setCharAt(0, c); |
| if (!testString.contentEquals(testStringBuilder)) |
| throw new RuntimeException("ContentsEqual failure"); |
| } |
| } |
| |
| // Test a String as a CharSequence. This takes a different codepath in |
| // the new method in 1.5 |
| public static void testString() throws Exception { |
| for (int i=0; i<ITERATIONS; i++) { |
| int length = rnd.nextInt(STR_LEN) + 1; |
| StringBuilder testStringBuilder = new StringBuilder(); |
| for(int x=0; x<length; x++) { |
| char aChar = (char)rnd.nextInt(); |
| testStringBuilder.append(aChar); |
| } |
| String testString = testStringBuilder.toString(); |
| char c = testStringBuilder.charAt(0); |
| testStringBuilder.setCharAt(0, 'c'); |
| testStringBuilder.setCharAt(0, c); |
| if (!testString.contentEquals(testStringBuilder.toString())) |
| throw new RuntimeException("ContentsEqual failure"); |
| } |
| } |
| |
| // Test a CharSequence that is not an AbstractStringBuilder, |
| // this takes a different codepath in the new method in 1.5 |
| public static void testCharSequence() throws Exception { |
| for (int i=0; i<ITERATIONS; i++) { |
| int length = rnd.nextInt(STR_LEN) + 1; |
| StringBuilder testStringBuilder = new StringBuilder(); |
| for(int x=0; x<length; x++) { |
| char aChar = (char)rnd.nextInt(); |
| testStringBuilder.append(aChar); |
| } |
| String testString = testStringBuilder.toString(); |
| char c = testStringBuilder.charAt(0); |
| testStringBuilder.setCharAt(0, 'c'); |
| testStringBuilder.setCharAt(0, c); |
| CharBuffer buf = CharBuffer.wrap(testStringBuilder.toString()); |
| if (!testString.contentEquals(buf)) |
| throw new RuntimeException("ContentsEqual failure"); |
| } |
| } |
| } |