| /* |
| * Copyright (c) 2012, 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 6206780 |
| * @summary Test StringBuilder.append(StringBuffer); |
| */ |
| |
| import java.util.Random; |
| |
| public class AppendStringBuffer { |
| private static Random generator = new Random(); |
| |
| public static void main(String[] args) throws Exception { |
| for (int i=0; i<1000; i++) { |
| StringBuffer sb1 = generateTestBuffer(10, 100); |
| StringBuffer sb2 = generateTestBuffer(10, 100); |
| StringBuffer sb3 = generateTestBuffer(10, 100); |
| String s1 = sb1.toString(); |
| String s2 = sb2.toString(); |
| String s3 = sb3.toString(); |
| |
| String concatResult = new String(s1+s2+s3); |
| |
| StringBuilder test = new StringBuilder(); |
| test.append(sb1); |
| test.append(sb2); |
| test.append(sb3); |
| |
| if (!test.toString().equals(concatResult)) |
| throw new RuntimeException("StringBuffer.append failure"); |
| } |
| } |
| |
| private static int getRandomIndex(int constraint1, int constraint2) { |
| int range = constraint2 - constraint1; |
| int x = generator.nextInt(range); |
| return constraint1 + x; |
| } |
| |
| private static StringBuffer generateTestBuffer(int min, int max) { |
| StringBuffer aNewStringBuffer = new StringBuffer(120); |
| int aNewLength = getRandomIndex(min, max); |
| for(int y=0; y<aNewLength; y++) { |
| int achar = generator.nextInt(30)+30; |
| char test = (char)(achar); |
| aNewStringBuffer.append(test); |
| } |
| return aNewStringBuffer; |
| } |
| } |