1/* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/** 25 * @test 26 * @bug 6955504 6992121 27 * @summary Test the StringBuilder.ensureCapacity() with negative minimumCapacity 28 * and append() method with negative length input argument. 29 * Also, test the StringBuffer class. 30 */ 31 32import java.util.ArrayList; 33import java.util.Vector; 34 35public class EnsureCapacity { 36 public static void main(String[] args) { 37 testStringBuilder(); 38 testStringBuffer(); 39 } 40 41 private static void checkCapacity(int before, int after) { 42 if (before != after) { 43 throw new RuntimeException("capacity is expected to be unchanged: " + 44 "before=" + before + " after=" + after); 45 } 46 } 47 48 private static void testStringBuilder() { 49 StringBuilder sb = new StringBuilder("abc"); 50 int cap = sb.capacity(); 51 52 // test if negative minimumCapacity 53 sb.ensureCapacity(Integer.MIN_VALUE); 54 checkCapacity(cap, sb.capacity()); 55 56 try { 57 char[] str = {'a', 'b', 'c', 'd'}; 58 // test if negative length 59 sb.append(str, 0, Integer.MIN_VALUE + 10); 60 throw new RuntimeException("IndexOutOfBoundsException not thrown"); 61 } catch (IndexOutOfBoundsException ex) { 62 } 63 } 64 65 private static void testStringBuffer() { 66 StringBuffer sb = new StringBuffer("abc"); 67 int cap = sb.capacity(); 68 69 // test if negative minimumCapacity 70 sb.ensureCapacity(Integer.MIN_VALUE); 71 checkCapacity(cap, sb.capacity()); 72 73 try { 74 char[] str = {'a', 'b', 'c', 'd'}; 75 // test if negative length 76 sb.append(str, 0, Integer.MIN_VALUE + 10); 77 throw new RuntimeException("IndexOutOfBoundsException not thrown"); 78 } catch (IndexOutOfBoundsException ex) { 79 } 80 } 81} 82