| /* |
| * Copyright (c) 2015, 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 8136500 |
| * @summary Test Long.toString method |
| */ |
| |
| public class ToString { |
| |
| public static void main(String[] args) throws Exception { |
| test("-9223372036854775808", Long.MIN_VALUE); |
| test("9223372036854775807", Long.MAX_VALUE); |
| test("0", 0); |
| |
| // Wiggle around the exponentially increasing base. |
| final int LIMIT = (1 << 15); |
| long base = 10000; |
| while (base < Long.MAX_VALUE / 10) { |
| for (int d = -LIMIT; d < LIMIT; d++) { |
| long c = base + d; |
| if (c > 0) { |
| buildAndTest(c); |
| } |
| } |
| base *= 10; |
| } |
| |
| for (int c = 1; c < LIMIT; c++) { |
| buildAndTest(Long.MAX_VALUE - LIMIT + c); |
| } |
| } |
| |
| private static void buildAndTest(long c) { |
| if (c <= 0) { |
| throw new IllegalArgumentException("Test bug: can only handle positives, " + c); |
| } |
| |
| StringBuilder sbN = new StringBuilder(); |
| StringBuilder sbP = new StringBuilder(); |
| |
| long t = c; |
| while (t > 0) { |
| char digit = (char) ('0' + (t % 10)); |
| sbN.append(digit); |
| sbP.append(digit); |
| t = t / 10; |
| } |
| |
| sbN.append("-"); |
| sbN.reverse(); |
| sbP.reverse(); |
| |
| test(sbN.toString(), -c); |
| test(sbP.toString(), c); |
| } |
| |
| private static void test(String expected, long value) { |
| String actual = Long.toString(value); |
| if (!expected.equals(actual)) { |
| throw new RuntimeException("Expected " + expected + ", but got " + actual); |
| } |
| } |
| } |