Java example source code file (DiffResultAfterSameOperationInnerClasses.java)

This example Java source code file (DiffResultAfterSameOperationInnerClasses.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

assertionerror, different, diffresultaftersameoperationinnerclasses, innerclass, string

The DiffResultAfterSameOperationInnerClasses.java Java example source code

/*
 * Copyright (c) 2002, 2013, 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 7167125
 * @summary Two variables after the same operation in a inner class return
 * different results
 * @run main DiffResultAfterSameOperationInnerClasses
 */

public class DiffResultAfterSameOperationInnerClasses {
    public int i = 1;
    private int j = 1;
    public String s1 = "Hi, ";
    private String s2 = "Hi, ";
    public int arr1[] = new int[]{1};
    public int arr2[] = new int[]{1};

    public static void main(String[] args) {
        DiffResultAfterSameOperationInnerClasses theTest =
                new DiffResultAfterSameOperationInnerClasses();
        InnerClass inner = theTest.new InnerClass();
        if (!inner.test1()) {
            throw new AssertionError("Different results after same calculation");
        }

        theTest.resetVars();
        if (!inner.test2()) {
            throw new AssertionError("Different results after same calculation");
        }
    }

    void resetVars() {
        i = 1;
        j = 1;
        s1 = "Hi, ";
        s2 = "Hi, ";
        arr1[0] = 1;
        arr2[0] = 1;
    }

    class InnerClass {
        public boolean test1() {
            i += i += 1;
            j += j += 1;

            arr1[0] += arr1[0] += 1;
            arr2[0] += arr2[0] += 1;

            s1 += s1 += "dude";
            s2 += s2 += "dude";

            return (i == j && i == 3 &&
                    arr1[0] == arr2[0] && arr2[0] == 3 &&
                    s1.equals(s2) && s1.endsWith("Hi, Hi, dude"));
        }

        public boolean test2() {
            (i) += (i) += 1;
            (j) += (j) += 1;

            (arr1[0])+= (arr1[0]) += 1;
            (arr2[0])+= (arr2[0]) += 1;

            (s1) += (s1) += "dude";
            (s2) += (s2) += "dude";

            return (i == j && i == 3 &&
                    arr1[0] == arr2[0] && arr2[0] == 3 &&
                    s1.equals(s2) && s1.endsWith("Hi, Hi, dude"));
        }
    }
}