Quelle QualifiedOuterThis.java Sprache: JAVA

/*
* Copyright (c) 1997, 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 4091327 4079087
* @summary Verify resolution of qualified outer class 'this' references.
* @author William Maddox (maddox) [shamelessly cribbed from bug report]
*
* @clean QualifiedOuterThis QualifiedOuterThis$Y QualifiedOuterThis$Y$Z
* @compile QualifiedOuterThis.java
* @run main QualifiedOuterThis
*/

public class QualifiedOuterThis {
    static StringBuffer sb = new StringBuffer();
    public String toString() { sb.append('X'); return "X"; }
    void test() {
        class Y {
            public String toString() { sb.append('Y'); return "Y"; }
            class Z {
                public String toString() { sb.append('Z'); return "Z"; }
                void test() {
                    System.out.println(this.toString());
                    System.out.println(Y.this.toString());
                    System.out.println(QualifiedOuterThis.this.toString());
                }
            }
            void test() {
                new Z().test();
            }
        }
        new Y().test();
    }
    public static void main(String[] s) throws Exception {
        QualifiedOuterThis x = new QualifiedOuterThis();
        x.test();  // Print Z Y X
        System.out.println(sb.toString());
        if (!sb.toString().equals("ZYX")) {
            throw new Exception("incorrect outer instance method called!");
        }
    }
}

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