Java example source code file (MethodReference60.java)

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Java - Java tags/keywords

arrayfactory, badarrayfactory1, badarrayfactory2, badarrayfactory3, methodreference60

The MethodReference60.java Java example source code

/*
 * Copyright (c) 2012, 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 8004102
 * @summary Add support for array constructor references
 * @compile/fail/ref=MethodReference60.out -XDrawDiagnostics MethodReference60.java
 */
public class MethodReference60 {

    interface ArrayFactory<X> {
        X make(int size);
    }

    interface BadArrayFactory1<X> {
        X make();
    }

    interface BadArrayFactory2<X> {
        X make(int i1, int i2);
    }

    interface BadArrayFactory3<X> {
        X make(String s);
    }

    public static void main(String[] args) {
        BadArrayFactory1<int[]> factory1 = int[]::new; //param mismatch
        BadArrayFactory2<int[]> factory2 = int[]::new; //param mismatch
        BadArrayFactory3<int[]> factory3 = int[]::new; //param mismatch
        ArrayFactory<Integer> factory4 = int[]::new; //return type mismatch
        ArrayFactory<Integer[]> factory5 = int[]::new; //return type mismatch
    }
}