80 lines
2.4 KiB
Java
80 lines
2.4 KiB
Java
/*
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* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8003280
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* @summary Add lambda tests
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* Test constructor reference
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* @compile MethodRef4.java
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* @run main MethodRef4
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*/
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public class MethodRef4 {
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static interface A {Fee<String> m();}
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static interface B {Fee<String> m(String s);}
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static interface C {Object m();}
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static class Fee<T> {
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private T t;
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public Fee() {
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System.out.println("Fee<T> instantiated");
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}
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public Fee(T t) {
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this.t = t;
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System.out.println("Fee<T> instantiated: " + t);
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}
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public void make() {
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System.out.println(this + ": make()");
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}
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}
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private static void assertTrue(boolean cond) {
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if (!cond)
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throw new AssertionError();
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}
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public static void main(String[] args) {
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A a = Fee<String>::new; //constructor reference to Fee<T>()
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a.m().make();
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B b = Fee<String>::new; //constructor reference to Fee<T>(String)
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b.m("hi").make();
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C c = MethodRef4::new; //constructor reference to MethodRef4()
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assertTrue( c.m() instanceof MethodRef4 );
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c = MethodRef4::new; //constructor reference to MethodRef4()
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assertTrue( c.m() instanceof MethodRef4 );
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c = Fee<String>::new; //constructor reference to Fee<T>()
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assertTrue( c.m() instanceof Fee );
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}
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}
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