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Java example source code file (InferenceTest11.java)
The InferenceTest11.java Java example source code/* * Copyright (c) 2011, 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 8003280 * @summary Add lambda tests * This test is for self referential and recursive lambda expression that have type inference * @compile InferenceTest11.java * @run main InferenceTest11 */ public class InferenceTest11 { private static void assertTrue(boolean b) { if(!b) throw new AssertionError(); } static Func<Integer, Integer> f1; static Func<Integer, ? extends Number> f2; public static void main(String[] args) { f1 = n -> { if(n <= 0) return 0; if(n == 1) return 1; return f1.m(n-1) + f1.m(n-2); }; assertTrue(f1.m(-1) == 0); assertTrue(f1.m(0) == 0); assertTrue(f1.m(10) == 55); f2 = n -> { if(n <= 1) return 1.0; return 2 * (Double)f2.m(n-1) + 1; }; assertTrue(f2.m(4).doubleValue() == 15.0); } interface Func<T, V> { V m(T t); } } Other Java examples (source code examples)Here is a short list of links related to this Java InferenceTest11.java source code file: |
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