1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/funcInterfaces/LambdaTest1.java Wed Apr 27 01:34:52 2016 +0800
1.3 @@ -0,0 +1,119 @@
1.4 +/*
1.5 + * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/**
1.28 + * @test
1.29 + * @bug 8003280
1.30 + * @summary Add lambda tests
1.31 + * This test is for lambda expressions
1.32 + * @compile LambdaTest1.java
1.33 + * @run main LambdaTest1
1.34 + */
1.35 +
1.36 +import java.util.Collections;
1.37 +import java.util.List;
1.38 +import java.util.ArrayList;
1.39 +
1.40 +public class LambdaTest1 {
1.41 + public static void main(String[] args) {
1.42 +
1.43 + LambdaTest1 test = new LambdaTest1();
1.44 +
1.45 + test.method2((int n) -> { });
1.46 + test.method2((int n) -> { });
1.47 + test.method2((int n) -> { return; }); // ";" is mandatory here
1.48 + test.method2((int n) -> { System.out.println(n); }); // ";" is optional here
1.49 + test.method2(n -> { System.out.println(n); }); //warning, explict type required for n?
1.50 +
1.51 + test.method3(()-> { System.out.println("implementing VoidVoid.vvMethod()"); });
1.52 + test.method3(() -> {});
1.53 +
1.54 + test.method4(()-> 42);
1.55 + test.method4(()-> { return 42; });//";" is mandatory here
1.56 +
1.57 + test.method5((int n)-> n+1);
1.58 + test.method5((int n) -> 42);
1.59 + test.method5((int n) -> { return 42; });
1.60 + test.method5(
1.61 + (int n) -> { //"{" optional here
1.62 + if(n > 0)
1.63 + return n++;
1.64 + else
1.65 + return n--;
1.66 + }
1.67 + );
1.68 +
1.69 + Runnable r = ()-> { System.out.println("Runnable.run() method implemented"); };
1.70 + r.run();
1.71 + ((Runnable)()-> { System.out.println("Runnable.run() method implemented"); }).run();
1.72 + }
1.73 +
1.74 + void method2(VoidInt a) {
1.75 + System.out.println("method2()");
1.76 + final int N = 1;
1.77 + int n = 2; //effectively final variable
1.78 + System.out.println("method2() \"this\":" + this);
1.79 + ((Runnable)
1.80 + ()->{
1.81 + System.out.println("inside lambda \"this\":" + this);
1.82 + System.out.println("inside lambda accessing final variable N:" + N);
1.83 + System.out.println("inside lambda accessing effectively final variable n:" + n);
1.84 + }
1.85 + ).run();
1.86 + //n++; //compile error if n is modified
1.87 + a.viMethod(2);
1.88 + }
1.89 +
1.90 + void method3(VoidVoid a) {
1.91 + System.out.println("method3()");
1.92 + a.vvMethod();
1.93 + }
1.94 +
1.95 + void method4(IntVoid a) {
1.96 + System.out.println("method4()");
1.97 + System.out.println(a.ivMethod());
1.98 + }
1.99 +
1.100 + void method5(IntInt a) {
1.101 + System.out.println("method5()");
1.102 + System.out.println(a.iiMethod(5));
1.103 + }
1.104 +
1.105 +
1.106 + //SAM type interfaces
1.107 + interface VoidInt {
1.108 + void viMethod(int n);
1.109 + }
1.110 +
1.111 + interface VoidVoid {
1.112 + void vvMethod();
1.113 + }
1.114 +
1.115 + interface IntVoid {
1.116 + int ivMethod();
1.117 + }
1.118 +
1.119 + interface IntInt {
1.120 + int iiMethod(int n);
1.121 + }
1.122 +}
