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/*
* Copyright (c) 2012, 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 lambda expressions
* @compile LambdaTest1.java
* @run main LambdaTest1
*/
import java.util.Collections;
import java.util.List;
import java.util.ArrayList;
public class LambdaTest1 {
public static void main(String[] args) {
LambdaTest1 test = new LambdaTest1();
test.method2((int n) -> { });
test.method2((int n) -> { });
test.method2((int n) -> { return; }); // ";" is mandatory here
test.method2((int n) -> { System.out.println(n); }); // ";" is optional here
test.method2(n -> { System.out.println(n); }); //warning, explict type required for n?
test.method3(()-> { System.out.println("implementing VoidVoid.vvMethod()"); });
test.method3(() -> {});
test.method4(()-> 42);
test.method4(()-> { return 42; });//";" is mandatory here
test.method5((int n)-> n+1);
test.method5((int n) -> 42);
test.method5((int n) -> { return 42; });
test.method5(
(int n) -> { //"{" optional here
if(n > 0)
return n++;
else
return n--;
}
);
Runnable r = ()-> { System.out.println("Runnable.run() method implemented"); };
r.run();
((Runnable)()-> { System.out.println("Runnable.run() method implemented"); }).run();
}
void method2(VoidInt a) {
System.out.println("method2()");
final int N = 1;
int n = 2; //effectively final variable
System.out.println("method2() \"this\":" + this);
((Runnable)
()->{
System.out.println("inside lambda \"this\":" + this);
System.out.println("inside lambda accessing final variable N:" + N);
System.out.println("inside lambda accessing effectively final variable n:" + n);
}
).run();
//n++; //compile error if n is modified
a.viMethod(2);
}
void method3(VoidVoid a) {
System.out.println("method3()");
a.vvMethod();
}
void method4(IntVoid a) {
System.out.println("method4()");
System.out.println(a.ivMethod());
}
void method5(IntInt a) {
System.out.println("method5()");
System.out.println(a.iiMethod(5));
}
//SAM type interfaces
interface VoidInt {
void viMethod(int n);
}
interface VoidVoid {
void vvMethod();
}
interface IntVoid {
int ivMethod();
}
interface IntInt {
int iiMethod(int n);
}
}
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