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/*
* 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
* Test lambda expressions for different method signatures (parameter and return type)
* @compile LambdaTest2.java
* @run main LambdaTest2
*/
public class LambdaTest2 {
private static int count = 0;
private static void assertTrue(boolean b) {
if(!b)
throw new AssertionError();
}
public static void main(String[] args) {
LambdaTest2 test = new LambdaTest2();
test.method2((int n) -> { ; });
test.method2(n -> { }); // "int" is optional here
test.method2((int n) -> { }); // ";" is optional here
test.method2((int n) -> { return; }); // ";" is mandatory here
test.method2((int n) -> { count += n; });
assertTrue(count == 10);
VoidInt vi = (int i) -> {
switch (i) {
case 0:
System.out.println("normal");
break;
default:
System.out.println("invalid");
}
};
test.method3(()-> { count++; });
test.method3(() -> {});
assertTrue(count == 11);
VoidVoid vv = ()-> { while(true)
if(false)
break;
else
continue;
};
IntVoid iv1 = () -> 42;
IntVoid iv2 = () -> { return 43; };//";" is mandatory here
assertTrue(iv1.ivMethod() == 42);
assertTrue(iv2.ivMethod() == 43);
IntInt ii1 = (int n) -> n+1;
IntInt ii2 = n -> 42;
IntInt ii3 = n -> { return 43; };
IntInt ii4 =
(int n) -> {
if(n > 0)
return n+1;
else
return n-1;
};
assertTrue(ii1.iiMethod(1) == 2);
assertTrue(ii2.iiMethod(1) == 42);
assertTrue(ii3.iiMethod(1) == 43);
assertTrue(ii4.iiMethod(-1) == -2);
}
void method2(VoidInt a) {
a.viMethod(10);
}
void method3(VoidVoid a) {
a.vvMethod();
}
//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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