langtools/test/tools/javac/lambda/LambdaExpr07.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8003280
 * @summary Add lambda tests
 *  check access to effectively final local variable from doubly nested lambda
 * @run main LambdaExpr07
 */

public class LambdaExpr07 {

    interface Block<A, R> {
        R apply(A x);
    }

    static int assertionCount = 0;

    static void assertTrue(boolean cond) {
        assertionCount++;
        if (!cond)
            throw new AssertionError();
    }

    String S = "A";

    void test() {
        Block<String, Block<String, String>> o = s1 -> s2 -> S + s1 + s2;
        assertTrue(o.apply("B").apply("C").equals("ABC"));
    }

    public static void main(String[] args) {
        new LambdaExpr07().test();
        assertTrue(assertionCount == 1);
    }
}