test/langtools/tools/javac/generics/ParenVerify.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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).
 *
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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 4881397
 * @summary generics: verify error when redundant parens used!
 * @author gafter
 *
 * @compile  ParenVerify.java
 * @run main ParenVerify
 */

import java.util.*;

public class ParenVerify {

    public static void main(String argss[]) {
        for(Iterator<Integer> i  = test("Foo"); i.hasNext(); )
            System.out.println(i.next());
    }
    static HashMap<String, LinkedList<Integer>> m
        = new HashMap<String, LinkedList<Integer>>();

    public static Iterator<Integer> test(String s) {
        LinkedList<Integer> lst = new LinkedList<Integer>();
        lst.add(new Integer(12));
        m.put("Hello", lst);

        // jsr14-1.3ea generates code that won't verify.
        // Removing the extra set of parenthesis in the
        // statement below fixes the problem
        lst = (m.get("Hello"));
        return lst.iterator();
    }
}