UnsoundInference.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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 5020448
 * @summary Generic method allowing passing of types that don't match collection types
 * @author gafter
 *
 * @compile/fail  UnsoundInference.java
 */

import java.util.ArrayList;
import java.util.Collection;

public class UnsoundInference {

    public static void main(String[] args) {
        Object[] objArray = {new Object()};
        ArrayList<String> strList = new ArrayList<String>();
        transferBug(objArray, strList);
        String str = strList.get(0);
    }

    public static <Var> void transferBug(Var[] from, Collection<Var> to) {
        to.add(from[0]);
    }
}