/**
 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http: //www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

interface J{
    toString(): String {
        return "";
    }
    $_hashCode():int{
        return 4;
    }
}

class JImpl implements J{
}

function main(): void {
    let o: JImpl = new JImpl()
    assert o.$_hashCode() == 4
}

/* @@? 17:13 Error TypeError: Cannot override non-private method of the class Object from an interface.  */
/* @@? 17:13 Error TypeError: Method toString(): String in J not overriding any method  */
/* @@? 20:15 Error TypeError: Cannot override non-private method of the class Object from an interface.  */
/* @@? 20:15 Error TypeError: Method $_hashCode(): int in J not overriding any method  */