Java Assert Null assertNull(final Object value, final String name)

Description

Asserts that the parameter's value is null.

License

Apache License

Parameter

Parameter	Description
value	parameter to check
name	name of parameter, which appears in error message

Exception

Parameter	Description
IllegalArgumentException	Is thrown if the value is not null.

Declaration

public static void assertNull(final Object value, final String name) throws IllegalArgumentException 

Method Source Code

//package com.java2s;
/*/*from  w  w  w. j av a  2s  .c  om*/
 * Copyright 2016 PantherCode
 *
 * 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.
 */

public class Main {
    /**
     * Beginning of each error message
     */
    private static String PREFIX = "The value of ";

    /**
     * Asserts that the parameter's value is null.
     *
     * @param value parameter to check
     * @param name  name of parameter, which appears in error message
     * @throws IllegalArgumentException Is thrown if the value is not null.
     */
    public static void assertNull(final Object value, final String name) throws IllegalArgumentException {
        if (value != null) {
            throw new IllegalArgumentException(PREFIX + name + " is not null.");
        }
    }
}

Related

1. assertIsNull(Object obj)
2. assertNonNull(final T object, final String paramName)
3. assertNonNull(String argumentName, Object argument)
4. assertNoNull(Object object, String paramName)
5. assertNull(final Object obj, final String msg)
6. assertNull(Object o)
7. assertNull(Object obj)
8. assertNull(Object obj)
9. assertNull(Object object)