Java Assert Not Null assertNotNull(final Object value, final String name)

Description

Asserts that the parameter's value is not null.

License

Apache License

Parameter

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

Exception

Parameter	Description
NullPointerException	Is thrown if the value is null.

Declaration

public static void assertNotNull(final Object value, final String name) throws NullPointerException 

Method Source Code

//package com.java2s;
/*/*from ww w .  j av  a  2 s . c o m*/
 * 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 not null.
     *
     * @param value parameter to check
     * @param name  name of parameter, which appears in error message
     * @throws NullPointerException Is thrown if the value is null.
     */
    public static void assertNotNull(final Object value, final String name) throws NullPointerException {
        if (value == null) {
            throw new NullPointerException(PREFIX + name + " is null.");
        }
    }
}

Related

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3. assertNotNull(final Object object, final String message)
4. assertNotNull(final Object object, final String message)
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9. assertNotNull(final String name, final T object)