Java example source code file (JsonNull.java)

This example Java source code file (JsonNull.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

deprecated, instance, jsonelement, jsonnull, override

The JsonNull.java Java example source code

/*
 * Copyright (C) 2008 Google Inc.
 *
 * 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.
 */

package com.google.gson;

/**
 * A class representing a Json {@code null} value.
 *
 * @author Inderjeet Singh
 * @author Joel Leitch
 * @since 1.2
 */
public final class JsonNull extends JsonElement {
  /**
   * singleton for JsonNull
   *
   * @since 1.8
   */
  public static final JsonNull INSTANCE = new JsonNull();

  /**
   * Creates a new JsonNull object.
   * Deprecated since Gson version 1.8. Use {@link #INSTANCE} instead
   */
  @Deprecated
  public JsonNull() {
    // Do nothing
  }

  @Override
  JsonNull deepCopy() {
    return INSTANCE;
  }

  /**
   * All instances of JsonNull have the same hash code since they are indistinguishable
   */
  @Override
  public int hashCode() {
    return JsonNull.class.hashCode();
  }

  /**
   * All instances of JsonNull are the same
   */
  @Override
  public boolean equals(Object other) {
    return this == other || other instanceof JsonNull;
  }
}