JsonNull.java

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
    }

    /**
     * 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;
    }
}