Value:

 /**
     * The value of the Boolean.
     *
     * @serial
     */
    private final boolean value;

实例：

    /**
     * The {@code Boolean} object corresponding to the primitive
     * value {@code true}.
     */
    public static final Boolean TRUE = new Boolean(true);

    /**
     * The {@code Boolean} object corresponding to the primitive
     * value {@code false}.
     */
    public static final Boolean FALSE = new Boolean(false);