There is some extra (unneeded) text in the doc comment for setBackground
in java/awt/Component.java

    /**
     * Sets the background color of this component.
     * @param c The color to become this component's color.
     * If this parameter is null then this component will inherit
     * the background color of its parent.
     * background color.
     * @see #getBackground
     * @since JDK1.0
     */

Should be

    /**
     * Sets the background color of this component.
     * @param c The color to become this component's background color.
     * If this parameter is null then this component will inherit
     * the background color of its parent.
     * @see #getBackground
     * @since JDK1.0
     */