Component.java 文件源码

/**
 * Gets the foreground color of this component.
 * @return this component's foreground color; if this component does
 * not have a foreground color, the foreground color of its parent
 * is returned
 * @see #setForeground
 * @since 1.0
 */
@Transient
public Color getForeground() {
    Color foreground = this.foreground;
    if (foreground != null) {
        return foreground;
    }
    Container parent = this.parent;
    return (parent != null) ? parent.getForeground() : null;
}