Component.java里的一段代码，不知道第二个方法上的注释是什么意思，求助
/** * Determines whether this component is enabled. An enabled component * can respond to user input and generate events. Components are * enabled initially by default. A component may be enabled or disabled by * calling its <code>setEnabled</code> method. * @return <code>true</code> if the component is enabled, * <code>false</code> otherwise * @see #setEnabled * @since JDK1.0 */ public boolean isEnabled() { return isEnabledImpl(); } /* * This is called by the native code, so client code can't * be called on the toolkit thread. */ final boolean isEnabledImpl() { return enabled; }