Java Void类

package java.lang;
/**
 * The {@code Void} class is an uninstantiable placeholder class to hold a
 * reference to the {@code Class} object representing the Java keyword
 * void.
 *
 * @author  unascribed
 * @since   JDK1.1
 */
public final
class Void {
    /**
     * The {@code Class} object representing the pseudo-type corresponding to
     * the keyword {@code void}.
     */
    @SuppressWarnings("unchecked")
    public static final Class<Void> TYPE = (Class<Void>) Class.getPrimitiveClass("void");
    /*
     * The Void class cannot be instantiated.
     */
    private Void() {}
}

    /*
     * Return the Virtual Machine's Class object for the named
     * primitive type.
     */
    static native Class<?> getPrimitiveClass(String name);