返回给定的类（val）作为其自身；如果它等于默认的Class，则返回null。

/**

 * Copyright (C) 2011 Tom Spencer <thegaffer@tpspencer.com>

 *

 * This file is part of TAL.

 *

 * TAL is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * TAL is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with TAL. If not, see <http://www.gnu.org/licenses/>.

 *

 * Note on dates: Year above is the year this code was built. This

 * project first created in 2008. Code was created between these two

 * years inclusive.

 */

//package com.nowjava;


public class Main {
/**
 * nowjava - 时代Java 提 供 
**/

    public static void main(String[] argv) throws Exception {

        Class val = String.class;

        Class defaultClass = String.class;

        System.out.println(getAnnotationClass(val, defaultClass));

    }


    /**

     * Returns the given class (val) as itself or nulls if it

     * it is equal to the defaultClass. This is because you

     * cannot have null as default, so this method helps deal

     * with that.

     * 

     * @param val The class

     * @param defaultClass The class that if above is equal to should null the result

     * @return The val, or null if it is equal to default

     */

    public static Class<?>