算法-倒置字符串

/**

 *

 * @description

 *    <p>String utils</p>

 * @author Czp

 * @version 1.0(2014-5-9)

 *

 */

public class StringUtil {

/**

     * @description:

     *     <p>反转字符串,如果参数为null或为空窜将返回原对象</p>

     * @param str

     * @return

     */

    public static String reverseString(String str) {

        if (str == null || str.isEmpty())

            return str;

        char[] arr = str.toCharArray();

        int len = arr.length - 1;

        for (int i = 0; i < len; i++, len--) {

            char tmp = arr[i];

            arr[i] = arr[len];

            arr[len] = tmp;

        }

        return new String(arr);

    }

}

算法-倒置字符串