Java实现给定字符串的倒序输出

public String orderDesc(String str){
       byte [] bytes = str.getBytes();
       for ( int i = 0; i < bytes.length / 2 ; i++) {
             Byte b = bytes [i] ;
             bytes [i] = bytes [bytes.length - 1 -i ] ;
             bytes [bytes.length - 1 -i ] = b ;
       }
       return new String (bytes) ;
}

public static String orderDesc(String str){
      char[] charArray = str.toCharArray(); 
      String newStr = "";
      for (int i=charArray.length-1; i>=0; i--){ 
        newStr += charArray[i]; 
      } 
      return newStr;
}