Tests if an integer is power of two

  
/**
  Copyright (C) 2009,2010  Tobias Domhan

    This file is part of AndOpenGLCam.

    AndObjViewer 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.

    AndObjViewer 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 AndObjViewer.  If not, see <http://www.gnu.org/licenses/>.
 
 */
//package edu.dhbw.andar;

/**
 * @author Tobias Domhan
 *
 */
 class GenericFunctions {
  /**
   * tests if an integer is power of two
   * source: http://www.devmaster.net/forums/showthread.php?t=1728
   * @param value
   * @return
   */
  static final boolean isPowerOfTwo (int value)  {
    if(value != 0) {
      return (value & -value) == value;
    } else {
      return false;
    }
  }

}

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Tests if an integer is power of two : Integer « Date Type « Android

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