Get the index of an array element : Array Sort Search « Collections Data Structure « Java






  1. Java
  2. Collections Data Structure
  3. Array Sort Search

Get the index of an array element

      

/* Copyright (C) 2003 Univ. of Massachusetts Amherst, Computer Science Dept.
   This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
   http://www.cs.umass.edu/~mccallum/mallet
   This software is provided under the terms of the Common Public License,
   version 1.0, as published by http://www.opensource.org.  For further
   information, see the file `LICENSE' included with this distribution. */

//package cc.mallet.util;

import java.lang.reflect.Array;

/**
 *  Static utility methods for arrays 
 *   (like java.util.Arrays, but more useful).
 *
 * @author <a href="mailto:casutton@cs.umass.edu">Charles Sutton</a>
 * @version $Id: ArrayUtils.java,v 1.1 2007/10/22 21:37:40 mccallum Exp $
 */
public class Util{
    public static int indexOf (Object[] array, Object obj)
    {
      for (int i = 0; i < array.length; i++) {
        if ((array[i] != null) && array[i].equals (obj)) {
          return i;
        }
      }
      return -1;
    }

    public static int indexOf (int[] array, int obj)
    {
      for (int i = 0; i < array.length; i++) {
        if (array[i] == obj) {
          return i;
        }
      }
      return -1;
    }
  
}








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