Removes an element from a an array yielding a new array with that data. : Array Insert Remove « Collections Data Structure « Java

1. Java
2. Collections Data Structure
3. Array Insert Remove

Removes an element from a an array yielding a new array with that data.

       
//package util;

import java.util.List;

/**
 *  Collection of helpful, static array procedures. These should be part of the JDK.  
 * 
 * @author Michael Tremel (mtremel@email.arizona.edu)
 */
public class ArrayUtil
{
  /**
   * Removes an element from a an array yielding a new array with that data.
   * 
   * @param elementData
   *            original array
   * @param index
   *            item to remove
   * @return new array sized to fit
   */
  public static String[] removeElement(String[] elementData, int index)
  {
    int size = elementData.length;
    String[] newData = new String[size - 1];

    int numMoved = size - index - 1;
    if (numMoved > 0)
      System.arraycopy(elementData, index + 1, newData, index, numMoved);

    elementData = null; // let the gc work
    return newData;
  }
  
  /**
   * Joins a List<String> with a symbol into a single String. Why isn't
   * this part of List? Blah.
   * 
   * @param arguments
   *            segments to be joined
   * @param symbol
   *            what the segments will be joined with
   * @return joined String of all the arguments
   */
  public static final String joinArguments(List<String> arguments, String symbol)
  {
    StringBuilder toReturn = new StringBuilder();

    for (String s : arguments)
      toReturn.append(s + symbol);

    return toReturn.toString();
  }
}

   
    
    
    
    
    
    
  

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