Remove/collapse multiple spaces. : String Replace « Data Type « Java Tutorial

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 *  @author <a href="">Jason van Zyl</a>
 *  @author <a href="">Daniel Rall</a>
 *  @version $Id: 685685 2008-08-13 21:43:27Z nbubna $
public class Main {
   * Remove/collapse multiple spaces.
   * @param argStr string to remove multiple spaces from.
   * @return String
  public static String collapseSpaces(String argStr)
      char last = argStr.charAt(0);
      StringBuffer argBuf = new StringBuffer();

      for (int cIdx = 0 ; cIdx < argStr.length(); cIdx++)
          char ch = argStr.charAt(cIdx);
          if (ch != ' ' || last != ' ')
              last = ch;

      return argBuf.toString();

2.21.String Replace
2.21.1.To replace one specific character with another throughout a string
2.21.2.To remove whitespace from the beginning and end of a string (but not the interior)
2.21.3.Replacing Characters in a String: replace() method creates a new string with the replaced characters.
2.21.4.Replacing Substrings in a String
2.21.6.Replaces all occourances of given character with new one and returns new String object.
2.21.7.Replaces only first occourances of given String with new one and returns new String object.
2.21.8.Replaces all occourances of given String with new one and returns new String object.
2.21.9.Replace/remove character in a String: replace all occurences of a given character
2.21.10.To replace a character at a specified position
2.21.11.Replace \r\n with the
2.21.12.Replace multiple whitespaces between words with single blank
2.21.13.Unaccent letters
2.21.14.Only replace first occurence
2.21.15.Get all digits from a string
2.21.16.Returns a new string with all the whitespace removed
2.21.17.Removes specified chars from a string
2.21.18.Remove/collapse multiple spaces.