[JAVA] Remove leading or trailing spaces in a String using regular expressions

import java.util.regex.*;

public class BlankRemover
{

   /* remove leading whitespace */
   public static String ltrim(String source) {
       return source.replaceAll("^\\s+&qu  ot;, "");

   }

   /* remove trailing whitespace */
   public static String rtrim(String source) {
       return source.replaceAll("\\s+$&qu  ot;, "");
   }

   /* replace multiple whitespaces between words with single blank */

   public static String itrim(String source) {
       return source.replaceAll("\\b\\s{2  ,}\\b", " ");
   }

   /* remove all superfluous whitespaces in source string */
   public static String trim(String source) {

       return itrim(ltrim(rtrim(source)  ));
   }

   public static String lrtrim(String source){
       return ltrim(rtrim(source));
   }

   public static void main(String[] args){
       String oldStr =

        ">     <1-2-1-2-1-2-1-2-1-2-1>   <";
       String newStr = oldStr.replaceAll("-",   " ");
       System.out.println(newStr);

       System.out.println(ltrim(newStr));
       System.out.println(rtrim(newStr));
       System.out.println(itrim(newStr));
       System.out.println(lrtrim(newStr));
   }
}