import java.util.*;public class StringUtils extends Object{	public static String stringValueFromVector(Vector anArray,char aChar)	{		StringBuffer buff = new StringBuffer();				if(anArray != null)		{			buff.append(anArray.elementAt(0));					if(buff.length() > 0)			{				int i,max;							max = anArray.size();							for(i=1;i<max;i++)				{					if(aChar != '\0') buff.append(aChar);					buff.append(anArray.elementAt(i));				}			}		}				return buff.toString();	}		public static String join(String[] strings, String delimiter)	{		StringBuffer sb = new StringBuffer();		int stringCount=0;		int i;				if(strings != null) stringCount = strings.length;		if(delimiter == null)		{			delimiter = " ";		}		for(i=0; i < stringCount; i++)		{			sb.append(strings[i]);			if(i+1 < stringCount)			{				sb.append(delimiter);			}		}				return sb.toString();	}	/**	 * Joins an array of strings into a single string separated by a space	 *	 * @param     strings an array of strings to join	 * @return    The joined strings.	 */	public static String join(String[] strings)	{		return StringUtils.join(strings, " ");	}		public static Vector vectorFromString(String str, String delimiter)	{		Vector dynaArr = new Vector();		int curdex = 0;		int lastdex = 0;		int dellength = 0;		int strlen = 0;		if(str != null) strlen = str.length();				if(delimiter == null)		{			delimiter = " ";		}				dellength = delimiter.length();		if(strlen == 0)		{			return null;		}		try		{			while(lastdex != -1)			{				lastdex = str.indexOf(delimiter, curdex);				if(lastdex == -1)				{					dynaArr.addElement(str.substring(curdex, strlen));				}				else				{					dynaArr.addElement(str.substring(curdex, lastdex));				}				curdex = lastdex + dellength;			}		}		catch (StringIndexOutOfBoundsException ex)		{			dynaArr.addElement(str.substring(curdex, strlen));		}				return dynaArr;	}	public static String[] split(String str)	{		return StringUtils.split(str, " ");	}	public static String[] split(String str, String delimiter)	{		Vector dynaArr;		String[] strings;		int i,max = 0;				dynaArr = vectorFromString(str,delimiter);		max = dynaArr.size();				strings = new String[max];		for(i=0; i<max; i++)		{			strings[i] = (String)dynaArr.elementAt(i);		}				return strings;	}		public static Vector splitLines(String str)	{		Vector retVal = new Vector();		char c;		int i,max;		StringBuffer curLine = new StringBuffer();				if(str == null) return retVal;				max = str.length();				for(i=0;i<max;i++)		{			c = str.charAt(i);						if((c=='\n')||(c=='\r'))			{				if(curLine.length()>0)					retVal.addElement(curLine.toString());									curLine.setLength(0);			}			else			{				curLine.append(c);			}		}				if(curLine.length()>0)			retVal.addElement(curLine.toString());				return retVal;	}		private static void printElements(String[] strings)	{		for(int i = 0; i<strings.length; i++)		{			System.out.println(strings[i]);		}	}		public static String removeTags(String s)	{		StringBuffer buffer = new StringBuffer();		String retVal = s;		int i,max;		boolean inTag;		char c;				if(s == null) return s;				if(s.indexOf("<") >= 0)		{			inTag = false;						max = s.length();						for(i=0;i<max;i++)			{				c = s.charAt(i);								if(c == '<') inTag = true;				else if(c == '>') inTag = false;				else if(!inTag)				{					if(c == '\n') buffer.append(' ');					else if(c == '\t') buffer.append(' ');					else if(c != '\r') buffer.append(c);				}			}						retVal = buffer.toString();		}				return retVal;	}		final static String octalDigits = "01234567";	final static String hexDigits = "0123456789abcdefABCDEF";	final static String escChars = "\n\t\b\r\f\\\'\"";	final static String unescChars = "ntbrf\\'\"";	public static String unescape(String cstring)	{		if(cstring==null) return cstring;			    int len = cstring.length();	    StringBuffer sb = new StringBuffer(len);	    int val;	    int unesc;	    for(int i=0; i<len; i++)	    {	      char ch = cstring.charAt(i);	      if(ch=='\\')	      {	            i++;	            ch = cstring.charAt(i);	            if(ch>='0' && ch<='7')	            {	              val=0;	              	              for (int j=i; j-i<3 && octalDigits.indexOf(ch=cstring.charAt(j))!=-1; j++)	              {	                    val = val*8 + (((int)ch)-'0');	              }	              	              ch = (char)val;	              i+=3-1;	            }	            else if(ch=='u')	            {	              i++;	              val=0;	              	              for(int j=i; j-i<4; j++)	              {	                    ch=cstring.charAt(j);	                    	                    if (hexDigits.indexOf(ch)==-1)	                    {	                    	return null;	                    }	                    	                    val *= 16;	                    	                    if (Character.isDigit(ch)) val += (((int)ch)-'0');	                    else if (Character.isLowerCase(ch)) val += (((int)ch)-'a');	                    else val += (((int)ch)-'A');	              }	              	              i+=4-1;	              ch = (char)val;	            }	            else if((unesc=unescChars.indexOf(ch))!=-1)	            {	              ch = escChars.charAt(unesc);	            }	            else	            {	                //leave it	            }	      }	      sb.append(ch);        // usually have some translated character to append now	    }	    return sb.toString();	}	public static String escape(String raw)	{		if(raw==null) return raw;				int max = raw.length();	    StringBuffer sb = new StringBuffer(max*2);	    int unesc;		int len;		String hex;	    for (int i=0; i<max; i++)	    {			char ch = raw.charAt(i);			int ich = (int)ch;			if ((unesc=escChars.indexOf(ch))!=-1)			{			    sb.append('\\');			    sb.append(unescChars.charAt(unesc));			}			else if(ch<' ' || ich>=0x7f /*|| ich>0xff*/)			{     // not printable or Unicode			    sb.append("\\u");			    			    hex =  Integer.toHexString(ich);			    len = hex.length();			    			    for(int j=len;j<4;j++) sb.append('0');			    			    sb.append(hex);			}			else			{			    sb.append(ch);			}	    }       	    return sb.toString();	}		public static String htmlEncode(String val)	{		StringBuffer	buf = new StringBuffer(val.length() + 8);		char			c;		for(int i = 0; i < val.length(); i++)		{			c = val.charAt(i);						switch(c)			{				case '<':					buf.append("&lt;");					break;				case '>':					buf.append("&gt;");					break;				case '&':					buf.append("&amp;");					break;				case '\"':					buf.append("&quot;");					break;				default:					buf.append(c);					break;			}		}				return buf.toString();	}	public static void main(String[] args)	{		String[] strings;		strings = StringUtils.split("This is a test to see what is going on ");		printElements(strings);		System.out.println(StringUtils.join(strings));		strings = StringUtils.split("This is a test::This is another:: space", "::");		printElements(strings);		System.out.println(StringUtils.join(strings, "::"));				System.out.println(StringUtils.escape("\n\t\b\r\'\""));	}}