java join and split

I did implement it in my many projects. Because of my common library is not a part of the java standard, I have to write it each time. I think many people must have almost the same experience.

public static String join( String token, String[] strings )
    {
        StringBuffer sb = new StringBuffer();
        
        for( int x = 0; x < ( strings.length - 1 ); x++ )
        {
            sb.append( strings[x] );
            sb.append( token );
        }
        sb.append( strings[ strings.length - 1 ] );
        
        return( sb.toString() );
    }

for guys who have an old JDK, the split function doesn't exist prior to jdk1.3. The alternative is the following, using the StringTokenizer class

instead of

String line_fields[]=line_data.split("\\t");

use

StringTokenizer line_fields =  new StringTokenizer(line_data,"\t");

reference:
the enhancement require to sun
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5015163