Convert map to String

import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class Main {
  public static final String mapToString( Map map )
  {
      if ( ( map == null ) || ( map.size() == 0 ) )
      {
          return "";
      }

      StringBuffer sb = new StringBuffer();
      boolean isFirst = true;

      Iterator iter = map.keySet().iterator();

      while ( iter.hasNext() )
      {
          if ( isFirst )
          {
              isFirst = false;
          }
          else
          {
              sb.append( ", " );
          }

          Object key = iter.next();
          sb.append( key );
          sb.append( " = '" ).append( map.get( key ) ).append( "'" );
      }

      return sb.toString();
  }

}