public static String arrayToString(String[] strs){
  if (strs.length == 0) {
    return "";
  }
  StringBuilder sbuf=new StringBuilder();
  sbuf.append(strs[0]);
  for (int idx=1; idx < strs.length; idx++) {
    sbuf.append(",");
    sbuf.append(strs[idx]);
  }
  return sbuf.toString();
}

public static String arrayToString ( String [ ] strs ) { if ( strs . length == 0 ) { return "" ; } StringBuilder sbuf = new StringBuilder ( ) ; sbuf . append ( strs [ 0 ] ) ; for ( int idx = 1 ; idx < strs . length ; idx ++ ) { sbuf . append ( "," ) ; sbuf . append ( strs [ idx ] ) ; } return sbuf . toString ( ) ; }
given an array of strings , return a comma - separated list of its elements .
