Concatenating elements in an array to a string

Question

I\'m confused a bit. I couldn\'t find the answer anywhere ;(

I\'ve got an String array:

String[] arr = [\"1\", \"2\", \"3\"];

then

Answer 1

For Spring based projects:

org.springframework.util.StringUtils.arrayToDelimitedString(Object[] arr, String delim)

For Apache Commons users, set of nice join methods:

org.apache.commons.lang.StringUtils.join(Object[] array, char separator)