A quick and easy way to join array elements with a separator (the opposite of split) in Java [duplicate]

Answer 1

Even easier you can just use Arrays, so you will get a String with the values of the array separated by a ","

String concat = Arrays.toString(myArray);

so you will end up with this: concat = "[a,b,c]"

Update

You can then get rid of the brackets using a sub-string as suggested by Jeff

concat = concat.substring(1, concat.length() -1);

so you end up with concat = "a,b,c"

if you want to use Kotlin:

 val concat = myArray.joinToString(separator = ",") //"a,b,c"