Hyphen separated string from hashmap keyset

Asked May 20 '21 at 13:31

Active May 20 '21 at 13:35

Viewed 155 times

I have keyset in which keys are product name, I want to accumulate all the product name in single String variable in below format:

Prod1-Prod2-Prod3

I have tried

for(String prod: map.keySet()){
String prodName+=prod+"-";
}

but it displays

nullProd1-Prod2-

How do I get rid of null and the last extra hyphen

asked May 20 '21 at 13:31

user9634982

1

Easiest is to use `String.join("-", map.keySet())`. – ernest_k May 20 '21 at 13:36
Wow.......it works like a charm, thanks so much – user9634982 May 20 '21 at 13:47

0 Answers0