Convert String[] to comma separated string in java

Question

i have one String[]

String[] name = {\"amit\", \"rahul\", \"surya\"};

i want to send name as parameter in sql query inside IN

Answer 1

As tempting and "cool" as the code may appear, do not use fold or reduce on large collections of strings, as these will suffer from the string concatenation problem

String[] strings = { "foo", "bar", "baz" };
Optional result = Arrays.stream(strings)
        .reduce((a, b) -> String.format("%s,%s", a, b));
System.out.println(result.get());

Instead, as per other answers, use String.join() if you already have a collection, or a StringBuilder if not.