Remove last separator from print statement

Question

Here\'s a method for sorting an integer array. How can I remove the last separator form the output?

public void Sort(int[] sort) {
        for (int a:sort) {
            


        

Answer 1

If you are using Java 8, a very clean solution is using the new StringJoiner class. This class was designed to join Strings together with a custom separator, and possibly with a prefix / suffix. With this class, you don't need to worry about deleting the last separator as you do in your snippet.

public void sort(int[] sort) {
    StringJoiner sj = new StringJoiner(",");
    for (int a : sort) {
        sj.add(String.valueOf(a));
    }
    System.out.println(sj.toString());
}

You could also drop the for loop and use Streams instead:

String str = Arrays.stream(sort).mapToObj(String::valueOf).collect(joining(","));