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

    public void Sort(int[] sort) {
     int i = 1;
     String str = Arrays.toString(sort);

     str = str.substring(i,str.length()-1);
     System.out.println(str);
}

Answer 2

Easily can do like below:

    for (int i = 0; i < sort.length; i++) {
       System.out.print(i < sort.length-1 ?sort[i]+", " : sort[i]+"");
    }

Answer 3

You may use a StringBuilder as follows:

    StringBuilder sb =new StringBuilder();
    int[] sort = {1,2,3,4,5,7,89,4,9,6,11,23,178,29};
    for(int i : sort) sb.append(i+", ");
    if(sb.length()>2)       sb.delete(sb.length()-2, sb.length());
    System.out.println(sb.toString());

EDIT: This is not the sorting algorythm. This is just an example of how you can present it without the last comma.

Answer 4

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(","));

Answer 5

Couple of options:

public void Sort(int[] sort) {
  for (int i = 0; i < sort.length; i++) {
     System.out.print(sort[i]);
     if (i < sort.length - 1) {
       // not the last element. Add separator
       System.out.print(" ,");  
     }
  }
}

Another way:

public void Sort(int[] sort) {
  String output = Arrays.toString(sort);
  System.out.println(Arrays.toString(output).substring(1, output.length-1));
}

Answer 6

I think this can fix the problem just try it.

public static void sort(int[] sort) {
    for (int a:sort) {
        if(a==sort[sort.length-1])
            System.out.println(a);
        else
            System.out.print(a+ ", ");
    }