Java Print array on the same line with separator

Question

I have a class that is reading a specific column from a file and inserting it in a an array. I would like to have that array printed on the same line with a comma separator.

Below is my code:

public static void getArray(int Column, File path, String Splitter) throws IOException
{
    List<String> lines = Files.readAllLines(path.toPath(), StandardCharsets.US_ASCII); 

    for (String line : lines) 
    { 
        String[] array = line.split(Splitter); 

         //Will return all elemetns on the same line but without any separation, i need some kind of separation 
         // if i use System.out.print(array[Column]+" ,");
         // i will always get a , at the end of the line
        System.out.print(array[Column]);

    }
}


getArray(3, file, "|");

Current output is:

abcdefg

Desired output is:

a,b,c,d,e,g

Answer 1

You can use a joining collector.

to join the elements of the array with the delimiter ,.

String result = Arrays.stream(array)
                      .collect(Collectors.joining(","));

to join the characters of a given element within the array with the delimiter ,.

String result = Arrays.stream(array[Column].split(""))
                      .collect(Collectors.joining(","));

another variant of joining the characters of a given element within the array with the delimiter ,:

String result = array[Column].chars()
                             .mapToObj( i -> String.valueOf((char)i))
                             .collect(Collectors.joining(","));