Question

import java.io\.\*; import java.nio.file\.\*; public class TestFileReader { public static void main(String[] args) { Path p = Paths.get("a.txt"); try (BufferedReader in = new BufferedReader( new FileReader(p.toFile()))) { String line = in.readLine(); while (line != null) { String[] v = line.split("::"); String lname = v[0]; String fname = v[1]; String dept = v[2]; System.out.println(fname + " " + lname + ", dept " + dept); line = in.readLine(); } } catch (FileNotFoundException e) { System.out.println("File not found."); } catch (IOException e) { System.out.println("I/O error."); } } } (Refer to code example 15-1.) What delimiter is used to separate fields in the a.txt file?

Answer 1

The delimiter use is "::".

Step-by-step explanation:

The Java inbuilt String.split( ) function is use to split a String into an array of String.

The split( ) takes delimiter as arguments/parameter which determines at which point the string is to be broken down into different part/token.

From the above code snippet;

Each line in the file a.txt that is not null is splitted using the statement below:

String[ ] v = line.split("::");

The line is splitted using "::" as delimiter and the resulting array is then assigned to the variable 'v'.

For instance, a line in the file could take the form:

John::Smith::Music

When it is splitted,

String lname = John;

because lname make reference to index 0 of the array.

String fname = Smith;

because fname make reference to index 1 of the array.

String dept = Music;

and dept make reference to index 2 of the array.