Write line at the end of the text document

Question

I am trying to write line at the end of my text document but nothing is being printed at the end of the hello2.txt with this code just the hello.txt is being printed. This line last line in the text document. is not being printed at the end of the hello2.txt. How can I fix that?

I appreciate any help.

hello.txt

I am at home
how are you brother?
I am facing problem

hello2.txt Should looks like this

I am at home
how are you brother?
I am facing problem
last line in the text document.

Code:

public static void main(String[] args) {
    File file = new File("D:\\hl_sv\\hello.txt");
    try (PrintWriter writer = new PrintWriter("D:\\hl_sv\\hello2.txt");

    Scanner scanner = new Scanner(file)) {
        while (scanner.hasNextLine()) {
            String line = scanner.nextLine();

            if (line.isEmpty()) {
                System.out.println("last line in the text document");
                writer.println("last line in the text document.");
            } else {
                writer.println(line);
            }

        }

    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

I dont think you want to be using isEmpty() to check the last line. — Kevin Mee, Jun 08 '15 at 18:00
@XorProgramming - this is not the same question, and not the same problem. — MByD, Jun 08 '15 at 18:02
duplicate of this question http://stackoverflow.com/questions/30714916/check-whether-the-line-is-the-last-one-in-the-text-document/30715315#30715315 — Md. Nasir Uddin Bhuiyan, Jun 08 '15 at 18:14

arjuns · Answer 1 · 2015-06-08T18:09:12.260

2

Also, because it looks like you want to append this line to the end of the text file, use:

writer = new PrintWriter(new FileWriter(nameOfFile, true));

In fact, simply just use the writer.append(String) method in order to add the desired String at the end of the file.

edited Jun 08 '15 at 18:09

answered Jun 08 '15 at 18:02

arjuns

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1
8

MByD · Accepted Answer · 2015-06-08T18:08:01.307

2

After the last line, while (scanner.hasNextLine()) will be evaluated to false, those not entering the loop again, and not writing the last line. You need to add the line after the loop terminates.

edited Jun 08 '15 at 18:08

answered Jun 08 '15 at 18:04

MByD

129,681
25
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1

@Tom - you're right, I'm not familiar with Java7 features enough. Thanks! – MByD Jun 08 '15 at 18:07
This is the good thing about the try-with-resources Statement ... we can't forget to close the resource properly :D. – Tom Jun 08 '15 at 18:08

Write line at the end of the text document

2 Answers2