Java outputting to text file?

Question

So I am having troubles printing to output. I understand the concept, but when it comes to this problem its kinda weird. I\'ve tried different print lines and all of them give m

Answer 1

Cause of problem: In your code, everytime you call text(), you are replacing existing file, without updating or appending new data to it.

Refer this SO question. You can write printWriter as

PrintWriter output = new PrintWriter(new BufferedWriter(new FileWriter("test.txt", true)));

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I have tested on local, Try this code.

public void text() {
    try {
        // Adding data to existing file without replacing it.
        PrintWriter output = new PrintWriter(new BufferedWriter(new FileWriter("test.txt", true)));
        output.print(data[0]);
        for (int i = 1; i < data.length; i++) {
            output.printf(", %d", data[i]);
        }
        output.print("\n"); // Added next line in the file
        output.flush();
        output.close(); // closing PrintWriter.
    } catch (Exception ex) {
        // log your exception.
    }
}