why is this file empty? this code should populate it with stuff

Question

package stuff;

import java.io.IOException;

public class DataWriter {
    public static void main(String[] args) throws  IOException {
        java.io.File file = new j         


        

Answer 1

your not closing the output variable

java.io.File file = new java.io.File("mydata.txt");
        if(file.exists()) {
            System.out.println("file already exists");
            System.exit(1);

        }
         java.io.PrintWriter output = new java.io.PrintWriter(file);
        output.println("data1");
        output.println("data2");
        output.println("data3");
        output.println("data4");
        output.println("data5");
        output.println("data6");
        output.println(" data7");
        output.close();          //close<--------------------------------
        System.out.println("data8");

Answer 2

You need to close the file with:

output.close();