[Java] Printing Array List To Text File

Suppose you have a unidimensional list of Strings. And you want to write that list placing one item of the list in one line of a file.

First you have the list

        List sample = new ArrayList<>();
        sample.add("foo");
        sample.add("bar");
        sample.add("bizz");
        sample.add("bazz");

Then we define a BufferWriter with a FileWriter pointing to where the file will be

 BufferedWriter writer = new BufferedWriter(new FileWriter("out.txt"));

Then we do some streams and forEach to write the file.

       sample.stream().forEach(s -> {
            System.out.println(s);
            try {
                writer.write(s + '\n');
            } catch (IOException e) {
                e.printStackTrace();
            }
        });

And finally we close the buffer as good citizens.

  writer.close();

All together now:

package com.sourcecodecenter;

import java.util.*;
import java.io.*;

public class ListToFile {
    public static void main(String []args) throws Exception {
        List sample = new ArrayList<>();
        sample.add("foo");
        sample.add("bar");
        sample.add("bizz");
        sample.add("bazz");

        BufferedWriter writer = new BufferedWriter(new FileWriter("out.txt"));
        sample.stream().forEach(s -> {
            System.out.println(s);
            try {
                writer.write(s + '\n');
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
        writer.close();
    }
}