How to write an ArrayList of Strings into a text file?

Question

I want to write an ArrayList into a text file.

The ArrayList is created with the code:

ArrayList arr = new A         


        

Answer 1

import java.io.FileWriter;
...
FileWriter writer = new FileWriter("output.txt"); 
for(String str: arr) {
  writer.write(str + System.lineSeparator());
}
writer.close();