W3Schools Tryit Editor

import java.io.FileWriter;
import java.io.IOException;
public class WriteToFile { 
 public static void main(String[] args) { 
 try { 
 FileWriter myWriter = new FileWriter("filename.txt");
 myWriter.write("Files in Java might be tricky, but it is fun enough!");
 myWriter.close();
 System.out.println("Successfully wrote to the file.");
 } catch (IOException e) {
 System.out.println("An error occurred.");
 e.printStackTrace();
 } 
 } 
}