import java.io.*;

class TextOutput {
    public static void main(String[] args) throws IOException {
        FileWriter out = new FileWriter("output.txt");
        
        out.write("This is my text file.\n");
        for( int i=0; i<20; i++ ) {
            out.write( Integer.toString(i) );
            out.write( '\n' );
        }
        
        out.close();
    }
}