ToLowerCase

import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.File;
import java.util.Scanner;

public class ToLowercase {

    public static void main(String[] args) throws FileNotFoundException {
        File inputFile = new File("inputfile.txt");
        File outputFile = new File("outputfile.txt");
        Scanner keyboard = new Scanner(System.in);
        Scanner fileScan = new Scanner(inputFile);
        PrintWriter input = new PrintWriter(inputFile);
        PrintWriter output = new PrintWriter(outputFile);

        String keyInput = "";
        String hold1 = "";
        String hold2 = "";
        String hold3 = "";

        System.out.println("Type as many words or letters as you want to sort and when you want to stop type a plus sign!");
        keyboard.useDelimiter("");
        hold1 = keyboard.next();

        while(!hold1.equals("+")){
            keyInput += hold1;
            hold1 = keyboard.next();
        }
        keyboard.close();

        input.write(keyInput);
        input.close();

        fileScan.useDelimiter("");

        while(fileScan.hasNext()){
            hold2 = fileScan.next();

            if(hold2.equals("1") || hold2.equals("2") || hold2.equals("3") || hold2.equals("4") || hold2.equals("5") || hold2.equals("6") || hold2.equals("7") || hold2.equals("8") || hold2.equals("9") || hold2.equals("0")){
                hold3 = hold2;
            } else{
                hold3 = hold2.toLowerCase();
            }

            output.write(hold3);
        }
        output.close();

    }


}