Can someone tell me why does my code not work?

[Smallfry123]

My code is supposed to take in words from the end user and store them in a file called dictionary, one word at a time. But t doesn't do so. Can someone tell me why?

import javax.swing.JOptionPane;
import java.io.*;
import java.util.*;
public class RoughWork
{
	public static void main(String[]args) throws IOException
	{
		String maxWords = "", minWords = "";
		int maxLength=0, minLength=2000;
		String input = "", aWord="";
		boolean cont,finished = false;
		FileWriter aFileWriter = new FileWriter("Dictionary.txt");
		PrintWriter out = new PrintWriter(aFileWriter);
		while(!finished)
		{
			cont = false;
			while(!cont)
			{
				input = JOptionPane.showInputDialog(null,"Please enter the word you'd like to add to the dictionary: ");
				if(input.contains(" ") || input.matches(".*\\d.*") ||input == ""){
					JOptionPane.showMessageDialog(null,"Please enter one word only!");
					cont = false;
				}
				else if( input == null){
					cont=true;
					finished= true;
				}
				else
					cont = true;
			}
		}
		out.println(input);
	}
}