Pastable version of number guessing game 1000 to 9999

<pre class='prettyprint' language='actionscript'>import java.util.ArrayList;
import java.util.Random;

import javax.swing.JOptionPane;

public class Assignment2 {
	ArrayList&lt;Integer&gt; num;
	
	
	public Assignment2 ( ){
		// fill in code here
		// initialization
		num= new ArrayList&lt;Integer&gt;();
	}

public int myGuessIs() {
		// fill in code here

}
	
	public int totalNumGuesses() {
		// fill in code here
		// this should return the total number of guesses taken

}
 
	public void updateMyGuess(int nmatches) {
		// fill in code here
		// update the guess based on the number of matches claimed by the user

}
	
	// fill in code here (optional)
	// feel free to add more methods as needed
	
	
	
	// you shouldn't need to change the main function
	public static void main(String[] args) {

Assignment2 gamer = new Assignment2( );
  
		JOptionPane.showMessageDialog(null, &quot;Think of a number between 1000 and 9999.\n Click OK when you are ready...&quot;, &quot;Let's play a game&quot;, JOptionPane.INFORMATION_MESSAGE);
		int numMatches = 0;
		int myguess = 0;
		
		do {
			myguess = gamer.myGuessIs();
			if (myguess == -1) {
				JOptionPane.showMessageDialog(null, &quot;I don't think your number exists.\n I could be wrong though...&quot;, &quot;Mistake&quot;, JOptionPane.INFORMATION_MESSAGE);
				System.exit(0);
			}
			String userInput = JOptionPane.showInputDialog(&quot;I guess your number is &quot; + myguess + &quot;. How many digits did I guess correctly?&quot;);
			// quit if the user input nothing (such as pressed ESC)
			if (userInput == null)
				System.exit(0);
			// parse user input, pop up a warning message if the input is invalid
			try {
				numMatches = Integer.parseInt(userInput.trim());
			}
			catch(Exception exception) {
				JOptionPane.showMessageDialog(null, &quot;Your input is invalid. Please enter a number between 0 and 4&quot;, &quot;Warning&quot;, JOptionPane.WARNING_MESSAGE);
				numMatches = 0;
			}
			// the number of matches must be between 0 and 4
			if (numMatches &lt; 0 || numMatches &gt; 4) {
				JOptionPane.showMessageDialog(null, &quot;Your input is invalid. Please enter a number between 0 and 4&quot;, &quot;Warning&quot;, JOptionPane.WARNING_MESSAGE);
				numMatches = 0;
			}
			if (numMatches == 4)
				break;
			// update based on user input
			gamer.updateMyGuess(numMatches);
			
		} while (true);
		
		// the game ends when the user says all 4 digits are correct
		System.out.println(&quot;Aha, I got it, your number is &quot; + myguess + &quot;.&quot;);
		System.out.println(&quot;I did it in &quot; + gamer.totalNumGuesses() + &quot; turns.&quot;);
	}
}</pre>
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Pastable version of number guessing game 1000 to 9999