Thread: Need this to end when a negative number is entered

I'm hung up here on how to get this to end when a negative number is entered. I want the user to enter 10 integers into an array. After those are entered, the program will sum and average the data. Inputs and outputs use JOptionPane. When a negative number is entered, the program should end. That's where I'm stuck. The while statement is what I can't seem to figure out. Any pointers? Have I given enough information for what I am asking?

import java.text.NumberFormat;
import java.text.DecimalFormat;
import javax.swing.*;
 
public class Array
{
    public static void main(String args[])
    {
        int checkNumber =0;
        int inputArray[] = new int[10]; 
        int arrayLength = inputArray.length;
        Boolean keepRunning = new Boolean (true);
 
            for(int i=0;i<arrayLength;i++) 
            checkNumber = Integer.parseInt(JOptionPane.showInputDialog("Enter integer for array location "+i+" :")); 
 
            while (checkNumber>=0)
        {
            int sum = 0;
            String loc = "";
 
            for(int i=0; i<arrayLength; i++)
            {
                sum+= inputArray[i];
                loc+= "Array location " + i + " is " + inputArray[i] + "\n";
            }
 
             double avg;
             NumberFormat formatter = new DecimalFormat ("#0.000");
             avg =(double)sum/10;
 
 
             JOptionPane.showMessageDialog (null, loc + "The sum or the array is " + sum + "\n The average of the array is " + formatter.format(avg));
         } 
 
 
     }       
 
}

if ( checkNumber < 0 ){
return;
}