Help incorporating a Joption Pane

Hello, I'm trying to get the final product of this single code to have the inputs/outputs displayed with a JOption Pane. I'm unfamiliar with how to write and incorporate a separate getData class and wondering if someone could show me?

This class accepts values until a negative value is entered and then averages without said negative value

Code :

import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
public class TestWindReadings{
    public static void main(String[] args){
    int min;
    int max;
    int count=0;
    int sum=0;
    Scanner scan=new Scanner(System.in);
    System.out.print("Enter wind speed reading ");
    System.out.print("Enter wind speed: ");
    int cmd=scan.nextInt();
    max=cmd;
    min=cmd;
    sum+=cmd;
    count++;
    while(cmd>=0){
        if(cmd<min){
           min=cmd;
        }
        else if(cmd>max){
           max=cmd;
        }
        sum+=cmd;
        count++;
        System.out.print("Enter windspeed: ");
        cmd=scan.nextInt();
    }
    if(count>1){
        System.out.println("High: " +max);
        System.out.println("Low: " +min);
        System.out.println("Count: "+ (count-1));
        System.out.println("Avg : " +sum/count);
    }
}
}