How to display array data in a grid?

I 've been stuck on this for ages and it's for classwork. Basically I'm trying to display array data into a text box, which will then be updated randomly. Please bear in mind I started coding recently and I barely get what I'm even doing.

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.util.Scanner;
import java.io.*;
import java.awt.Color;
import java.awt.Font;
import java.awt.Image;
import java.util.Collections;
import java.util.*;

/**
 * Write a description of class myWorld here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class myWorld extends World

{
    /**
     * Constructor for objects of class myWorld.
     * 
     */
    public myWorld()
    {    
        // Create a new world with 600x400 cells with a cell size of 1x1 pixels.
        super(600, 400, 1);


        String[] list = new String[10];



        int count = 0;
        try{
            Scanner s = new Scanner(new BufferedReader(new FileReader("words.txt")));
            while(s.hasNext()) {
                String item = s.next();
                item.trim();
                list[count] = item;
                count++;

            }

            s.close();

            for(int x = 0; x < 1; x++){




            }




        }
        catch(IOException ex)
        {
            System.out.println("Cannot read file");
            System.exit(0);

        }
        grid grid1 = new grid();
        addObject(grid1, 200, 200);

        Random rgen = new Random();
        for(int i=0; i<1; i++){
            int randomPosition = rgen.nextInt(list.length);
            String temp = list[i];
            list[i] = list[randomPosition];
            list[randomPosition] = temp;
            System.out.println(list[0] + " " + list[1] + " " + list[2]);
            System.out.println(list[3] + " " + list[4] + " " + list[5]);
            System.out.println(list[6] + " " + list[7] + " " + list[8]);
        }


    }


    }

That is my myWorld code. Below is the code for the grid.

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.awt.Color;
import java.awt.Font;
import java.awt.*;
/**
 * Write a description of class grid here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class grid extends Actor
{
    /**
     * Act - do whatever the grid wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 

    {

        {


            GreenfootImage imgGrid = new GreenfootImage(355, 355);

            imgGrid.setColor(new Color (0, 0, 255));
            imgGrid.drawRect(0, 0, 350, 350);
            imgGrid.drawLine(0, 350/3, 350, 350/3);
            imgGrid.drawLine(0, (350/3)*2, 350, (350/3)*2);
            imgGrid.drawLine(350/3, 0, 350/3, 350);
            imgGrid.drawLine((350/3*2), 0, (350/3*2), 350);
            Font font = new Font("Wide Latin", Font.BOLD, 25);
            imgGrid.setFont(font);
            imgGrid.drawString("night", 10, 30);
            imgGrid.drawString("cell2", 125, 30);
            imgGrid.drawString("cell3", 250, 30);
            imgGrid.drawString("cell4", 10, 150);
            imgGrid.drawString("cell5", 125, 150);
            imgGrid.drawString("cell6", 250, 150);
            imgGrid.drawString("cell7", 10, 275);
            imgGrid.drawString("cell8", 125, 275);
            imgGrid.drawString("cell9", 250, 275);
            setImage(imgGrid);
        }
    }


    }