(Solved) : Java Problem Input Output Stream Could Someone Look Codes M Able Save Game Life Txt File M Q27920420 . . . .

Java problem (input and output stream)!! Could someone have alook at my codes? I’m able to save my game of life into a txt filebut I’m not able to restore/load it from the txt. Am I missingsomething?

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import java.io.*;
//import java.io.Serializable;

public class runMain extends JFrame implements ActionListener,Runnable {
  
// Label the number of generation
private JLabel generationLabel;
  
// Label the start/stop/reset buttons
private JButton start;
private JButton stop;
private JButton restart;
private JButton save;
private JButton restore;
  
private JFileChooser fileChooser;
// The inital number of generation
private int generation = 0;
  
// Thread clas object
private Thread t;
private boolean flag = true;
  
// Label the cells
private MarkLabel[][] mark;
  
// Declare state of