Java

private Peg currentPeg;
private Peg[][] cells = new Peg[SIZE][SIZE];

public Peg checkRowMatch() {
    for (int i = 0; i < SIZE; i++) {
        if(cells[i][0]== cells[i][1] && cells[i][1] == cells[i][2] && cells[i][0] != Peg.NONE){
            return cells[i][0];
        }
    }
    return Peg.NONE;
}

public Peg checkColumnMatch() {
    for (int j = 0; j < SIZE; j++) {
        if(cells[0][j]== cells[1][j] && cells[1][j] == cells[2][j] && cells[0][j] != Peg.NONE){
            return cells[0][j];
        }
    }
    return Peg.NONE;
}

public enum Peg {NONE, FIRST, SECOND};

import java.awt.BorderLayout;
import javax.swing.*;

public class ToolBar extends JFrame {
    
    JToolBar tb;
    JButton exit;
    
    public ToolBar(){
    
        setSize(400,400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        tb = new JToolBar();
        exit = new JButton("Exit");
        tb.add(exit);
        add(tb,BorderLayout.WEST);
    }

public FrmItemTypes() {
      initComponents();

     ToolBar t = new ToolBar();
     t.setVisible(true);
  }

FrmItemTypes ft = new FrmItemTypes();
   this.desktopPane.add(ft);
   ft.setVisible(true);

ToolBar t = new ToolBar();
      t.setVisible(true);

Hello! I am new to Java and am looking for a source code for automatic license plate recognition.
someone can help me?
thank you in advance.