The following concepts must be included in project:

• 
  
  • Class
  • Object
  • Encapsulation 
  • Inheritance
  • Overriding
  • Overloading
  • Polymorphism
  • I/O files 
  • GUI

My code is below

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.Timer;
import javax.swing.*;

public class TicTacToe implements ActionListener {
// inheritance

// delcare variables
Random random = new Random();
Timer timer = new Timer();
JFrame frame = new JFrame();
JPanel titlePanel = new JPanel();
JPanel buttonPanel = new JPanel();
JLabel textfield = new JLabel();
JButton[] buttons = new JButton[9];
boolean player1Turn;
boolean tie = true;
int turns = 0;

TicTacToe() {
// GUI display parameters
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setSize(800, 800);
 frame.getContentPane().setBackground(new Color(50, 50, 50));
 frame.setLayout(new BorderLayout());
 frame.setVisible(true);
 frame.setTitle("Tic Tac Toe");
 
 textfield.setBackground(new Color(25, 25, 25));
 textfield.setForeground(new Color(25, 255, 0));
 textfield.setFont(new Font("MV Boli", Font.BOLD, 75));
 textfield.setHorizontalAlignment(JLabel.CENTER);
 textfield.setText("Juliets Tic-Tac-Toe");
 textfield.setOpaque(true);
 
 titlePanel.setLayout(new BorderLayout());
 titlePanel.setBounds(0, 0, 800, 100);
 
 buttonPanel.setLayout(new GridLayout(3, 3));
 
 for (int i = 0; i < 9; i++) {
 
  buttons[i] = new JButton();
  buttonPanel.add(buttons[i]);
  buttons[i].setFont(new Font("Ink free", Font.BOLD, 120));
  buttons[i].setFocusable(false);
  buttons[i].setEnabled(false);
  buttons[i].addActionListener(this);
 
 }
 
 titlePanel.add(textfield);
 frame.add(titlePanel, BorderLayout.NORTH);
 frame.add(buttonPanel);
 
 firstTurn();
}

@Override
public void actionPerformed(ActionEvent e) {
 
 for (int i = 0; i < 9; i++) {
  if(e.getSource()==buttons[i]) {
   if(player1Turn) {
    if(buttons[i].getText()=="") {
     buttons[i].setForeground(new Color(255, 0, 255));
     buttons[i].setText("X");
     turns++;
     player1Turn = false;
     textfield.setText("Mom's turn");
     check();
    }
   }
   else {
    if(buttons[i].getText()=="") {
     buttons[i].setForeground(new Color(0, 255, 255));
     buttons[i].setText("O");
     turns++;
     player1Turn = true;
     textfield.setText("Juliet's turn");
     check();
    }
   }
  }
 }
}

public void firstTurn() {
 
 timer.schedule(new TimerTask() {
    @Override
    public void run() {
     if(random.nextInt(2)==0) {
     player1Turn = true;
     textfield.setText("Juliet's turn");
     }
     else {
     player1Turn = false;
     textfield.setText("Mom's turn");
     }  
     for (int i = 0; i < 9; i++) {
     buttons[i].setEnabled(true);
     }
    }
 }, 3000);
}

public void check() {
 
 if((buttons[0].getText()=="X") && (buttons[1].getText()=="X") && (buttons[2].getText()=="X")) {
  xWins(0, 1, 2); tie = false;
 } if((buttons[3].getText()=="X") && (buttons[4].getText()=="X") && (buttons[5].getText()=="X")) {
  xWins(3, 4, 5); tie = false;
 } if((buttons[6].getText()=="X") && (buttons[7].getText()=="X") && (buttons[8].getText()=="X")) {
  xWins(6, 7, 8); tie = false;
 } if((buttons[0].getText()=="X") && (buttons[3].getText()=="X") && (buttons[6].getText()=="X")) {
  xWins(0, 3, 6); tie = false;
 } if((buttons[1].getText()=="X") && (buttons[4].getText()=="X") && (buttons[7].getText()=="X")) {
  xWins(1, 4, 7); tie = false;
 } if((buttons[2].getText()=="X") && (buttons[5].getText()=="X") && (buttons[8].getText()=="X")) {
  xWins(2, 5, 8); tie = false;
 } if((buttons[0].getText()=="X") && (buttons[4].getText()=="X") && (buttons[8].getText()=="X")) {
  xWins(0, 4, 8); tie = false;
 } if((buttons[2].getText()=="X") && (buttons[4].getText()=="X") && (buttons[6].getText()=="X")) {
  xWins(2, 4, 6); tie = false;
 }
 
 if((buttons[0].getText()=="O") && (buttons[1].getText()=="O") && (buttons[2].getText()=="O")) {
  oWins(0, 1, 2); tie = false;
 } if((buttons[3].getText()=="O") && (buttons[4].getText()=="O") && (buttons[5].getText()=="O")) {
  oWins(3, 4, 5); tie = false;
 } if((buttons[6].getText()=="O") && (buttons[7].getText()=="O") && (buttons[8].getText()=="O")) {
  oWins(6, 7, 8); tie = false;
 } if((buttons[0].getText()=="O") && (buttons[3].getText()=="O") && (buttons[6].getText()=="O")) {
  oWins(0, 3, 6); tie = false;
 } if((buttons[1].getText()=="O") && (buttons[4].getText()=="O") && (buttons[7].getText()=="O")) {
  oWins(1, 4, 7); tie = false;
 } if((buttons[2].getText()=="O") && (buttons[5].getText()=="O") && (buttons[8].getText()=="O")) {
  oWins(2, 5, 8); tie = false;
 } if((buttons[0].getText()=="O") && (buttons[4].getText()=="O") && (buttons[8].getText()=="O")) {
  oWins(0, 4, 8); tie = false;
 } if((buttons[2].getText()=="O") && (buttons[4].getText()=="O") && (buttons[6].getText()=="O")) {
  oWins(2, 4, 6); tie = false;
 }
 
 if(tie && turns == 9) {
  tie();
 }
}
public void xWins() {}
// Overriding
public void xWins(int a, int b, int c) {
 
 buttons[a].setBackground(Color.GREEN);
 buttons[b].setBackground(Color.GREEN);
 buttons[c].setBackground(Color.GREEN);
 for (int i = 0; i < 9; i++) {
  buttons[i].setEnabled(false);
 }
 textfield.setText("Juliet wins!");
 resetting();
}

public void oWins(int a, int b, int c) {
 
 buttons[a].setBackground(Color.GREEN);
 buttons[b].setBackground(Color.GREEN);
 buttons[c].setBackground(Color.GREEN);
 for (int i = 0; i < 9; i++) {
  buttons[i].setEnabled(false);
 }
 textfield.setText("Mom wins!");
 resetting();
}

public void tie() {
 
 for (int i = 0; i < 9; i++) {
  buttons[i].setEnabled(false);
 }
 textfield.setText("Tie!!!");
 resetting();
 
}

public void resetting() {
 firstTurn();
 timer.schedule(new TimerTask() {
 
    @Override
    public void run() {
     for (int i = 0; i < 9; i++) {
      buttons[i].setEnabled(true);
      buttons[i].setText("");
      buttons[i].setBackground(null);
     }
    }
 }, 3000);
}
}

 I have included to bolded items but not sure how to include the others or if they count as included.