I need help creating an AI for a TicTacToe game programmed i

I need help creating an AI for a Tic-Tac-Toe game programmed in JAVA. It is a human vs computer game, how do I create an AI?

Computer must be aggressive and take every opportunity to win the game, block the user from winning and if the human makes a mistake, then the computer will capitalize on it and win if possible.

Also no infinite loops for(;;) while(true)

Thank you.

Solution

Answer:

import java.util.*;

public class TicTacToeGame
{
private int counter;
private char location[]=new char[10];
private char player;
  
  
public static void main(String args[])
{
String ch;
TicTacToeGame Toe=new TicTacToeGame();
do{
Toe.beginBoard();
Toe.play_game();
System.out.println (\"Press Y to play the game again \");
Scanner in =new Scanner(System.in);
ch=in.nextLine();
System.out.println(\"ch value is \"+ch);
}while (ch.equals(\"Y\"));
  
  
}
public void beginBoard()
{
  
char locationdef[] = {\'0\',\'1\', \'2\', \'3\', \'4\', \'5\', \'6\', \'7\', \'8\', \'9\'};
int i;
counter = 0;
player = \'X\';
for (i=1; i<10; i++) location[i]=locationdef[i];
presentBoard();
  
  
}
public String presentBoard()
{
System.out.println( \"\ \ \" );
System.out.println( \"\ \ \" );
System.out.println( \"\ \ \\t\\t\" + location [1] + \" | \" +location [2]+ \" | \" +location [3]);
System.out.println( \" \\t\\t | | \" );
System.out.println( \" \\t\\t ___|____|___ \" );
System.out.println( \"\ \ \\t\\t\" +location [4]+ \" | \" +location [5]+ \" | \" +location [6]);
System.out.println( \" \\t\\t | | \" );
System.out.println( \" \\t\\t ___|____|___ \" );
System.out.println( \"\ \ \\t\\t\" +location [7]+ \" | \" +location [8]+ \" | \" +location [9]);
System.out.println( \" \\t\\t | | \" );
System.out.println( \" \\t\\t | | \" );
System.out.println( \"\ \ \" );
return \"presentBoard\";
}
  
public void play_game()
{
int spot;
char blank = \' \';
  
System.out.println( \"Player \" + getPlayer() +\" will go first and be the letter \'X\'\" );
  
do {
presentBoard();
  
System.out.println( \"\ \ Player \" + getPlayer() +\" choose a location.\" );
  
boolean posTaken = true;
while (posTaken) {
  
Scanner in =new Scanner (System.in);
spot=in.nextInt();
posTaken = checklocation(spot);
if(posTaken==false)
location[spot]=getPlayer();
}
  
System.out.println( \"Nice move.\" );
  
presentBoard();
  
nextPlayer();
}while ( getWinner() == blank );
  
}
  
public char getWinner()
{
char Winner = \' \';
  
  
if (location[1] == \'X\' && location[2] == \'X\' && location[3] == \'X\') Winner = \'X\';
if (location[4] == \'X\' && location[5] == \'X\' && location[6] == \'X\') Winner = \'X\';
if (location[7] == \'X\' && location[8] == \'X\' && location[9] == \'X\') Winner = \'X\';
if (location[1] == \'X\' && location[4] == \'X\' && location[7] == \'X\') Winner = \'X\';
if (location[2] == \'X\' && location[5] == \'X\' && location[8] == \'X\') Winner = \'X\';
if (location[3] == \'X\' && location[6] == \'X\' && location[9] == \'X\') Winner = \'X\';
if (location[1] == \'X\' && location[5] == \'X\' && location[9] == \'X\') Winner = \'X\';
if (location[3] == \'X\' && location[5] == \'X\' && location[7] == \'X\') Winner = \'X\';
if (Winner == \'X\' )
{System.out.println(\"Player1 wins the game.\" );
return Winner;
}
  
  
if (location[1] == \'O\' && location[2] == \'O\' && location[3] == \'O\') Winner = \'O\';
if (location[4] == \'O\' && location[5] == \'O\' && location[6] == \'O\') Winner = \'O\';
if (location[7] == \'O\' && location[8] == \'O\' && location[9] == \'O\') Winner = \'O\';
if (location[1] == \'O\' && location[4] == \'O\' && location[7] == \'O\') Winner = \'O\';
if (location[2] == \'O\' && location[5] == \'O\' && location[8] == \'O\') Winner = \'O\';
if (location[3] == \'O\' && location[6] == \'O\' && location[9] == \'O\') Winner = \'O\';
if (location[1] == \'O\' && location[5] == \'O\' && location[9] == \'O\') Winner = \'O\';
if (location[3] == \'O\' && location[5] == \'O\' && location[7] == \'O\') Winner = \'O\';
if (Winner == \'O\' )
{
System.out.println( \"Player2 wins the game.\" );
return Winner; }
  

for(int i=1;i<10;i++)
{
if(location[i]==\'X\' || location[i]==\'O\')
{
if(i==9)
{
char Draw=\'D\';
System.out.println(\" Game is stalemate \");
return Draw;
}
continue;
}
else
break;
  
}
  
return Winner;
}
  
public boolean checklocation(int spot)
{
  
  
if (location[spot] == \'X\' || location[spot] == \'O\')
{
System.out.println(\"That location is already taken, please choose another\");
return true;
}
else {
return false;
}
  
  
  
}
  
  
  
public void nextPlayer()
{
if (player == \'X\')
player = \'O\';
else player = \'X\';
  
}
  
public String getTitle()
{
return \"Tic Tac Toe\" ;
}
  
public char getPlayer()
{
return player;
}
  
}