private boolean checkWinner(Character board[][]){
		int i=0,j=0;
		//for player1
		if(board[0][9].owner == -1 || board[1][9].owner == -1 || board[2][9].owner == -1 || board[3][9].owner == -1 ){
			sendWinner(PLAYER1);
			//JOptionPane.showMessageDialog(null, "PLAYER1 wins!");
			return true;
		}
		else if(board[0][0].owner == -1 || board[1][0].owner == -1 || board[2][0].owner == -1 || board[3][0].owner == -1 ){
			//JOptionPane.showMessageDialog(null, "PLAYER2 wins!");
			sendWinner(PLAYER2);
			return true;
		}
		return false;
	}