public boolean is_Last() {
		boolean flag = false;
		boolean first = true;
		for (int i = 0; i < 4; i++) {
			for (int j = 0; j < 4; j++) {
				if ((board[i][j] == 0) && (!first)) {
					flag = false;
					return flag;
				}
				if ((board[i][j] == 0) && first) {
					flag = true;
					first = false;
				}
			}
		}
		return flag;
	}