NiteshPatil

public class NiteshPatil {
    public static void main(String[] args) {
        boolean reverse;
        for(int i = 1; i <= 7; i++) {
            reverse = false;
            for(int j = 1; j != 0 ; j = (reverse ? --j : ++j)) {
                if(j == i) reverse = true;
                System.out.print(j);
            }
            System.out.println();
        }
    }
}