Question

I have a number 0127

i am trying logic to generate number following sequence in JAVA

0
1
2
7
01
12
27
012
127
0127
1270
2701
7012
01270
12701
27012
.
.

I am breaking my head 🙂

Answer 1

I would convert the number to a String object, then to an array of chars.

From there, you can iterate over the array with the following logic:

        int MAX_LENGTH = 10;
        char[] array = "0127".ToCharArray();
        for (int i = 0; i < MAX_LENGTH; i++)
        {
            for (int offset = 0; offset < array.Length; offset++)
            {
                String disp = "";
                for (int j = 0; j <= i; j++)
                {
                    int index = j + offset;
                    while (index >= array.Length)
                        index -= array.Length;
                    disp += array[index];
                }
                Console.WriteLine(disp);
            }
        }

Change MAX_LENGTH to be what ever the maximum length of the output string should be.

Here is the output that this code produces: