Write a complete Java program that inputs a number from the user. Then, your program will display the below shape based on the input number. You need to use a loop structure in order to solve the problem. Assume that the user will enter a positive integer number.

Sample Output 1: Please enter a number: 5 1 2 1 2 3 2 1 2 3 4 3 2 1 2 3 4 5 4 3 2 1 2 3 4 5 4 3 2 1 2 3 4 3 2 1 2 3 2 1 2 1 Sample Output 2: Please enter a number: 3 1 2 1 2 3 2 1 2 3 2 1 2 1