Happy number program in Java | ICSE ISC Computer

A happy number is a number in which the eventual sum of the square of the digits of the number is equal to 1.

Example:
28 = ( 2 )^2 + ( 8 )^2 = 4 + 64 = 68$
68 = ( 6 )^2 + ( 8 )^2 = 36 + 64 = 100$
100 = ( 1 )^2 + ( 0 )^2 + ( 0 )^2= 1 + 0 + 0 = 1$

Hence, 28 is a happy number.
Example: 12 = ( 1 )^2 + ( 2 )^2 = 1 + 4 = 5$
Hence, 12 is not a happy number.

Design a class happy to check if a given number is a happy number.

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