Classic case of Java programming: solving rabbit problem based on Fibonacci sequence

This paper gives an example of how Java solves the rabbit problem based on Fibonacci sequence. Share with you for your reference, as follows:

Title: classical question: there is a pair of rabbits. They give birth to a pair of rabbits every month from the third month after birth. When the little rabbits grow to the third month, they give birth to another pair of rabbits every month. If the rabbits do not die, what is the total number of rabbits every month?

Operation results:

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