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This Java program checks whether a given number is an Armstrong number. An Armstrong number (or Narcissistic number) is a number that equals the sum of its digits each raised to the power of the number of digits. The program includes:
1.A method to calculate the power of a digit.
2.A method to determine the number of digits (order) of the number.
3.Logic to check if the sum of the powered digits equals the original number.
Tested with example values like 153 (Armstrong) and 1253 (non-Armstrong).