Java Program
Write a menu driven test program that prompts the user to choosewhich of your methods to test
out or to exit. The user is then to enter his/her choice:
1. In the case of string permutation they enter a string and theprogram displays all its permutations,
then returns to the menu.
2. In the case of the hex the user enters a hex string and theprogram displays its decimal equivalent,
then returns to the menu.
3. In the case of the binary the user to enters a binary string andthe program displays its decimal
equivalent, then returns to the menu.
4. In the case of the decimal
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