Program II: Write a recursive method to print all permutations of a string. Then a write a…

Program II: Write a recursive method to print all permutations of a string. Then a write a program to test the method, by once again, prompting the user to enter a string of characters. For example, the permutations for the string “abc” are the following:


Hint: Define the following two methods. The second is a helper method.

public static void displayPermutation(String s)
public static void displayPermutation(String s1, String s2)

The first method simply invokes displayPermutation(“”, s). The second method uses a loop to move a character from s2 to s1 and recursively invokes it with new s1 and s2. The base case is that s2 is empty and prints s1 to the console.

Write a test program that prompts the user to enter a string and displays all of its permutations.

This program is the same as Exercise 18.25 of the textbook, page 746.

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