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Generating all permutations of a string is a common problem that can be solved efficiently using recursion and backtracking. Below is a clean Java implementation to print all permutations of a given string.
Steps to Implement
Base Case: If the starting index equals the ending index, print the string.
Recursive Case: Swap each character with the starting character, recursively permute the rest, then backtrack by swapping back.
Java Code Example
public class Permutation {public static void main(String[] args) {String str = "ABC";permute(str, 0, str.length() - 1);}// Function to generate permutationsprivate static void permute(String str, int left, int right) {if (left == right) {System.out.println(str);} else {for (int i = left; i <= right; i++) {str = swap(str, left, i); // Swap current index with loop indexpermute(str, left + 1, right); // Recurse for the reststr = swap(str, left, i); // Backtrack}}}// Utility function to swap characters in a stringprivate static String swap(String s, int i, int j) {char[] charArray = s.toCharArray();char temp = charArray[i];charArray[i] = charArray[j];charArray[j] = temp;return String.valueOf(charArray);}}Gekopieerd.✕Kopiëren Java Program to print all permutations of a given string
23 jul. 2025 · Please see the below link for a solution that prints only distinct permutations even if there are duplicates in input. Print all distinct permutations …
Permutations of an Array in Java - Baeldung
Meer bekijken op baeldung.comIn this article, we’ll look at how to create permutations of an array. First, we’ll define what a permutation is. Second, we’ll look at some constraints. And third, we’ll look at three ways to calculate them: recursively, iteratively, and randomly. We’ll focus on the implementation in Java and, therefore, won’t go into a lot of mathematical detail.- Gepubliceerd: 9 jan. 2019
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3 aug. 2022 · That’s all for finding all permutations of a String in Java. You can download the example program code from our GitHub Repository. Thanks for learning with the DigitalOcean Community. …
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