package test; /** * Metodo per la stampa di tutte le pertutazioni di una stringa * @author Abejan * @version 15/01/2011 */ public class Permutazioni { // Procedura ricorsiva che stampa le TUTTE le permutazioni public static void permute(int level, String permuted, boolean used[], String original) { int length = original.length(); if (level == length) { //permutazione completa System.out.println("Permutazione = " + permuted); } else { for (int i = 0; i < length; i++) { if(!used[i]){ used[i]=true; permute(level+1,original.charAt(i)+permuted,used,original); used[i]=false; } } } } public static void main(String[] args) { //inizializzazione stringa da permutare String s="abc"; //arrary di lunghezza della stringa per gestione dei flag boolean used[]; used = new boolean[3]; //lancio le permutazioni e stampo permute(0, "", used, s); } }
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