May 27, 2010 · For example I have this array: int a[] = new int[]{3,4,6,2,1}; I need list of all permutations such that if one is like this, {3,2,1,4,6}, others must not be the same.

Aug 23, 2013 · Java: Permutation of array. Ask Question Asked 11 years, 7 months ago. Modified 4 years, 2 months ago ...

Nov 21, 2010 · What is an elegant way to find all the permutations of a string. E.g. permutation for ba, would be ba and ab, but what about longer string such as abcdefgh? Is there any Java implementation example?

May 22, 2015 · Specifically, note that there are by definition N! permutations of a length N array - N choices for the first slot, N-1 choices for the 2nd, etc etc. So, we can break an algorithm down into two steps for each index i in the array. Select an element in the sub-array arr[i....end] to be the ith element of the array.

Mar 1, 2015 · Here is a full example: package eric.math; import java.util.Arrays; public class Permute { // swap 2 elements of an array, void swap(int[] arr, int x, int y) { int ...

What is the best way to generate a random permutation of n numbers? For example, say I have a set of numbers 1, 2 and 3 (n = 3) Set of all possible permutations: {123, 132, 213, 231, 312, 321} Now, how do I generate: one of the elements of the above sets (randomly chosen) a whole permutation set as shown above

import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; /** * Permuation Application * This class works out all permutations of a given set of elements * * @author arshadmayet * */ public class Permutation { public static final String EMPTY_STRING = ""; /** * DFS Algorithm to find all ...

Aug 15, 2012 · You can simply wrap it into another iterator that converts the permutation of numbers into a permutation of your array elements. (Note that you cannot just replace int[] within the iterator with an arbitrary array/list. The algorithm needs to work with numbers.)

Jan 19, 2015 · See the code here for permutation of numbers : Java code for permutation of a list of numbers. And now in your case, the list of numbers will be nothing but the list of indices for the ArrayList of strings. So basically permutation of indices will lead to permutation of the strings.

I have a working example to generate all char permutations in a String as below: static ArrayList<String&gt; permutations(String s) { if (s == null) { return null; }...