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100 lines
2.9 KiB
Java
100 lines
2.9 KiB
Java
/*
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This is a java program to generate and print all the permutation of the Numbers.
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User first enters the element in the set and then actual elements. The notion of permutation relates to the act of permuting, or
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rearranging, members of a set into a particular sequence or order (unlike combinations, which are selections that disregard order). For example,
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there are six permutations of the set {1,2,3}, namely (1,2,3), (1,3,2), (2,1,3), (2,3,1), (3,1,2), and (3,2,1).
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*/
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//This is a java program to perform all permutation of given list of numbers of a specific length
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import java.util.Random;
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import java.util.Scanner;
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public class Permute_All_List_Numbers
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{
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static void permute(int[] a, int k)
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{
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if (k == a.length)
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{
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for (int i = 0; i < a.length; i++)
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{
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System.out.print(" [" + a[i] + "] ");
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}
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System.out.println();
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}
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else
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{
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for (int i = k; i < a.length; i++)
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{
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int temp = a[k];
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a[k] = a[i];
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a[i] = temp;
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permute(a, k + 1);
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temp = a[k];
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a[k] = a[i];
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a[i] = temp;
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}
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}
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}
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public static void main(String args[])
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{
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Random random = new Random();
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Scanner sc = new Scanner(System.in);
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System.out.println("Enter the length of list: ");
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int N = sc.nextInt();
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int[] sequence = new int[N];
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for (int i = 0; i < N; i++)
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sequence[i] = Math.abs(random.nextInt(100));
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System.out.println("The original sequence is: ");
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for (int i = 0; i < N; i++)
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System.out.print(sequence[i] + " ");
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System.out.println("\nThe permuted sequences are: ");
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permute(sequence, 0);
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sc.close();
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}
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}
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/*
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Enter the length of list:
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3
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The original sequence is:
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15 61 16
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The permuted sequences are:
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[15] [61] [16]
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[15] [16] [61]
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[61] [15] [16]
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[61] [16] [15]
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[16] [61] [15]
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[16] [15] [61]
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Enter the length of list:
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4
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The original sequence is:
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50 98 4 61
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The permuted sequences are:
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[50] [98] [4] [61]
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[50] [98] [61] [4]
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[50] [4] [98] [61]
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[50] [4] [61] [98]
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[50] [61] [4] [98]
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[50] [61] [98] [4]
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[98] [50] [4] [61]
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[98] [50] [61] [4]
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[98] [4] [50] [61]
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[98] [4] [61] [50]
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[98] [61] [4] [50]
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[98] [61] [50] [4]
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[4] [98] [50] [61]
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[4] [98] [61] [50]
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[4] [50] [98] [61]
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[4] [50] [61] [98]
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[4] [61] [50] [98]
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[4] [61] [98] [50]
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[61] [98] [4] [50]
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[61] [98] [50] [4]
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[61] [4] [98] [50]
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[61] [4] [50] [98]
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[61] [50] [4] [98]
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[61] [50] [98] [4] |