Java Program to Generate All Possible Combinations of a Given List of Numbers

This is a java program to generate sequence of N characters randomly.

Here is the source code of the Java Program to Generate a Sequence of N Characters for a Given Specific Case. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

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// Specific case is that characters are generated randomly

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package com.sanfoundry.combinatorial;
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import java.util.Scanner;
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public class SequenceOfNCharacters
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{
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    public static Integer randomInt(Integer low, Integer high)

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    {
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        return (int) (Math.floor(Math.random() * (high - low + 1)) + low);

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    }
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    public static Character randomChar(String str)

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    {
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        return str.charAt(randomInt(0, str.length() - 1));

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    }
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    public static String generateRandSeq(Integer length, String src)

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    {
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        String seq = "";
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        for (int i = 1; i <= length; i = i + 1)

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        {
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            seq += randomChar(src);
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        }
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        return seq;
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    }
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    public static void main(String[] args)

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    {
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        String src = "abcdefghijklmnopqrstuvwxyz";

        Scanner sc = new Scanner(System.in);

        System.out.println("Enter the number of sequences to be generated: ");

        int numberOfSequence = sc.nextInt();

        System.out.println("Enter the length of each sequence: ");

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        int length = sc.nextInt();
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        for (int i = 0; i < numberOfSequence; i++)

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        {
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            System.out.println(generateRandSeq(length, src));

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        }
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        sc.close();
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    }
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}
```

Output:

$ javac SequenceOfNCharacters.java
$ java SequenceOfNCharacters
 
Enter the number of sequences to be generated: 
4
Enter the length of each sequence: 
5
qgpnt
kdxyr
ynhmf
wambi
 
Enter the number of sequences to be generated: 
3
Enter the length of each sequence: 
8
ilhddizq
evmpejxv
malvlhja

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