Java Program to Generate Random Partition from Given Set

This is a java program to generate a random partitioning of a set of characters or numbers in to two sets. Randomly generate an index less than the total number of elements in the set.

Here is the source code of the Java Program to Generate Random Partition out of a Given Set of Numbers or Characters. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

//This is a java program to perform partitioning at random index and generate two sets for given set of numbers or characters

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import java.util.Random;
```
```
import java.util.Scanner;
```
```
 
```
```
public class Random_Partition 
```
```
{
```

    public static void main(String args[])

```
    {
```
```
        Random random = new Random();
```

        Scanner sc = new Scanner(System.in);

```
 
```
```
        int noc = random.nextInt(2);
```

        // if noc is equal to 1 generate numbers

```
        if (noc == 1) 
```
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        {
```
```
            int N = 10;
```

            int[] sequence = new int[N];

            System.out.print("The Original set of numbers are:\n  ");

            for (int i = 0; i < N; i++)

```
            {
```

                sequence[i] = Math.abs(random.nextInt(100));

                System.out.print(sequence[i] + " ");

```
            }
```
```
 
```

            int partition_index = random.nextInt(11);

            System.out.println("\nThe two sequemces are: ");

```
            System.out.print("{ ");
```

            for (int i = 0; i < N; i++)

```
            {
```

                if (i == partition_index)

                    System.out.print(" } and { ");

                System.out.print(sequence[i] + " ");

```
            }
```
```
            System.out.print("}");
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            System.out
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                    .println("\nPartitioning around index " + partition_index);

```
 
```
```
        }
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        // else generate characters
```
```
        else
```
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        {
```
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            int N = 10;
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            char[] sequence = new char[N];

            System.out.print("The Original set of characters are:\n  ");

            for (int i = 0; i < N; i++)

```
            {
```

                sequence[i] = (char) Math.abs(random.nextInt(123 - 97) + 97);

                System.out.print(sequence[i] + " ");

```
            }
```
```
 
```

            int partition_index = random.nextInt(11);

            System.out.println("\nThe two sequences are: ");

```
            System.out.print("{ ");
```

            for (int i = 0; i < N; i++)

```
            {
```

                if (i == partition_index)

                    System.out.print(" } and { ");

                System.out.print(sequence[i] + " ");

```
            }
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            System.out.print("}");
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            System.out
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                    .println("\nPartitioning around index " + partition_index);

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

Output:

$ javac Random_Partition.java
$ java Random_Partition
 
The Original set of numbers are:
  70 13 10 36 78 98 18 64 60 84 
The two sequences are: 
{ 70 13 10 36 78 98 18 64  } and { 60 84 }
Partitioning around index 8
 
The Original set of characters are:
  n p r e m z y o x p 
The two sequences are: 
{ n p r e m z  } and { y o x p }
Partitioning around index 6

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