Shell Sort Program in Java

This is a java program to implement Shell Sort Algorithm.

Here is the source code of the Java Program to Implement Shell Sort. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

//This is a program to sort numbers using Shell Sort

```
import java.util.Random;
```
```
 
```
```
public class Shell_Sort 
```
```
{
```
```
    public static int N = 20;
```

    public static int[] sequence = new int[N];

```
 
```
```
    public static void shellSort() 
```
```
    {
```

        int increment = sequence.length / 2;

```
        while (increment > 0) 
```
```
        {
```

            for (int i = increment; i < sequence.length; i++)

```
            {
```
```
                int j = i;
```
```
                int temp = sequence[i];
```

                while (j >= increment && sequence[j - increment] > temp)

```
                {
```

                    sequence[j] = sequence[j - increment];

```
                    j = j - increment;
```
```
                }
```
```
                sequence[j] = temp;
```
```
            }
```
```
            if (increment == 2)
```
```
                increment = 1;
```
```
            else
```

                increment *= (5.0 / 11);

```
 
```
```
        }
```
```
    }
```
```
 
```

    static void printSequence(int[] sorted_sequence)

```
    {
```

        for (int i = 0; i < sorted_sequence.length; i++)

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

```
    }
```
```
 
```

    public static void main(String args[])

```
    {
```
```
        System.out
```

                .println("Sorting of randomly generated numbers using SHELL SORT");

```
        Random random = new Random();
```
```
 
```
```
        for (int i = 0; i < N; i++)
```

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

```
 
```

        System.out.println("\nOriginal Sequence: ");

```
        printSequence(sequence);
```
```
 
```

        System.out.println("\nSorted Sequence: ");

```
        shellSort();
```
```
        printSequence(sequence);
```
```
    }
```
```
}
```

Output:

$ javac Shell_Sort.java
$ java Shell_Sort
 
Sorting of randomly generated numbers using BUBBLE SORT
 
Original Sequence: 
67 57 55 13 83 80 29 89 30 46 68 71 6 12 5 3 68 8 18 6 
Sorted Sequence: 
3 5 6 6 8 12 13 18 29 30 46 55 57 67 68 68 71 80 83 89

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