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Cover image for Day 27: Bucket Sort

Day 27: Bucket Sort

mattryanmtl profile image Matt Ryan ・1 min read
import java.util.Random;



public class Bucket_Sort 

{

    static int[] sort(int[] sequence, int maxValue) 

    {

        // Bucket Sort

        int[] Bucket = new int[maxValue + 1];

        int[] sorted_sequence = new int[sequence.length];



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

            Bucket[sequence[i]]++;



        int outPos = 0;

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

            for (int j = 0; j < Bucket[i]; j++)

                sorted_sequence[outPos++] = i;



        return sorted_sequence;

    }



    static void printSequence(int[] sorted_sequence) 

    {

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

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

    }



    static int maxValue(int[] sequence) 

    {

        int maxValue = 0;

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

            if (sequence[i] > maxValue)

                maxValue = sequence[i];

        return maxValue;

    }



    public static void main(String args[]) 

    {

        System.out

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

        Random random = new Random();

        int N = 20;

        int[] sequence = new int[N];



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

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



        int maxValue = maxValue(sequence);



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

        printSequence(sequence);



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

        printSequence(sort(sequence, maxValue));

    }

}
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