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BucketSort.java

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// Bucket sort in Java

import java.util.ArrayList;

import java.util.Collections;

public class BucketSort {

public void bucketSort(float[] arr, int n) {

if (n <= 0)

return;

@SuppressWarnings("unchecked")

ArrayList<Float>[] bucket = new ArrayList[n];

// Create empty buckets

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

bucket[i] = new ArrayList<Float>();

// Add elements into the buckets

for (int i = 0; i < n; i++) {

int bucketIndex = (int) arr[i] * n;

bucket[bucketIndex].add(arr[i]);

}

// Sort the elements of each bucket

for (int i = 0; i < n; i++) {

Collections.sort((bucket[i]));

}

// Get the sorted array

int index = 0;

for (int i = 0; i < n; i++) {

for (int j = 0, size = bucket[i].size(); j < size; j++) {

arr[index++] = bucket[i].get(j);

}

// Driver code

public static void main(String[] args) {

BucketSort b = new BucketSort();

float[] arr = { (float) 0.42, (float) 0.32, (float) 0.33, (float) 0.52, (float) 0.37, (float) 0.47,

(float) 0.51 };

b.bucketSort(arr, 7);

for (float i : arr)

System.out.print(i + " ");

}