60 lines
1.3 KiB
Java
60 lines
1.3 KiB
Java
package Sorts;
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import java.util.Arrays;
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class RadixSort {
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private static int getMax(int[] arr, int n) {
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int mx = arr[0];
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for (int i = 1; i < n; i++)
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if (arr[i] > mx)
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mx = arr[i];
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return mx;
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}
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private static void countSort(int[] arr, int n, int exp) {
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int[] output = new int[n];
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int i;
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int[] count = new int[10];
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Arrays.fill(count, 0);
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for (i = 0; i < n; i++)
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count[(arr[i] / exp) % 10]++;
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for (i = 1; i < 10; i++)
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count[i] += count[i - 1];
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for (i = n - 1; i >= 0; i--) {
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output[count[(arr[i] / exp) % 10] - 1] = arr[i];
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count[(arr[i] / exp) % 10]--;
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}
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for (i = 0; i < n; i++)
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arr[i] = output[i];
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}
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private static void radixsort(int[] arr, int n) {
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int m = getMax(arr, n);
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for (int exp = 1; m / exp > 0; exp *= 10)
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countSort(arr, n, exp);
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}
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static void print(int[] arr, int n) {
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for (int i = 0; i < n; i++)
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System.out.print(arr[i] + " ");
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}
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public static void main(String[] args) {
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int[] arr = {170, 45, 75, 90, 802, 24, 2, 66};
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int n = arr.length;
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radixsort(arr, n);
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print(arr, n);
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}
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}
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// Written by James Mc Dermott(theycallmemac)
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