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public static List countingSort(List arr) {
Map countMap = new HashMap<>();
List result = new ArrayList<>();
for (int i = 0; i< 100; i++) {
countMap.put(i, 0);
}
for (int num : arr) {
int value = countMap.get(num);
countMap.put(num, value + 1);
}
for (int i = 0; i < 100; i++) {
result.add(countMap.get(i));
}
return result;
}
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Counting Sort 1
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Java 8:
public static List countingSort(List arr) { Map countMap = new HashMap<>(); List result = new ArrayList<>(); for (int i = 0; i< 100; i++) { countMap.put(i, 0); }
for (int num : arr) { int value = countMap.get(num); countMap.put(num, value + 1); }
for (int i = 0; i < 100; i++) { result.add(countMap.get(i)); }
return result;
}