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Artemis: Refactor PrimeFactors method to use ArrayList instead of Vector #58

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Artemis: Refactor PrimeFactors method to use ArrayList instead of Vector #58

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10 changes: 5 additions & 5 deletions app/src/main/java/algorithms/Primes.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
package algorithms;
import java.util.Vector;
import java.util.ArrayList;

public class Primes {
/**
Expand Down Expand Up @@ -40,10 +40,10 @@ public static int SumPrimes(int n) {
* Finds all primes factors of a number
*
* @param n The number to find the prime factors of.
* @return An vector of all prime factors of n.
* @return An array list of all prime factors of n.
*/
public static Vector<Integer> PrimeFactors(int n) {
Vector<Integer> ret = new Vector<Integer>();
public static ArrayList<Integer> PrimeFactors(int n) {
ArrayList<Integer> ret = new ArrayList<Integer>();

for (int i = 2; i * i <= n; i++) { // Optimized loop condition
while (n % i == 0 && IsPrime(i)) { // Optimized to handle repeated factors
Expand All @@ -56,4 +56,4 @@ public static Vector<Integer> PrimeFactors(int n) {
}
return ret;
}
}
}