Our Highest Common Factor code in Java.
List Highest Common Factor Class File:
package arithmetic;
import java.util.ArrayList;
import java.util.List;
import java.util.Comparator;
public class HCF {
private final int[] set_of_numbers;
private final List<Integer> common_factors = new ArrayList<>(); // factors common to our set_of_numbers
private int index; // index into array common_factors
private boolean all_round_factor; // variable to keep state
private int calc_result; // helps calculate HCF
private Comparator c; // object for sorting arrays
public HCF(List<Integer> group) {
set_of_numbers = new int[group.size()];
index = 0;
group.sort(c);
//iterate through and retrieve members
for (int number : group) {
set_of_numbers[index] = number;
index++;
}
index = 2;
all_round_factor = false;
}
/**
* Our function checks 'set_of_numbers'; If it finds a factor common to
* all for it, it records this factor; then divides 'set_of_numbers' by the
* common factor found and makes this the new 'set_of_numbers'. It
* continues recursively until all common factors are found.
*/
private int findHCFFactors() {
while (index <= set_of_numbers[0]) {
// Check for factors common to every member of 'set_of_numbers'
all_round_factor = true;
for (int j = 0; j < set_of_numbers.length; j++) {
if (!(all_round_factor == true && (set_of_numbers[j] % index) == 0)) {
all_round_factor = false;
}
}
// Divide every member of 'set_of_numbers by each common factor
if (all_round_factor == true) {
for (int j = 0; j < set_of_numbers.length; j++) {
set_of_numbers[j] /= index;
}
common_factors.add(index);
return findHCFFactors();
}
index++;
}
return 0;
}
/**
* Just calls out and collects the prepared factors.
* @return - string value
*/
public int getHCF() {
findHCFFactors();
//iterate through and retrieve members
calc_result = 1;
common_factors.stream().forEach((factor) -> {
calc_result *= factor;
});
return calc_result;
}
}Main Class:
package arithmetic;
import java.util.ArrayList;
import java.util.List;
public class Arithmetic {
public static void main(String[] args) {
System.out.println("Welcome to our demonstration sequels");
System.out.println("Hope you enjoy (and follow) the lessons.");
System.out.println("");
/*
* Find HCF.
*/
String render_result = "The HCF of ";
HCF hcf;
List<Integer> set;
set = new ArrayList<>();
set.add(30);
set.add(48);
set.add(54);
for (int number : set) {
render_result += number + "; ";
}
render_result += "is: ";
hcf = new HCF(set);
System.out.println(render_result + hcf.getHCF());
}
}Try it out!
Elegance (0.0)
