Question

write a java code, and add methods to

-Compute the average age of all female students.

-Compute the least amount of credits completed among males.

Store the three arrays in the demo file.

Print the results within the demo file.

String []gender ={"F", "F", "M", "F", "F", "M", "M", "M", "M", "F", "M", "F", "M", "F", "F", "M", "M", "F", "M", "F"};

int []age = {18, 19, 19, 21, 20, 18, 24, 19, 21, 21, 21, 23, 20, 20, 19, 18, 19, 21, 20, 22};

int []credits_completed = {45, 12, 54, 23, 26, 33,18, 16, 28, 34, 36, 33, 49, 58, 51, 40, 38, 48, 56, 10};

Answer 1

Note: - The screenshot of code and output is attached for your refrence .

Demo.java

import java.util.ArrayList;
import java.util.Collections;

public class Demo 
{
        
        //main method 
                public static void main(String[] args) {
                        
                        
                        //array defined for gender , age , credit completed
                        String []gender ={"F", "F", "M", "F", "F", "M", "M", "M", "M", "F", "M", "F", "M", "F", "F", "M", "M", "F", "M", "F"};

                        int []age = {18, 19, 19, 21, 20, 18, 24, 19, 21, 21, 21, 23, 20, 20, 19, 18, 19, 21, 20, 22};

                        int []credits_completed = {45, 12, 54, 23, 26, 33,18, 16, 28, 34, 36, 33, 49, 58, 51, 40, 38, 48, 56, 10};
                        
                        
                        
                        //list to store  male credit completed and age of females 
                ArrayList<Integer> male = new ArrayList<Integer>(); 
                ArrayList<Integer> female = new ArrayList<Integer>(); 

                        
                        for(int i=0 ; i < gender.length ; i++)
                        {
                                if(gender[i].equals("F"))
                                {
                                        female.add(age[i]);
                                }
                                else
                                {
                                        male.add(credits_completed[i]);

                                }
                        }
                        Collections.sort(male);
                        Collections.sort(female);
                        
                                System.out.println("Average age of all female students -- "+averageAgeFemale(female));
                                System.out.println("Least amount of credits completed among males -- "+leastCreditByMale(male));
                        
                }
                
                
                
                
                //method to calculate least amount of credits completed among males.
                private static int leastCreditByMale(ArrayList<Integer> male) {
                        
                        return male.get(0);
                }

                
                
                
                //Method to Calculate average age of all female students.
                private static float averageAgeFemale(ArrayList<Integer> female) {
                                
                        float sum =0;
                        for (Integer integer : female) 
                        {
                                sum = sum + integer;
                        }
                        return sum/female.size();
                        
                }
}

Demo.java -

Output-