将数组从一个 class 发送到另一个并排序

Question

I need some help. So, recently I started working on a bit more complex stuff in Java and I got a task to make a program which will sort people and the amount of money they have in a descending order from the biggest amount of money to the smallest, but the array with the people's names is in one class, the amount of money is in another class and I have to send them to a third class and then sort them. I tried to make it work and even asked my teacher but even the code he wrote for this doesn't work. This is what I have so far.

package classes;

public class Class {

    public static void main(String[] args) {

        String[]Name = {"Frodo","Princess Leia","Sansa Stark","Harry Potter","Spiderman"};
            Class3 send = new Class3();
            send.doesntmatter(Name);

    }
}

Second class with money.

package classes;

class Class2 {

    public static void main (String[]args) {

        int[]Money = {3000,400000,50000,100000,25};
            Class3 send = new Class3();
            send.doesntmatter(Money);
    }
}

And the third class where it all gets sorted.

package classes;

class Class3 {

    public void doesntmatter(String[]Name,int[]Money) {

        for(int first = 0; first < 4; first++){

            int most = first;

            for(int current = first + 1; current < 4; current++){
                if (Money[current] > Money[most]){
                    most = current;
                }

                int temp = Money[most];
                Money[most] = Money[first];
                Money[first] = temp;

                String tempString = Name[most];
                Name[most] = Name[first];
                Name[first] = tempString;
            }

            for (int i = 0; i < 4; i++){
                System.out.println(Name[i]);
                System.out.println(Money[i]);
        }
    }
    }
}   

I know how to sort them but I have a problem with sending the arrays to an another class. Can somebody please help? I hope you understand what's my problem.

Answer 1

You need to make doesntmatter function to RETURN the array you want:

public int[] doesntmatter(String[]Name,int[]Money) {

    for(int first = 0; first < 4; first++){

        int most = first;

        for(int current = first + 1; current < 4; current++){

            if (Money[current] > Money[most]){
                most = current;
            }

            int temp = Money[most];
            Money[most] = Money[first];
            Money[first] = temp;

            String tempString = Name[most];
            Name[most] = Name[first];
            Name[first] = tempString;
        }

        for (int i = 0; i < 4; i++){
            System.out.println(Name[i]);
            System.out.println(Money[i]);
        }
    }

    return Money;
}

This means that doesntmatter function will make a local copy of Money array, sort it, and return it. Then in Class you need to change this code:

Money = send.doesntMatter(Money);

This last line will call doesntMatter with the unsorted array. The function will create a local copy, sort that local copy, return in, and then that local copy the function returns will be assigned to Money variable.