Help using a method from another class

[Ben_Dover]

So I've got three class files, each named: Saldo.java, Person.java and SaldoDemo.java

So I've created an Object from the Person class in SaldoDemo, but how do I then use a method called "withdrawal" from Saldo on this Object?

Person.java

package test;

public class Person {

    private String name;
    private Saldo Saldot;
    private Saldo withdraw;
    
    public Person(String initialName, Saldo initialSaldo)
    {
        name = initialName;
        Saldot = initialSaldo;
    }

    public Person(Person original)
    {
        if (original == null)
        {
            System.out.println("Fatal error. 1");
            System.exit(0);
        }

        name = original.name;
    }

    public String toString()
    {
        return (name + " has " + Saldot + " euro.");
    }

    public boolean equals(Person otherPerson, Saldo otherSaldo)
    {
        if (otherPerson == null)
            return false;
        else
            return (name.equals(otherPerson.name));
    }

    public void setName(String newName)
    {
        name = newName;
    }
}

Saldo.java

package test;

public class Saldo {

    private double Saldot = 0;
    private double withdraw;
    private double inSet;

    public Saldo(double Saldot)
    {
        System.out.println("Your Saldo is currently: " + Saldot + " euros.");
    }

    public void set(double newSaldo)
    {
        Saldot = newSaldo;
    }

    public void inSet(double inSet)
    {
        Saldot = Saldot + inSet;
        System.out.println("Registrated. 1");
    }

    public void withdrawal(double withdraw)
    {
        Saldot = Saldot - withdraw;
        System.out.println("Registrated. 2");
    }

    public void setSaldo(double Saldot)
    {
        this.Saldot = 0;
    }

    @Override
    public String toString()
    {
        return ("" + Saldot);
    }

    public void set(Person newName, double newSaldo)
    {
        name = newName;
        Saldot = newSaldo;
    }
}

SaldoDemo.java

package test;
import java.util.Scanner;

public class SaldoDemo {
    public static void main(String[] args) {
        String enterName;
        double enterSaldo, enterWithdraw;

        Scanner scan = new Scanner(System.in);
        System.out.println("Type in your name, please.");
        enterName = scan.nextLine();
        System.out.println("Type in how much money you have on your account.");
        enterSaldo = scan.nextDouble();

        Person Test =
                new Person(enterName,
                    new Saldo(enterSaldo));
        System.out.println("The Person " + enterName + " has " + enterSaldo + " euro on his account.");

        enterWithdraw = scan.nextDouble();

        Test.withdrawal(enterWithdraw); // Problem here.
    }
}

[Fubarable]

You could either give Person a public getSaldo() method, and then call withdrawal on the Saldo object returned, or you could give Person a public withDrawFromSaldo(double amount) and then inside of this method call the private Saldo's withdrawal method. I favor the second solution as it only exposes what is necessary -- it does better at encapsulation.