How to invoke a method on object creation?-CodePudding

I have the following POJO class:

public class Charity {

    private List<Donation> donations;

    private Double totalDonationAmount;

    // constructor setters etc...

    public void setTotalRaised() {

        Double totalRaised= 0.0;

        for (Donation donation: donations) {
            totalRaised = donation.getPrice();
        }
        totalDonationAmount= totalRaised;
    }

}

I can call my setTotalRaised() method in order to set the total and it works as expected. However, I want this to be calculated when the Charity object is first created.

What is the best way to do so? I know I can call the method in the constructor, but is there a better way?

CodePudding user response：

Normally, calling the method inside constructor is the only way. But, there is one other way. Don't call the method at all. In fact don't even create the field. Just create a getter method which returns total donations.

import java.util.List;

public class Charity {

    private List<Donation> donations;
    public double getTotalRaised() {
        Double totalRaised= 0.0;
        for (Donation donation: donations) {
            totalRaised = donation.getPrice();
        }
        return totalRaised;
    }

}

This is not much but it does what you need.