Builder kincolle’s blogs

The Builder is a design pattern designed to provide a flexible solution to various object creation problems in object-oriented programming. The intent of the Builder design pattern is to separate the construction of a complex object from its representation. It is one of the Gang of Four design patterns.

Here is the java code example:

interface Sender

public interface Sender {
    public void send();
}

class MailSender

public class MailSender implements Sender {
    @Override
    public void send(){
        System.out.println("This is Mailsender");
    }
}

class SmsSender

public class SmsSender implements Sender {
    @Override
    public void send(){
        System.out.println("This is SmssSender");
    }
}

class Builder

public class Builder {
    private List<Sender> list = new ArrayList<>();

    public void produceMailSender(int number) {
        for(int i=0;i<number;i++){
            list.add(new MailSender());
        }
    }

    public void produceSmsSender(int number) {
        for(int i=0;i<number;i++){
            list.add(new SmsSender());
        }
    }
}

Then do the test

public class BuilderTest {
    public static void main(String[] args) {
        Builder builder = new Builder();
        builder.produceMailSender(5);
        builder.produceMailSender(5);
    }
}