A example decorator design pattern

Decorator.java

public class Test {

    public static void main(String[] args) {
        JavaTeamLead javaTeamLead = new JavaTeamLead
                (new SeniorJavaDeveloper(
                        new JavaDeveloper()));
        System.out.println(javaTeamLead.makeJob());
        /* Write Java code. Make code review. Send emails to clients. */
        
    }
}

/* Developer interface */
interface Developer {
    public String makeJob();
}

/* Concrete Developer */
class JavaDeveloper implements Developer {
    @Override
    public String makeJob() {
        return "Write Java code.";
    }
}

/* Developer Decorator to add functionality */
class DeveloperDecorator implements Developer {
    private Developer developer;

    public DeveloperDecorator(Developer developer) {
        this.developer = developer;
    }

    @Override
    public String makeJob() {
        return developer.makeJob();
    }
}

/* Concrete decorator, senior java dev */
class SeniorJavaDeveloper extends DeveloperDecorator {

    public SeniorJavaDeveloper(Developer developer) {
        super(developer);
    }

    public String makeCodeReview() {
        return "Make code review.";
    }

    public String makeJob() {
        return super.makeJob() + " " + makeCodeReview();
    }
}

class JavaTeamLead extends DeveloperDecorator {

    public JavaTeamLead(Developer developer) {
        super(developer);
    }

    public String clientReview() {
        return "Send emails to clients.";
    }

    public String makeJob() {
        return super.makeJob() + " " + clientReview();
    }

}