Take your coffe and let's enjoy Java!

Here some exercises during my Practice learning Java and Oriented Object Programming

• Learned how to manage Objects;
• Learned how to manage Setters, Getters and Constructors;
• Learned how to set up a package in this Programming Language;
• Inheritance and Polimorphism;
• Conclusion: It isn't as difficult as people say if you learned other Programming languages;

Some Knowledge:

• All classes or at least one class is son of Object -> For example in my NaloFlix exercise the Object Titulo doesn't extend anything even 'cause that is the Mother of all classes, even though it extends Object behind the scenes.

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• Why when printing a object it shows the object@somenumbers ? This happens because sout converts the object into a String and the String gets the object and uses this code:

getClass().getName() + '@' + Integer.toHexString(hashCode())

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• You cannot inherit the constructor

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• You can have two variables that work as a reference to one object

Movie movie = new Movie();
Movie lordOfTheRings = movie;
// references but the same object, this is just a form of expressing the same thing

• Sometimes you will face the misterious problem of CompareTo -> In my NaloFlix exercise when having to order a List I had problems because the Collection.sort() could not order Object because it uses the compareTo() behind the scenes so I went in my SuperClass Titulo and made a @override and made when comparing the objects, get name from them and comparing these Strings.

@Override
    public int compareTo(Titulo anotherTitle) {
        return this.getName().compareTo(anotherTitle.getName());
    }