Java - What is it?

[bugme]

Hello everyone,


After much insistence, there is now a Java class. Java is (in my opinion) a very nice language and you can have lots of it. You can use with it with making games, apps and Android apps / games. It is convenient that the natural cross-platform and can be. Therefore used both on Mac, Windows and Linux.

Java is object-oriented language and the family of C languages. Object-oriented means that you work a lot with objects and assign certain synax. You leave so objects process certain data. A simple example is that for example a TextView (an object in XML) assign a specific text. In Java (android) would be just about this:

[COLOR=#000000](TextView) tvexample1 = (TextView) findViewById(R.id.tvexample1);
[/COLOR]

Sets the variable.

[COLOR=#000000]tvexample1.setText("Hello RageZONE"); 
[/COLOR]

Sets the text of the textview.

In the first line I tell with (TextView) that the object I define a 'TextView is (Android syntax) then I give the variable a name tvexample, then I define again that it is a TextView and I look with a certain method where tvexample1 in the layout state. Then I give the variable a function (setText).

This is quite confusing for most of you but this was just to show what is meant by object-oriented (tutorials to follow). As you've already seen, knowledge of the C language is really a requirement to learn this.

I am very motivated and wanted you to quickly learn what fun things. If you do not understand the above code, do not worry I'll explain everything from the beginning once I start my other tutorials.

So please give as much feedback & Suggestions possible. I can use your suggestions and Feedback for the future of making tutorials and therefore i really need them!

Don't forget to make my reputation as green as possible and like the post if I've really helped you.

 

[Jash]

In the first line I tell with (TextView) that the object I define a 'TextView is (Android syntax) then I give the variable a name tvexample, then I define again that it is a TextView and I look with a certain method where tvexample1 in the layout state. Then I give the variable a function (setText).

No offence... but C (and I mean solely C alone, excluding C++, C#) programmers will be very confused trying to understand this paragraph, 'cause of the many questions left unanswered:

1) Is "(TextView)tvexample1" a declaration or just an assignment?
2) Is "(TextView) findViewById(R.id.tvexample1)" object casting or pointer casting?
3) Is "R.id.tvexample1" passed by reference or value into "findViewById"?
4) Is "TextView" a struct or a class?
5) Wtf is a class anyway? (Supposedly a joke, since C doesn't have classes)
6) Are you sure the "setText" function would only have to accept string arguments? (Supposedly another joke, since C doesn't have function overloading).

Jokes aside, C is still a wonderful language, but the point is that although the C languages (including C++ and C#) and Java are very, very similar syntax-wise, Java's concept of "object-oriented" is very unique and should not be confused as that of the C languages. One example which is the ability to override methods to objects upon instantiation. Consider the following:

MyClass c1 = new MyClass(){
    @Override
    public void Cry(){
        System.out.printLln("Lol1");
    }
}
MyClass c2 = new MyClass(){
    @Override
    public void Cry(){
        System.out.printLln("Lol2");
    }
}
c1.Cry(); // Outputs "Lol1"
c2.Cry(); // Outputs "Lol2"

As you can see, the above code, though valid and very useful in Java, isn't gonna work for the C languages, because their ideas of Encapsulation are rather different.

So after beating around all this bush, the point is, i hope you would give the viewers a very, very thorough introduction to Java while keeping in mind the fact that they come from a C background, and pinpoint the mistakes they might have as a result.

BTW I don't think think an "Android syntax" exists, it should be code written in "Java syntax" and targeting the Android library.