Java Programming For Kids

Source: www.smartdataprocessing.com
Topic: Java Programming

Short Desciption:
Chapter 3. Pet and Fish - Java Classes J ava programs consist of classes that represent objects from the real world. Even though people may have different preferences as to how to write programs, most ...

 

Content Inside:
Chapter 3. Pet and Fish - Java Classes J ava programs consist of classes that represent objects from the real world. Even though people may have different preferences as to how to write programs, most of them agree that its better to do it in a so-called  object-oriented style. This means that good programmers start with deciding  which objects have to be included in the program and which Java classes will represent them. Only after this  part is done, they start writing Java code. Classes and Objects Classes in Java may have methods and attributes . Methods define actions that a class can  perform. Attributes describe the class. Lets create and discuss a class named VideoGame. This class may have several methods, which can tell what  objects of this class can do : start the game, stop it, save the score, and so on. This class also may have some attributes or properties: price, screen  color, number of remote controls and others. In Java language this class may look like this: class VideoGame {  String color;  int price;  void start () {  }  void stop () {  }  void saveScore(String playerName, int score ) {  } } Our class VideoGame  should be similar to other classes that represent video games - all of them have screens of different size and color,  all of them perform similar actions, and all of them cost money. We can be more specific and create another Java class called GameBoyAdvance. It also belongs to the family of video games, but has some properties that are specific to the model GameBoy Advance, for example a cartridge type. class GameBoyAdvance {  String cartridgeType;  int screenWidth;  void startGame() {  }  void stopGame() {  } } In this example the class GameBoyAdvance defines two   attributes - cartridgeType and screenWidth and two methods - startGame() and ...

 

 

 

 

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