Java

Beschreibung

Java Mindmap am Java, erstellt von info3027 am 27/10/2013.
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Zusammenfassung der Ressource

Java
  1. Constructor

    Anmerkungen:

    • Aufgabe: Create an instance of a class
    1. Return Types
      1. None! Note even "Void"
    2. Methods

      Anmerkungen:

      • Aufgabe: execute Java Code
      1. Return Types
        1. Any and none (void)
      2. Object

        Anmerkungen:

        • The term ‘object’, however, refers to an actual instance of a class. Every object must belong to a class. Objects are created and eventually destroyed – so they only live in the program for a limited time. While objects are ‘living’ their properties may also be changed signficantly. An example will help clarify what we’ve said. Suppose we have a class called ‘Animal’. All Animals have bodies and brains. So, this general ‘template’ of an Animal does not change. An instance of the Animal class would be a specific animal – like a lion, a cat, or a zebra. These instances of the Animal class would be called objects. Whereas the Animal class is a general concept, the instances of that class – the lions, cats, etc – take that general concept and create a real instance of it.
        1. Class

          Anmerkungen:

          • The term ‘class’ refers to the actual written piece of code in which the class is defined. A class is a static piece of code that consists of attributes which don’t change during the execution of a program – like the method definitions within a class.
          1. API (Application programming interface)

            Anmerkungen:

            • An application programming interface (API) specifies how some software components should interact with each other.

            Anlagen:

            1. Implementation

              Anmerkungen:

              • Objekte werden implementiert
            2. instance Variables
              1. private String name
                1. In this case you are neither adding the name to a list, nor are you assigning a particular value to the string. All you are doing is declaring the name of the String object variable.
              2. Local Variables
                1. "Verschwinden, wenn Methode abgeschlossen" (Kurzzeitgedächtnis)
                Zusammenfassung anzeigen Zusammenfassung ausblenden

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