Java

Nota:

• Aufgabe: Create an instance of a class

1. Return Types
   1. None! Note even "Void"

Nota:

• Aufgabe: execute Java Code

1. Return Types
   1. Any and none (void)

Nota:

• 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.

Nota:

• 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.

Nota:

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

Adjunto:

• Ohne Titel

1. Implementation

   Nota:

   • Objekte werden implementiert

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.

1. "Verschwinden, wenn Methode abgeschlossen" (Kurzzeitgedächtnis)