Variables on Java

A typical program uses various values and these values keep changing while the program is running. For example, you create a program that is used to perform calculations, the values entered by one user will obviously be different from the values entered by another user. This also means that, when creating the program, you cannot know all possible values that will be entered in your program. You should still be able to manage the values that the users will eventually enter in your program.

Object Oriented Programming

Merupakan paradigma pemrograman yang berorientasikan kepada objek. Semua data dan fungsi di dalam paradigma ini dibungkus dalam kelas-kelas atau objek-objek. Bandingkan dengan logika pemrograman terstruktur. Setiap objek dapat menerima pesan, memproses data, dan mengirim pesan ke objek lainnya.
Model data berorientasi objek dikatakan dapat memberi fleksibilitas yang lebih, kemudahan mengubah program, dan digunakan luas dalam teknik piranti lunak skala besar.