Description

Java is a programming language created byJames Gosling from Sun Microsystems (Sun) in 1991. The target ofJava is to write a program once and then run this program onmultiple operating systems.
Over time new enhanced versions of Java have been released. Thecurrent version of Java is Java 1.8 which is also known as Java8.
The Java language was designed with the following properties:
• Platform independent: Java programs use the Java virtual machineas abstraction and do not access the operating system directly.This makes Java programs highly portable. A Java program (which isstandard-compliant and follows certain rules) can run unmodified onall supported platforms, e.g., Windows or Linux.
• Object-orientated programming language: Except the primitive datatypes, all elements in Java are objects.
• Strongly-typed programming language: Java is strongly-typed,e.g., the types of the used variables must be pre-defined andconversion to other objects is relatively strict, e.g., must bedone in most cases by the programmer.
• Interpreted and compiled language: Java source code istransferred into the bytecode format which does not depend on thetarget platform. These bytecode instructions will be interpreted bythe Java Virtual machine (JVM). The JVM contains a so calledHotspot-Compiler which translates performance critical bytecodeinstructions into native code instructions.
• Automatic memory management: Java manages the memory allocationand de-allocation for creating new objects. The program does nothave direct access to the memory. The so-called garbage collectorautomatically deletes objects to which no active pointerexists.
This app introduces the basic part of java. Hope it help!