Important one liners....

Object An entity having specific characteristics(variables) and behavior(Methods)                                                                                        

Abstraction Hiding unnecessary details and presenting the required ones.

Encapsulation Binding and wrapping up of methods and data members.

Class Representation for a set of objects having common behaviour and characteristics.

Byte code The java byte code is a machine language instruction set. The byte code is independent of the computer system it has to run upon.

Native Executable Code A machine code program which can run on a specific platform
(hardware/ software) only.

JVM Set of Java programs (interpreter compiler etc.) which converts source code to byte code and is also responsible for executing the program. (JRE)

Applet Internet Applets are small programs that are embedded in web pages and are run on the viewers’ machine (which are meant to run on the internet browser)

Stand Alone Applications – Meant to run on an independent machine.

Inheritance When a class acquires properties of another class (may add a few of its own).

Polymorphism Behaving differently under different situations. Having one name but many different shapes.

Object Code A machine language conversion of the source code. 2 types – Applet, Stand alone applications.

Recursion When a function calls itself
 public void abc()
 {
 abc();
 }

WORA Write Once, Run Anywhere (+ do a few more properties)

IDE Integrated development Environment (E.g. Blue J) – where we can type, edit, debug, run, organize etc. java programs.

Compiler Which converts the all the source code to machine code before execution. (whole program)

Interpreter Which converts and executes source code line by line.

API Applications Programming Interface (Java Libraries) (inbuilt feature/packages)

JRE Java Runtime Environment – What JVM creates to run a Java program.

Type Casting Writing a data type in () before a value, variable or an
expression to change its type temporarily.
Sop((char)65)
Used in explicit type conversion