The document outlines the key features and characteristics of the Java programming language, highlighting its compiled and interpreted nature, portability, object-oriented principles, robustness, and security. It notes that Java is designed for high performance, supports multithreading, and is both simple and familiar to users, while being dynamic and extensible through object-oriented concepts like inheritance. Overall, Java is promoted as a versatile and secure language suitable for distributed systems and internet applications.

1. Compiled and Interpreted
Platform-Independent and Portable
Object-Oriented
Robust and Secure
Distributed
Familiar ,Simple and Small
Multithreaded and interactive
High Performance
Dynamic and Extensible

2. Compiled and Interpreted :
While running java program, it gets converted into bytecode and then it
runs. Conversion of java to byte-code is carried out by compiler called as
javac compiler. Target bytecodes are interpreted using interpreter called
as JVM (Java Virtual Machine). So Java is both interpreted and compiled
language.
Source Code
.java file
Class file Execution
Compiled Interpreted

3. Platform-
Independent
and Portable
Source File(Hello.java)
Javac(Compiler)
Class File(Bytecodes)
At Runtime(JVM)
Windows-Linux-Mac

4. Object-Oriented
•Java provides various features like encapsulation,
polymorphism, classes and abstract data types for which
we call it object oriented language. Although it is not
purely object oriented, because a purely object oriented
language treats everything inside program as objects. But
Java also supports primitive data types like int, byte and
long etc . which are not objects.

5. Robust and Secure
• Java is Robust because it is highly supported language. It is portable
across many operating systems. Due to this feature it is also known
as “ Platform Independent” or “Write Once Run Anywhere”
language.
• The main reason behind the java's security are ......
1) no readability i.e., contains byte code understandable to only
JVM
2) no virus will infect the byte code. Even if the virus entered into
byte code the jvm doesn't understand it, so jvm keeps these
instructions as it is. No executable code will be generated to this
virus.

6. Distributed:
Java is Distributed Language Means because the program of
java is compiled onto one machine can be easily transferred to
machine and Executes them on another machine because
facility of Bytes Codes So java is Specially designed For
Internet Users which uses the Remote Computers For
Executing their Programs on local machine after transferring
the Programs from Remote Computers or either from the
internet

7. Familiar ,Simple and Small
• java is a simple Language Because it contains many features
of other Languages like c and C++ and Java Removes
Complexity because it doesn’t use pointers, Storage Classes
and Go to Statements and java Doesn’t support Multiple
Inheritance

8. Multithreaded and Interactive:
Java uses Multithreaded Techniques For Execution Means Like
in other in Structure Languages Code is Divided into the Small
Parts Like These Code of java is divided into the Smaller parts
those are Executed by java in Sequence and Timing Manner
this is Called as Multithreaded In this Program of java is
divided into the Small parts those are Executed by Compiler of
java itself Java is Called as Interactive because Code of java
Supports Also CUI and Also GUI Programs

9. High performance:
• Java programs are complied to portable intermediate
form know as bytecodes, rather than to native
machine level instructions and JVM executes Java
bytecode on. Any machine on which it is installed. This
architecture means that Java programs are faster than
program or scripts written in purely interpreted
languages but slower than C and C++ programs that
compiled to native machine languages

10. Dynamic and Extensible Code:-
• Java has Dynamic and Extensible Code Means With the Help
of OOPS java Provides Inheritance and With the Help of
Inheritance we Reuse the Code that is Pre-defined and Also
uses all the built in Functions of java and Classes