Features

Simple

• It is easy to learn
• It is based on c and C++.
• It removes all complicated features of c and c++ such as pointers, operator overloading, multiple inheritance, dynamic linking...etc.

Object Oriented

• Java is Object Oriented Language.
• It provides us programming environment where we can create objects and can perform operations on them.

Robust

• It uses strong memory management.
• There is a lack of pointers that avoids security problems.
• Java provides automatic garbage collection which runs on the Java Virtual Machine to get rid of objects which are not being used by a Java application anymore.
• There are exception handling and the type checking mechanism in Java. All these points make Java robust.

Secured

• Java's security model protect users from hostile programs downloaded from some untrusted resource within a network through “sandbox”.
• It allows all the Java programs to run inside the sandbox only and prevents many activities from untrusted resources such as reading or writing to the local disk, accessing network.

Dynamic

• Dynamic Polymorphism
• Compiler doesn’t understand which method to call in advance.
• JVM decide which method to call at run time.
• Dynamic memory allocation
• All Java objects are dynamically allocated.

Distributed

• Java is a distributed language which means that the program can be design to run on computer networks.
• To design such applications Java provides an extensive library of classes for communication and technology such as RMI. .

Multithreading

• Multithreading is a Java feature that allows concurrent execution of two or more parts of a program for maximum utilization of CPU.
• Each part of such program is called a thread.
• Now a day’s most GUI applications are multithreaded applications.

Platform Dependent Languages

• Java is platform independent because it is different from other languages like C, C++, etc. which are compiled into platform specific machines while Java is a write once, run anywhere language. A platform is the hardware or software environment in which a program runs.
• There are two types of platforms software-based and hardware-based. Java provides a software-based platform.
• The Java platform differs from most other platforms in the sense that it is a software-based platform that runs on top of other hardware-based platforms. It has two components:
• Runtime Environment
• API(Application Programming Interface)
• Java code can be executed on multiple platforms, for example, Windows, Linux, Sun Solaris, Mac/OS, etc. Java code is compiled by the compiler and converted into bytecode. This bytecode is a platform-independent code because it can be run on multiple platforms, i.e., Write Once and Run Anywhere (WORA).

Internet Programming

• Platform Independent
• Support to Internet Protocols
• Provides libraries for network programming.
• So java is most suitable for Internet Programming.