Java Secured

Secured 

•         Program run inside java virtual machine
•         There is No Explicit pointer
•         We can't able to change byte code

• Classloader- adds security by separating the package for the classes of the local file system from those that are imported from network sources.
• Bytecode Verifier- checks the code fragments for illegal code that can violate access right to objects.
• Security Manager- determines what resources a class can access such as reading and writing to the local disk.

Robust

• Robust simply means strong. Java uses strong memory management. There are lack of pointers that avoids security problem. 
• There is automatic garbage collection in java. 
• There is exception handling and type checking mechanism in java. All these points makes java robust.

Portable

•         Using byte code you can run any platform. 

High Performance 

•     Java is fast performance language compare with any language like C,C++

Distributed 

•  We can able to create distributed application in java by using EJB and RMI . We may access file calling  method from any machine on internet

Multi-Threaded 

•   Thread is executed separate program.multi thread can use to execute multiple process and execute concurrently. 
• Thread to share same memory  and execute different process. Thread is important for multi-media and web application.
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