Java provides a lot of emphasis on security. 
Through java programming languages we can make an application or system which will be virus-free and tamper-free systems.

From the beginning, Java was designed to make certain kinds of attacks impossible, among them. Java community had be mainly focused on:..

Overrunning the runtime stack( To prevent a common attack of worms and viruses)



Corrupting memory outside its own process space

Reading or writing files without permission



Java technology lets you construct applications that can't be invaded from outside.
 
In the network environment, applications written in the Java programming language are secure from intrusion by unauthorized code attempting to get behind the scenes and create viruses or invade file systems.

So we can say Java is secure programming language .