In Programming languages like C++ the memory management is handled by the user like deleting objects once the object is no more useful is the programmers responsibility. Whereas in java its automatically done ie Garbage collection.
Also java has eliminated pointers which can create a lot of unwanted and confusing memory references resulting in memory waste.

First of all Java is Object Oriented Programing Language and Java supports
for Internet and Networking-based Applications its is more secured then the
other languages like C C++. Another reason is byte code is executed under JAVA
Runtime Environment. which has several Security related checking . It is
understandable by JVM only. Regarding this very difficult to Trap the Internet
and Network based Applications by the Hackers This is one of the reasons for
using Java

konnipati.sivakumar

Before talking about secure let us compare the difference between C and Java.

First a C program is coverted as shown below

C(sourcecode) --> compiler---> compiles to binary (101010)---> OperatingSystem--->executes the program

As we can see the Operating system directly interacts with the binary file generatd by C compiler. If this binary file (which is .exe file) is infected with virus it will definetly effect Operating system

Now let us see in Java

java(source code) --> compiler---> compile to bytecode(.class file)--->JVM --->converts/executes to binary(001010)--->Operatingsystem--->executes

The Byte code goes through JVM and only JVM can convert byte code to machine readable form that is binary. The virus cannot go inside JVM and manipulate the binary. Immediately after the binary file is generated it is executed by Operating system and hence it is 100 secure