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C++ Vs Java

Posted by admin on 5/10/10 • Categorized as Software,Uncategorized

The strangest of all languages for a normal person (non-programmer) is to see codes called languages in computer jargon. C++ and Java are two popular examples of a computer language that are coded painstakingly by programmers in order to create applications, processes, websites, etc. For the sake of comparison, may this article “reduce” the “language” into layman’s terms.

Definition wise, C++ and Java programming languages differ in design goals. C++ is intended for systems programming, extending the C language programming. While Java is intended for network computing.

So how come people still insist in comparing the two when in the first place they were made to be different?

C++

Java
Syntax
  1. Parsing is more complicated
  1. Parsing can be done by simple LALR as it has context-free grammar
  1. Allows namespace level constants, variables and functions
  1. All its declarations must be inside an interface
  1. A class name declares an objet of that class as value
  1. Objects are not values, instead it declares class name as reference to an object of that class
  1. The operator “.” takes an object as the left operand and accesses a member of the object.
  1. This operator does not work
  1. “goto” statements are supported
  1. Structured control flow is enforced; depends on “labelled beak” and “labelled continue” statement resembling  “goto” function.
  1. With Low-level features.
  1. none

Apparently, when you get a little bit closer to these programs, you could see similarities of its structures. C++ and Java have similar syntax because the latter was derived from the former. The following are some of the syntax differences of C++ and Java:

Apparently, C++ and Java have a hundred differences to speak of. Aside from Syntax, here are five important features that make Java distinct from C++ as follows:

1. Speed – Java runs 20 times slower than C. Somehow it is aided by compilers which may be appearing at this writing which offer significant speed-ups.

2. Everything must be in class for Java. There is no such thing as global functions or global data; no structs or enumerations or unions. To have its equivalent, static methods and static data within a class must be made.

3. Designers of Java do not have multiple inheritances as in C++, but replaced it with simple conformance to interfaces. This structure called “interface” is almost identical to a C++ class that has nothing but pure virtual functions.

4. The form of class definitions of Java and C++ are similar, however, there is no closing semicolon for the former.

5. Java has no scope resolution operator. Java uses the dot for everything since it can define elements only within the class.

Although C++ and Java have different design goals to begin with, comparing them becomes unavoidable especially for computer programmers especially software engineers because they are forced to shift from one language to another to perform certain tasks in website creation and software development.

Tomy is guest blogger and recommends SelfTestEngine as Exams Preparation Tool for Exams like 642-642 and 70-236.

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