differences between java and c++ #4

Java does not support typedefs, defines, or a preprocessor. Without a preprocessor, there are no provisions for including header files.

Since Java does not have a preprocessor there is no concept of #define macros or manifest constants. However, the declaration of named constants is supported in Java through use of the final keyword.

Java does not support enums but, as mentioned above, does support named constants.

Java supports classes, but does not support structures or unions.

Java does not support pointers (at least it does not allow you to modify the address contained in a pointer or to perform pointer arithmetic). Much of the need for pointers was eliminated by providing types for arrays and strings.

The interface keyword in Java is used to create the equivalence of an abstract base class containing only method declarations and constants. No variable data members or method definitions are allowed. (True abstract base classes can also be created in Java.) The interface concept is not supported by C++.
Java does not support multiple inheritance. To some extent, the interface feature provides the desirable features of multiple inheritance to a Java program without some of the underlying problems.
Java does not support the goto statement (but goto is a reserved word). However, it does support labeled break and continue statements, a feature not supported by C++. In certain restricted situations, labeled break and continue statements can be used where a goto statement might otherwise be used.
Java does not support operator overloading.
Java does not support automatic type conversions (except where guaranteed safe).
Unlike C++, Java has a String type, and objects of this type are immutable (cannot be modified). Quoted strings are automatically converted into String objects. Java also has a StringBuffer type. Objects of this type can be modified, and a variety of string manipulation methods are provided.

The scope resolution operator (::) required in C++ is not used in Java. The dot is used to construct all fully-qualified references. Also, since there are no pointers, the pointer operator (->) used in C++ is not required in Java.

1.it support the basic oops concept
2.java Does't support structure and union,where as c++ supports it.
3.goto statement is avoided in java but not in c++.
4.pointers are not available in java but present in c++.
5.java Does't support multiple inheritance.it supports multilevel inheritance.but c++ supports it
6.operator overloading is avoided.but c++ support operator overloading
7.java is an automatic garbage collector where as in c++ destructor is use to frees memory.
8.java works only on reference where as c++ works on reference as well as on value