The Java Language the referencing and dereferencing of objects is handled for you automatically. Java does not allow you to manipulate pointers or memory addresses of any kind. It does not allow you to cast object or array references into integers and It does not allow you to do pointer arithmetic. It does not allow you to compute the size in bytes of any primitive type or object. There are two reasons for these restrictions:

Pointers are a notorious source of bugs. Eliminating them simplifies the language and eliminates many potential bugs. Pointers and pointer arithmetic could be used to sidestep Java's run-time checks and security mechanisms. Removing pointers allows Java to provide the security guarantees that it does.

To a C programmer, the lack of pointers and pointer arithmetic may seem an odious restriction in Java. But once you get used to the Java object-oriented programming model, it no longer seems like a serious restriction at all. The lack of pointers does mean that you probably can't do things like write UNIX device drivers in Java (at least not without using native methods written in C). But big deal--most of us never have to do this kind of low-level programming anyway.

Pointers are a notorious source of bugs. Eliminating them simplifies the language and eliminates many bugs. Removing pointers allows Java to provide the security guarantees that it does.

Pointers are not used in java,why because java is a platform independent language and also it is a one type of internet based language.

1.To avoid confusion for the programmer.
2.Security purpose

Pointers is eliminated in java because pointers concept are complecated for the programmer.pointers are not secure,it generates virus.

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