The Java Generics features were added to the Java language from Java 5.
Generic in Java is added to provide compile time type-safety of code and removing risk of ClassCastException at runtime which was quite frequent error in Java code, for those who doesn’t know what is type-safety at compile time, it’s just a check by compiler that correct Type is used in correct place and there should not be any ClassCastException.
There are mainly 3 advantages of generics. They are as follows:
1) Type-safety : We can hold only a single type of objects in generics. It doesn’t allow to store other objects.
2) Type casting is not required: There is no need to typecast the object.
3) Compile-Time Checking: It is checked at compile time so problem will not occur at runtime. The good programming strategy says it is far better to handle the problem at compile time than runtime.
Generic in Java is added to provide compile time type-safety of code and removing risk of ClassCastException at runtime which was quite frequent error in Java code, for those who doesn’t know what is type-safety at compile time, it’s just a check by compiler that correct Type is used in correct place and there should not be any ClassCastException.
There are mainly 3 advantages of generics. They are as follows:
1) Type-safety : We can hold only a single type of objects in generics. It doesn’t allow to store other objects.
2) Type casting is not required: There is no need to typecast the object.
3) Compile-Time Checking: It is checked at compile time so problem will not occur at runtime. The good programming strategy says it is far better to handle the problem at compile time than runtime.
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