Abstract Class In Java

Interface In Java

Collection Framework In Java

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Generics In Java

Exception handling

Multithreading In Java

Lambda Expression

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Abstract Class In Java

In Java, an abstract class is a special class that cannot be used to create objects directly. Instead, it provides a template or example for copying other classes.

Interface In Java

In Java, an interface is a reference type that defines a set of summary methods. It serves as a contract or blueprint for the class to follow.

Collection Framework In Java

Generics In Java

Exception handling

An exception in Java is an occurrence that modifies the usual course of a program's execution.

Multithreading In Java

The multithreading functionality of Java enables the concurrent execution of several threads. A thread, a tiny sub-process, is the smallest processing unit.

Lambda Expression

The new and significant lambda expression feature of Java was added in Java SE 8.