A Java abstract class is a class that can't be instantiated. That means you cannot create new instances of an abstract class. It works as a base for subclasses. You should learn about Java Inheritance ...

The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from ...

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also known as ...

Here's a quick look at the three types of class loaders and everything you need to know to work with them in your Java programs. Java class loaders are a component of the Java virtual machine (JVM) ...