In Java, all classes (built-in or user-defined) are (implicitly) subclasses of Object . Using an array of Object in the List class allows any kind of Object (an instance of any class) to be stored in the list. However, primitive types (int, char, etc) cannot be stored in the list.
Read moreWhat is built in packages in Java?
Packages in java are used to avoid naming conflict and to control the access of class, interface, sub-classes, etc . A package can be defined as a group of similar types of classes, sub-classes, interfaces or enumerations, etc.
Read moreWhat are built in methods in Java?
In Java, predefined methods are the method that is already defined in the Java class libraries is known as predefined methods. It is also known as the standard library method or built-in method. We can directly use these methods just by calling them in the program at any point.
Read moreHow many built in classes are there in Java?
There are 5,000 or so classes built-in to Java, and programmers have written hundreds of thousands if not millions of their own.
Read moreWhat are inbuilt classes?
What are inbuilt classes? Explanation: The classes that are already provided in a programming language for use are inbuilt classes. These classes provide some functions or objects that can be used by the programmer for easier code. Explanation: The inbuilt classes must be included in the program.
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