Java

There are 8 primitive data types Turn back

String class is also a data type. It is immutable.

Scanner class is used to read input.

An array is a reference data type, meaning that it's just an address

Functions declared static don't need the creation of an instance for being accessed or used.

Object is a superclass of everything we create in java

A subclass can be generalized to a superclass. A superclass cannot become a more specific subclass.

If a superclass does not have a default constructor(constructor without parameters), any subclasses extending it must make an explicit call to one of the parameterized constructors of the superclass.

An abstract method is a method declared without an implementation. Abstract methods don't have a body. Abstract classes may have abstract and non-abstract methods.

Classes being written in the same file should not have access modifiers or the code will not execute.