Java Basic Go Back Object reference variable views 12:03 These are created as per the needs of the programmer. These variables are used to refer to an object and that is why they are called reference variables. They are declared to be of a specific type. It is use to access objects in a class. Objects are the instances of the classes created in the Java program or predefined classes of the program. Datatypes and Variables Types of Variables Defining the structure of java class Syntax to import package Working with Java Data types Object reference variable String builder class and contructor Methods of string builder class Using Operators and Decision Constructors Using Increment and Decrement Operators Using Right shift operators Using Parenthesis to override operator precendence