In Java, the scope of a variable refers to the portion of the program where the variable can be accessed or used. There are different types of variable scope in Java, including:
Local scope: A variable declared within a method or block has local scope, meaning it can only be accessed within that method or block.
Instance scope: A variable declared within a class but outside of any method or block has instance scope, meaning it can be accessed by any method of the class.
Class scope: A variable declared as static within a class has class scope, meaning it can be accessed by any method of the class or any object of the class, regardless of the object's state.
Block scope:A variable declared within a block (such as a for loop or an if statement) has block scope, meaning it can be accessed within the block in which it is declared and also any nested block inside that block.
The scope of a variable in the Java language defines the area of the code where the variable is accessible. So, there are mainly three types of scopes: local, instance, and class. Local variables are defined inside methods, constructors, or blocks and exist only within the structures. Instance variables belong to an object and are accessible as long as the object exists. Class variables declared with the keyword static are common to all the instances and can be accessed with the class name.