Variables Of Java Class part-2

In the previous post, talked about how many elements of a java class & local variable. Now we learn about Instance variable.

2. Instance Variable

• Declaration:- The variables which are declared inside the class but outside of the method that are called instance variable.

• Scope:- The variable can access inside the class. All methods, constructors and blocks of the class also able to access the variables.

• Memory Allocation:- Memory is allocated in object creation time. Memory released when object is destroyed.

• Stored Memory:- Heap is a memory  place where the objects, and its instance variable are stored.

3. Static Variable

• Declaration:- The variables which are declared inside the class and outside of the method with static modifier are called static variable.

• Memory Allocation:- When .class file is loaded the memory allocated.

• Scope:- The static variable can access within the class. Access by class name.

• Stored Area:- The variable stored in non-heap memory.
  To set up java environment visit here.

Next post is coming soon.......

Read More

Variables Of Java Class part-1

In the first tutorial, I discussed that, a java class have five elements. Variable is one of these. Now we discuss about variable. There are three types of variables. They are..

1. Local Variable

• Declaration:- Declared inside the method or constructor or blocks.

• Scope:- We can access the local variable only within the method, within the constructor or within the block. Out side is not possible.

• Memory allocation:- When method or constructor of blocks start memory are allocated. When method invoked memory allocated and memory released when method completed.

• Stored Area:- Local variable are stored in stack memory

        Next post is coming soon.......

Read More