Module 4-Block and static block

01. What is the Non-Static block?
The non-static block will be executed every time an object of the class is created, before the constructor is called as non static block.

02. How to use the non-static block?
-Non-static blocks are not marked by any keyword.
-simply appear as { /* code */ } inside the class.
-Each time an instance (object) of the class is created, the non-static block executes, allowing for instance-level logic.

Example:

public class Example {
{ // Non-static block
System.out.println("Non-static block executed.");
}

public Example() {
    System.out.println("Constructor executed.");
}

}
Output
// Non-static block executed.
// Constructor executed.

Workflow:

*1. Static block: *
-The class is loaded, and static blocks execute (only once per class).
-Static is a class.

-Static blocks are written using static { ... } inside the class body.

2. Non-static block:
An object is created. Non-static blocks execute in sequence.

*3. Constructor: *
-The constructor executes after non-static blocks.

-The constructor name must match the class name.

-It has no return type.

-It is called automatically during object creation.

-It initialises the object's state

4. Instance block:

-It runs automatically whenever an instance (object) of the class is created.

-It executes before the constructor code.

-It is used for code or logic common to all constructors to avoid duplication.

-It cannot accept parameters (unlike constructors).

5. Main method:
Executed after class loading and static block execution.