In Java, the static keyword is used to define members (variables and methods) that belong to a class itself rather than to instances (objects) of the class. On the other hand, non-static (sometimes called "instance") members belong to individual instances of the class. Here are the key differences between static and non-static members in Java:

1. 1. Ownership:

   • 1.staticbelongs to the class itself, shared by all instances of the class. There is only one copy of a static member in memory, regardless of how many instances of the class exist.
   • 2. Non-static: Belongs to individual instances of the class. Each instance has its own copy of non-static members.

2. 2. Access:

   • 1.static: Can be accessed using the class name (e.g., ClassName.staticMember) or directly without an instance reference.
   • 2. Non-static: Requires an instance of the class to be created before accessing non-static members (e.g., object.nonStaticMember).

3. 3. Memory Allocation:

   • 1. static: Allocated memory once when the class is loaded by the classloader.
   • 2. Non-static: Allocated memory separately for each instance when objects are created.

4. 4. Lifecycle:

   • 1. static: Exists for the entire lifetime of the program or until the class is unloaded.
   • 2. Non-static: Exists as long as the instance to which it belongs exists and is eligible for garbage collection when the instance is no longer referenced.

5. 5. Common Use Cases:

   • 1. static: Used for constants, utility methods, shared resources, and for defining class-level behavior that is not dependent on instance-specific data.
   • 2. Non-static: Used for instance-specific data and behavior that depends on the state of individual objects.

Here's an example illustrating the differences:

In this example, staticVar and staticMethod are shared among all instances of Blog02(i.e My Class), while nonStaticVar and nonStaticMethod are specific to each instance. Understanding when to use static and non-static members is crucial for designing and implementing effective Java classes.

package Tutorial_00;

public class Blog02 {
	 public static int staticVar = 0; // Static variable
	    
	    public int nonStaticVar = 0; // Non-static variable
	    
	    public static void staticMethod() {
	        // Static method
	        System.out.println("This is a static method.");
	    }
	  
    public void nonStaticMethod() {
        // Non-static method
        System.out.println("This is a non-static method.");
    }

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		Blog02.staticVar = 42; // Accessing static variable
		Blog02.staticMethod(); // Calling static method

		Blog02 obj1 = new Blog02();
		obj1.nonStaticVar = 10; // Accessing non-static variable
		obj1.nonStaticMethod(); // Calling non-static method

		Blog02 obj2 = new Blog02();
		obj2.nonStaticVar = 20;
		obj2.nonStaticMethod();
		
		}
	
	
	}