Non-static block is executed only when a class object is created.
It is executed each time an object is created, and can also access class variables.        

Static block is executed when the class is loaded by the Java Virtual Machine(i.e. when the code is executed).
It is executed once, and can access only the static variables.

Hi,

To access astatic method we don't need any object.
A non-static method is always called using the object of class.

We cannot access a non-static variable inside static method but static variables can be accessed in a non-static method.

Example of a static method:

class Demo
{
   public static void display(String str1, String str2)
   {
       System.out.println("First String is: "+str1);
       System.out.println("Second String is: "+str2);
   }
   public static void main(String agrs[])
   {
      display("ice", "cream");
   }
}

The output will be:
First String is: ice
Second String is: cream

Here, We didn't used an object to call the function. It can be directly called or you can use class name also(class.static_method)

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A non-static method is always called by using object of the class.

Example of a non-static method:

import java.io.*;
class demo_nonstatic
{
   public void display(String str1, String str2)
   {
       System.out.println("First String is: "+str1);
       System.out.println("Second String is: "+str2);
   }
   public static void main(String agrs[])
   {
       demo_nonstatic obj=new demo_nonstatic();
       obj.display("ice", "cream");
   }
}

Here, you can see the method is called using object.