The runtime and the compile-time

Question

Hello,
I am a beginner of java,I want to know something about the runtime and the compile-time.Please explain them to me.
Thanks very much!

Answer 1

Hi,
Consider 2 variables in a class
public class A
         int i = 10;
         final int j = 20;
      public static void main (String a[])
            System.out.println ("Value of i = " + i);
            System.out.println ("Value of j = " + j);
}This is compiled and the compiled class will look like:
public class A
         int i = 10;
         final int j = 20;
      public static void main (String a[])
            System.out.println ("Value of i = " + i);
            System.out.println ("Value of j = " + 20);
}The difference is that the compile time variables are determined and replace by Java where as the variables like i are only executed or processed when the program runs.
This is one example. There are multiple examples.
Thanks and regards,
Pazhanikanthan. P