how can we execute|run a java program without main in java with example

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     Can We Execute a java program without main method?

        Yes it is possible by using static block we can execute the java program. Even though 

    we can execute a java program without main method but we can get an error as without 

   main method execution.

   

     For Example:

      public class Demo{

            static{

                 System.out.println(“this is static block”);

                }

            }

    

  After compilation and running it prints the message this is static block. Then it checks for main  method it not exists, then it prints an error message as no main method…..

   To overcome it printing of no main method we use a method called (i.e:) System.exit(0); 

    Following Code represents Execution of java program without main method 

       public class Demo {

               static {

             System.out.println(“this is static block“);

            System.exit(0);

             }

        }