Can we run the Java program without main method?

Can we run the Java program without main method?

Yes, we can execute a java program without a main method by using a static block. Static block in Java is a group of statements that gets executed only once when the class is loaded into the memory by Java ClassLoader, It is also known as a static initialization block.

Is a declaration for the main method in Java program?

Main Method Structure The declaration of the Java main method is: public static void main(String[] args) {

Why Main and Main are not same in Java?

While JVM tries to execute the Java programs it doesn’t know how to create instances of the main class as there is no standard constructor is defined for the main class. The main method is void in Java because it doesn’t return anything to the caller which is JVM.

Why main method is void in Java?

Java main method doesn’t return anything, that’s why it’s return type is void. This has been done to keep things simple because once the main method is finished executing, java program terminates. So there is no point in returning anything, there is nothing that can be done for the returned object by JVM.

Can we override the main method?

No, we cannot override main method of java because a static method cannot be overridden. So, whenever we try to execute the derived class static method, it will automatically execute the base class static method. Therefore, it is not possible to override the main method in java.

How to handle an IOException in Java?

You’ll need to perform the operation in a main (String [] args) method. Your main (String [] args) method will get the IOException thrown to it by countLines and it will need to handle or declare it. Not the answer you’re looking for? Browse other questions tagged java try-catch ioexception or ask your own question.

Can you use IOException in a member declaration?

You can’t use it in a member declaration. You’ll need to perform the operation in a main (String [] args) method. Your main (String [] args) method will get the IOException thrown to it by countLines and it will need to handle or declare it.

Why does the main method not compile in Java?

It will give an error (byte code verification error because in it’s byte code, main is not there) not an exception because the program has not run yet. Note:- However, both the programs will get compile because for compilation we don’t need main () method.

Is the main method mandatory in Java before JDK 7?

Prior to JDK 7, the main method was not mandatory in a java program. You could write your full code under static block and it ran normally.