Table of Contents
What is the difference between public void and static void in Java?
1 Public: It is an Access modifier, which specifies from where and who can access the method. 2 Static: It is a keyword which is when associated with a method, makes it a class related method. 3 Void: It is a keyword and used to specify that a method doesn’t return anything. 4 main: It is the name of Java main method.
Why do we write “static” before the main method in Java?
Hence making it a convention to make the entry method ‘main ()’ as ‘public static void main (String [] args)’ is convenient. What if we don’t write “static” before the main method: If we do not write “static” before the main method then, our program will be compiled without any compilation error (s).
What does “main class failed to load” mean in Java?
The error indicates that the java command failed to find or load the main class. It occurs when we try to run a program. When the error occurs, the JVM shows the following error message on the console:
Why main method has to be public in Java?
public This is the access modifier of the main method. It has to be publicso that java runtime can execute this method. Remember that if you make any method non-public then it’s not allowed to be executed by any program, there are some access restrictions applied. So it means that the main method has to be public.
Why is the main() method of a class static?
The main () method is static so that JVM can invoke it without instantiating the class. This also saves the unnecessary wastage of memory which would have been used by the object declared only for calling the main () method by the JVM.
What is the meaning of int value returned from main in C?
The int value returned from main in C and C++ is exit code or exit status. The exit code of C or C++ program illustrates, why the program terminated. Exit code 0 means successfull termination. However, non zero exit status indicates error. Eg, exit code 1 depicts Miscellaneous errors, such as “divide by zero”
What is the name of the String[] args?
String[] args: It stores Java command line arguments and is an array of type java.lang.String class. Here, the name of the String array is args but it is not fixed and user can use any name in place of it.