Why do we pass String array in main method in Java?

Because by passing String arrays , we can pass all the necessary parameters like options/arguments related to the program in the form of String easily. There can be several parameters! Also, all the other datatypes can be easily converted from String!

What’s the argument of the main method?

The Argument of String Array in Main Method The argument is the instance which is passed to the method while run time is taking place. If value is passed during run time, it will be populated in “String args []” in the form of an argument. If you do not pass anything it will be empty.

What is the first argument of the string array in main method?

What is the first argument of the String array in main() method? The String array is empty. It does not have any element. This is unlike C/C++ where the first element by default is the program name.

How do you pass an array to the main method in Java?

To pass an array to a function, just pass the array as function’s parameter (as normal variables), and when we pass an array to a function as an argument, in actual the address of the array in the memory is passed, which is the reference.

Why main method is public in Java?

Why is main method public in Java? We know that anyone can access/invoke a method having public access specifier. The main method is public in Java because it has to be invoked by the JVM. So, if main() is not public in Java, the JVM won’t call it.

Why is string immutable in Java?

String is Immutable in Java because String objects are cached in String pool. Since cached String literals are shared between multiple clients there is always a risk, where one client’s action would affect all another client.

What happens if string args is not written in the main () method?

What happens if the main() method is written without String args[]? The program will compile, but not run, because JVM will not recognize the main() method. Remember JVM always looks for the main() method with a string type array as a parameter.