Why do I write "String" instead of "int" after "public static void" even if I just add some integer in a code?

Question

Public class confused {

Public static void (String[] args) { /*This "String" here*/

int x = 5;
int y = 6;

system.out.println(x + y);

}
}

Answer 1

for eg:
public static void doAdd(int a, int b){
int c= a+b;
//or do int c=3+5;
}
In above code^^^ a and b are called arguments ..when we call the method we pass the value of a & b.

Similarly, Java code starts running from
main(string[] args)

here string[] args... indicates that argument or input of method is "array of strings " (int[] will indicate array of int) and variable name of argument is args...

So now, If (only if not compulsion) you can use that variable like

String fullName = args[0]+ args[1];

It doesn't matter if you don't use it... to use or not use is totally up to you

I hope it's clear ...

Answer 2

ADDED TO @VEdward's answer.Here is a clear example, Consider a method named add, used to add 2 integers,

public static void add(int a , int b){
System.out.print(a+b);}

Hence when you call this method using,

add(5,7);

output is 12 ,printed on console.THIS is only possible if I use integer parameters (or arguments) NOTE:- 5and 7 are parameters.

if I add doubles,

add(3.4,5.5);

this would show error, as there is no method named add that takes double parametes.

Answer 3

Forgot "main". String is for parameter, you can run your programme​ with.(eg java myjar.jar -bla bla)It is just the way, how software works and Java is a language, that forces you to write your code more strict formatted as it would be the case with js/c/c++.

Answer 4

Thanks. This helped a lot :)