Please check out this code

Question

public class apples{
public static void main(String[]args){
int i = 1;
mango();
}
public static void mango{
System.out.println(i);
}
}
// how to make int i a global variable????
https://code.sololearn.com/cxKgmydp27Qc/?ref=app

Answer 1

@surya No , outside of main , in the beginning of the class .

public class Test
{
//global variables
static int j , k ;

// main function
public static void main (){

}
}

Answer 2

You have to declare i as a static variable before the main() method. Sorry, I just forgot to tell ya'

Answer 3

You can use the static keyword for making it a global variable :

public static int i = 1;

Now you can access i from anywhere you want :)

Answer 4

Static keyword makes a variable/function shared between all instances of that class, not the actual objects themselves. So if you have a variable:
public static int i = 1; and if you make any changes in one instance, the changes will be reflected in all instances of that class.

Answer 5

@Davye I don't think if static will make it global , atleast for that code he wrote it doesn't work :-P

@Surya. Declare public static int i ; above main to make it global

public class Program {
static int i ;
public static void main(String []args){
i = 1 ;
cool();
}
public static void cool(){
System.out.println(i) ;
}
}

Answer 6

Thanks @Dayve..as I understand public makes it accessible to all the classes..but what does static do?

Answer 7

@Utkarsh..so I would be needing to declare variables in main if I want it to be global...ok

Answer 8

Thanks guys..corrected the bug..a java program starts with the main function, correct?.So if I declare a static variable i before a main function, how can it read it?

Answer 9

thanks @Davyve!! Please do check out the code above. I'm getting 3 errors..