Static variables are created once for a class and shared by all instances. Static variable is created the moment class is loaded.
static variable example
public class Main {
public static int val = 0;
public Main() {}
public static void main(String[] args) {
Main obj1 = new Main();
obj1.val += 1;
Main obj2 = new Main();
obj2.val += 2; // val becomes 3 as both objects refer to same variable
System.out.println(obj1.val);
System.out.println(obj2.val);
}
}3 3
instance variable example
public class Main {
public int val;
public Main() {
val = 0;
}
public static void main(String[] args) {
Main obj1 = new Main();
obj1.val += 1;
Main obj2 = new Main();
obj2.val += 2; // both objects refer to different variables
System.out.println(obj1.val);
System.out.println(obj2.val);
}
}1 2
