Java static Keyword

Static Keyword In Java

You can achieve both of these effects with the static keyword.

When you say something is static, it means that a particular field or method is not tied to any particular object instance of that class.

So even if you’ve never created an object of that class you can call a static method or access a static field.

With ordinary, non-static fields and methods, you must create an object and use that object to access the field or method, since non-static fields and methods must know the particular object they are working with.

And static is a non-access modifier.

Now we will see an example -

Example -

class Super {
public int field = 0;
public int getField() { return field; }
}
class Sub extends Super {
public int field = 1;
public int getField() { return field; }
public int getSuperField() { return super.field; }
}
public class FieldAccess {
public static void main(String[] args) {
Super sup = new Sub(); // Upcast
System.out.println("sup.field = " + sup.field +
", sup.getField() = " + sup.getField());
Sub sub = new Sub();
System.out.println("sub.field = " +
sub.field + ", sub.getField() = " +
sub.getField() +
", sub.getSuperField() = " +
sub.getSuperField());
}
}

Output -

sup.field = 0, sup.getField() = 1
sub.field = 1, sub.getField() = 1, sub.getSuperField() = 0