Question

Could you please explain me any real time scenario (or) JAVA API examples for static field without final keyword ?

I have seen in Runtime.java; to make singleton They have declared like below

private static Runtime currentRuntime = new Runtime();

But here also we need final right ?

Answer 1

Counter of all instances of certain type:

class MyClass {
    private static int count = 0;
    public MyClass() {
        count++;
    }
    public static int getCount() {
        return count;
    }
}

Other example is classic singleton pattern.