Question

I have my main class from which i call my sub class.

My sub class contains some public static variables like

    public class SubClass2 extends Main {


     public static  long a = 0;
     public static  long b = 0;
     public static  long c= 0;

    public void Analyze(int number)
    {
      b=2;

    //some code
     }
    }

Where as in main i call the object of the SubClass2.I want everytime when i make the new object of the subclass2 in main then it initializes
all the variables =0 but when i take the print statement of the variable b.It prints out like 4.It adds up the previous value with the new value.

Answer 1

Your fields should not be declared as static in that case. This is why they’re not being initialised each time. A static field is initialised once only, then shared by every instance of the class, and depending on accessibility, also outside of the class.

The logic that led to the value 4 must be in the code you’ve replaced with //some code, but this ins’t really relevant here.

If for whatever reason these really should be static fields that are initialised each time an instance is instantiated, then you would have to initialise them manually in the class’s constructor. But I’d seriously question the design that leads to this situation…