Ich erstelle ein Beispiel-Demo-Programm, um zu verstehen, wie ich die Referenz von statischen Variablen und Methoden in Java mithilfe von Garbage Collector freigeben kann.

Ich verwende Weak Reference, um den Garbage Collector nicht zu behindern.

KlasseSample

public class Sample {

    private static String userName;
    private static String password;
    static {
        userName = "GAURAV";
        password = "password";
    }
    public static String getUserName(){
        return userName;
    }
    public static String getPassword(){
        return password;
    }
}

KlasseUser

import java.lang.ref.WeakReference;

public class User {

    public static void main(String[] args) {
        /**
         * Created one object of Sample class
         */
        Sample obj1 = new Sample();
        /**
         * I can also access the value of userName through it's class name 
         */
        System.out.println(obj1.getUserName()); //GAURAV
        WeakReference<Sample> wr = new WeakReference<Sample>(obj1);
        System.out.println(wr.get());  //com.test.ws.Sample@f62373
        obj1 = null;
        System.gc();
        System.out.println(wr.get()); // null
        /**
         * I have deallocate the Sample object . No more object referencing the Sample oblect class but I am getting the value of static variable. 
         */
        System.out.println(Sample.getUserName()); // GAURAV
    }

}