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protected void finalize()

import java.util.*;

class tutorialproTest extends GregorianCalendar {
    public static void main(String[] args) {
        try {
            // Create tutorialproTest object
            tutorialproTest cal = new tutorialproTest();

            // Print current time
            System.out.println("" + cal.getTime());

            // Finalize cal
            System.out.println("Finalizing...");
            cal.finalize();
            System.out.println("Finalized.");

        } catch (Throwable ex) {
            ex.printStackTrace();
        }
    }
}

Sun Oct 11 11:36:46 CST 2020
Finalizing...
Finalized.