ashkrit

public Optional<String> getEmail() {
        return Optional.ofNullable(email);
    }

    public Optional<String> getPhone() {
        return Optional.ofNullable(phone);
    }

ashkrit

 //Address has priority , first home and then Office

        if (p.home != null) {
            System.out.println("Contacted at home address " + p.home.address);
            return; // Magical return for early exit
        }

        if (p.office != null) {
            System.out.println("Contacted at office address " + p.office.address);
            return; // Magical return for early exit

ashkrit

//Nested Property
        if (p.getHome() != null) {
            System.out.println("Sending Postal mail " + p.getHome().address);
        }


        if (p.getHome() != null && p.getHome().getInsurance() != null) {
            System.out.println("Sending Notification to insurance " + p.getHome().getInsurance().getAgency());
        }

ashkrit

//Always Happy
        Optional<String> phone = contactNumber(p);
        Optional<String> email = email(p);

        System.out.println("Calling Phone " + phone.get());
        System.out.println("Sending Email " + email.get());

ashkrit

Optional<String> phone = contactNumber(p);
        Optional<String> email = email(p);

        if (phone.isPresent()) {
            System.out.println("Calling Phone " + phone.get());
        }
        if (email.isPresent()) {
            System.out.println("Sending Email " + email.get());
        }

ashkrit

//Not using optional
        if (p.email != null) {
            System.out.println("Sending email to " + p.email);
        }

        if (p.phone != null) {
            System.out.println("Calling " + p.phone);
        }

ashkrit

public class Person {
    final String firstName;
    final String lastName;
    
     final String email; // This can be null
    final String phone; //This can be null
}

ashkrit

public class VerifyCurrentGC {

    public static void main(String... args) {

        var gcBeans = ManagementFactory.getGarbageCollectorMXBeans();

        gcBeans.stream().forEach(gc -> {

            out.println(format("GC Name : %s", gc.getName()));
            var poolNames = gc.getMemoryPoolNames();

ashkrit

public class MemoryAllocator {

    public static final int KB = 1024;
    static int mbToAllocate = Integer.getInteger("mb", 1000);

    public static void main(String[] args) {
        System.out.println(String.format("Start allocation of %s MBs", mbToAllocate));

        for (var i = 0; i < mbToAllocate; i++) {
            var garbage = new byte[KB * KB];

ashkrit

listener, listenError := net.ListenTCP("tcp", addr)
  if listenError != nil {
    return nil, fmt.Errorf("Listen: %s", listenError)
  }