In my journey as a developer, I've encountered many scenarios where nullability caused headaches. Enter the Optional class in Java! This nifty feature helps us avoid the dreaded NullPointerException.
What's Optional? - A container object which may or may not contain a non-null value. - It provides methods like isPresent(), get(), and ifPresent() to manage values safely.
Creating an Optional: You can create an Optional in two ways: 1. Optional.of(value) - returns an Optional with a non-null value. 2. Optional.ofNullable(value) - returns an empty Optional if the value is null.
Example:
Optional<String> name = Optional.ofNullable("John"); if (name.isPresent()) { System.out.println(name.get()); } else { System.out.println("Name not found"); }
Best Practices: - Use Optional as a method return type, not for fields. - Avoid using get() unless you're sure a value is present.
By leveraging Optional, we can write cleaner, safer code. Embrace this feature to enhance your Java projects! 🌟
In my journey as a developer, I've encountered many scenarios where nullability caused headaches. Enter the Optional class in Java! This nifty feature helps us avoid the dreaded NullPointerException.
What's Optional? - A container object which may or may not contain a non-null value. - It provides methods like isPresent(), get(), and ifPresent() to manage values safely.
Creating an Optional: You can create an Optional in two ways: 1. Optional.of(value) - returns an Optional with a non-null value. 2. Optional.ofNullable(value) - returns an empty Optional if the value is null.
Example:
Optional<String> name = Optional.ofNullable("John"); if (name.isPresent()) { System.out.println(name.get()); } else { System.out.println("Name not found"); }
Best Practices: - Use Optional as a method return type, not for fields. - Avoid using get() unless you're sure a value is present.
By leveraging Optional, we can write cleaner, safer code. Embrace this feature to enhance your Java projects! 🌟
BY Top Java Quiz Questions ☕️
Warning: Undefined variable $i in /var/www/tg-me/post.php on line 283
n the U.S. people generally use Bitcoin as an alternative investment, helping diversify a portfolio apart from stocks and bonds. You can also use Bitcoin to make purchases, but the number of vendors that accept the cryptocurrency is still limited. Big companies that accept Bitcoin include Overstock, AT&T and Twitch. You may also find that some small local retailers or certain websites take Bitcoin, but you’ll have to do some digging. That said, PayPal has announced that it will enable cryptocurrency as a funding source for purchases this year, financing purchases by automatically converting crypto holdings to fiat currency for users. “They have 346 million users and they’re connected to 26 million merchants,” says Spencer Montgomery, founder of Uinta Crypto Consulting. “It’s huge.”
Newly uncovered hack campaign in Telegram
The campaign, which security firm Check Point has named Rampant Kitten, comprises two main components, one for Windows and the other for Android. Rampant Kitten’s objective is to steal Telegram messages, passwords, and two-factor authentication codes sent by SMS and then also take screenshots and record sounds within earshot of an infected phone, the researchers said in a post published on Friday.
