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 ☕️
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Tata Power whose core business is to generate, transmit and distribute electricity has made no money to investors in the last one decade. That is a big blunder considering it is one of the largest power generation companies in the country. One of the reasons is the company's huge debt levels which stood at ₹43,559 crore at the end of March 2021 compared to the company’s market capitalisation of ₹44,447 crore.
Telegram auto-delete message, expiring invites, and more
elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.
