Understanding Null, Empty List, and Empty Array in Java
As a programmer, it’s essential to differentiate between null, empty lists, and empty arrays when working in Java. Here’s a quick breakdown from my experience:
- Null: It means the reference points to nothing. Accessing it will lead to a NullPointerException. - Empty List: A list that has been initialized but contains no elements, for example:
List<String> list = new ArrayList<>();
- Empty Array: An array that has been initialized with a specific length but contains no values:
String[] array = new String[0];
To avoid confusion, remember that an empty list and an empty array are still objects, hence they can be instantiated, while null is not.
When converting between these types, try to ensure that you're handling potential null values properly to avoid exceptions. It's advisable to always check and fill lists or arrays as needed.
Keep these distinctions in mind to avoid pitfalls in your code! 🚀
Understanding Null, Empty List, and Empty Array in Java
As a programmer, it’s essential to differentiate between null, empty lists, and empty arrays when working in Java. Here’s a quick breakdown from my experience:
- Null: It means the reference points to nothing. Accessing it will lead to a NullPointerException. - Empty List: A list that has been initialized but contains no elements, for example:
List<String> list = new ArrayList<>();
- Empty Array: An array that has been initialized with a specific length but contains no values:
String[] array = new String[0];
To avoid confusion, remember that an empty list and an empty array are still objects, hence they can be instantiated, while null is not.
When converting between these types, try to ensure that you're handling potential null values properly to avoid exceptions. It's advisable to always check and fill lists or arrays as needed.
Keep these distinctions in mind to avoid pitfalls in your code! 🚀
BY Top Java Quiz Questions ☕️
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You can’t. What you can do, though, is use WhatsApp’s and Telegram’s web platforms to transfer stickers. It’s easy, but might take a while.Open WhatsApp in your browser, find a sticker you like in a chat, and right-click on it to save it as an image. The file won’t be a picture, though—it’s a webpage and will have a .webp extension. Don’t be scared, this is the way. Repeat this step to save as many stickers as you want.Then, open Telegram in your browser and go into your Saved messages chat. Just as you’d share a file with a friend, click the Share file button on the bottom left of the chat window (it looks like a dog-eared paper), and select the .webp files you downloaded. Click Open and you’ll see your stickers in your Saved messages chat. This is now your sticker depository. To use them, forward them as you would a message from one chat to the other: by clicking or long-pressing on the sticker, and then choosing Forward.
Can I mute a Telegram group?
In recent times, Telegram has gained a lot of popularity because of the controversy over WhatsApp’s new privacy policy. In January 2021, Telegram was the most downloaded app worldwide and crossed 500 million monthly active users. And with so many active users on the app, people might get messages in bulk from a group or a channel that can be a little irritating. So to get rid of the same, you can mute groups, chats, and channels on Telegram just like WhatsApp. You can mute notifications for one hour, eight hours, or two days, or you can disable notifications forever.
