Master Exceptions in Kotlin, handle exception, throw exception, create custom exception скачать в хорошем качестве

Master Exceptions in Kotlin, handle exception, throw exception, create custom exception

An exception is thrown in exceptional circumstances an exception is a type of warning about exceptional situations that pop up at runtime. It’s a way for code to say “Something bad happened, I failed”. You can catch exceptions that are thrown When an exception gets thrown, you have two options for dealing with it: 1. You can leave the exception alone. (Just display error and stop application) 2. You can catch the exception and handle it. (Handle the problem and continue the application) Catch exceptions using a try/catch You catch exceptions by wrapping the risky code in a try/catch block. A try/catch block tells the compiler that you know an exceptional thing could happen in the code you want to execute, and that you’re prepared to handle it. The compiler doesn’t care how you handle it; it cares only that you say you’re taking care of it. Use finally for the things you want to do no matter what If you have important cleanup code that you want to run regardless of an exception, you can put it in a finally block. The finally block is optional, but it’s guaranteed to run no matter what. An exception is an object of type Exception every exception has a function named printStackTrace that you can use to print the exception’s stack trace. Use a safe cast (as?) to avoid getting a ClassCastException. "as? lets you perform a safe explicit cast. If the cast fails, it returns null." You can also create your own types of exception by defining a new class with Exception as its superclass. EXCEPTION RULES: 1. You can’t have a catch or finally without a try. 2. You can’t put code between the try and the catch, or the catch and the finally. 3. A try must be followed by either a catch or a finally. 4. A try can have multiple catch blocks. Telegram Group: https://t.me/androidNinjaWarrior Guide to watch: 00:40 NullPointerExceptions in Kotlin 03:54 What is exception? 06:40 How to catch exception using try-catch-finally in kotlin? 19:20 How to throw exception in Kotlin? 28:38 How to throw exception using preCondition function? 38:41 How to safe cast a variable? 44:38 How to create custom exception in kotlin? 53:38 How to analyze exception? 58:48 Revision of Null and Exception #exception #exceptionhandling #trycatch #TryCatchFinally #CustomException #preDefinedFunction #requireFunction #errorFunction #checkFunction #Kotlin #kotlinException #RuntimeException #SafeCast #throwExceptions Disclaimer- Some content are used for educational purposes under fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational, or personal use tips the balance in favor of fair use. All credit for copyright material used in the video goes to the respected Owner. Thank you guys.