Hands-On Object-Oriented Programming with Kotlin

What is exception handling?

If the execution of a function can't be completed, an exception can be thrown. The most common causes of this are listed as follows:

• Invalid incoming data
• A file cannot be found
• Termination of a network connection
• Java Virtual Machine needs more available memory

The throw keyword is used to interrupt the execution of a current function and to notify a caller about an exceptional event. Let's look at the constructor of the FileInputStream class:

public FileInputStream(File file) throws FileNotFoundException {    String name = (file != null ? file.getPath() : null);    SecurityManager security = System.getSecurityManager();    if (security != null) {        security.checkRead(name);    }    if (name == null) {        throw new NullPointerException ...