Hands-On Object-Oriented Programming with Kotlin

Exceptions in Java

In Java, all exceptions are divided into two groups:

• Checked
• Unchecked

If a class isn't a subtype of RuntimeException and it inherits the Exception class, then this class belongs to checked exceptions. If a function throws checked exceptions, then we have to wrap its invoking into the try { ... } catch { ... } finally { ... } block. The finally block can be omitted.

The following example contains the main function that creates a new instance of the FileInputStream class:

public class Example2 {    public static void main(String[] args) {        new FileInputStream("invalid/path");    }}

Since a constructor of FileInputStream throws FileNotFoundException, we can't compile this code. IntelliJ IDEA shows the following tip:

To fix this ...