Exceptions and try-with-resources

Checked vs unchecked, what finally guarantees, and closing files correctly.

12 min read · Lesson 6 of 6 · Pro

An exception is a return path for failure

In C, a function that fails returns -1 or NULL and the caller is trusted to check. Nobody checks every time, so failures get ignored and surface later as corrupted data.

Java takes the other route. When something goes wrong, the method throws an exception: normal execution stops, and the JVM walks back up the call stack looking for a handler. Nothing can be silently ignored.

Java

public class Basic {
    public static void main(String[] args) {
        int[] a = {1, 2, 3};

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