Why is try-with-resources catch block selectively optional?

Question

I read that the catch block in try-with-resources is optional. I\'ve tried creating a Connection object in a try-with-resources block, with no subsequ

Answer 1

You could just be throwing the exception up (or catching it in another try-catch block):

private static void test() throws IOException {
    try(InputStream is = new FileInputStream("test.txt")) {
        while(is.read() > -1) {
        }
    } finally {
        // Will get executed, even if exception occurs
        System.out.println("Finished");
    }
}