Trywithresources

Try-with-resources is a Java language feature introduced in Java 7 that automates the management of resources such as streams, files, and sockets. Any resource that implements AutoCloseable (or Closeable) declared in the try parentheses is automatically closed when the block exits, reducing boilerplate and preventing resource leaks.

How it works: Resources are opened in the try header and closed automatically in reverse order when the block completes, whether normally or due to an exception. If an exception is thrown inside the try block and a second exception is thrown while closing resources, the latter is added as a suppressed exception to the former.

Syntax: try (ResourceType r = expression; ResourceType r2 = expression2) {

// use resources

}

Example: try (BufferedReader br = new BufferedReader(new FileReader("data.txt"))) {

String line;

while ((line = br.readLine()) != null) {

// process line

}

} catch (IOException e) {

// handle exception

}

Notes: The resources must implement AutoCloseable (or Closeable). They are local to the try-with-resources statement and are closed automatically at the end of the block. If a resource’s close() method throws and the try block also throws, the exception from the try block is primary and any close() exception is added as a suppressed exception. This feature simplifies code compared with manual try-finally blocks and is commonly used for I/O operations and other resource-heavy tasks.