What are best practices for working with finalize (deprecated) and cleaners?

Best practices, finalize, cleaners, Java, memory management, resource management
This document provides best practices for working with deprecated finalize methods and using Cleaners in Java for effective resource management.

    // Example of using a Cleaner in Java
    import java.lang.ref.Cleaner;

    public class Resource implements AutoCloseable {
        private static final Cleaner cleaner = Cleaner.create();
        private final Cleaner.Cleanable cleanable;

        public Resource() {
            cleanable = cleaner.register(this, new StateRestorer());
        }

        private class StateRestorer implements Runnable {
            public void run() {
                System.out.println("Restoring state...");
                // Code to restore state or clean up resources
            }
        }

        @Override
        public void close() {
            cleanable.clean();
            System.out.println("Resource closed.");
        }

        public static void main(String[] args) {
            try (Resource resource = new Resource()) {
                // Use the resource
            }
        }
    }
    

Best practices finalize cleaners Java memory management resource management