Analysis of the common technical principles of the RXJAVA framework in the Java class library

Rxjava is a very powerful framework in the Java library to achieve response programming.In this article, we will analyze some of the common technical principles in the RXJAVA framework and provide the corresponding Java code example. 1. Observable (Observation Observer) and Observer (Observer) mode: Rxjava implements responsive programming through Observable and Observer mode.Observable represents an observed data source, while Observer is responsible for observing the source of the data and performing the corresponding operation.The following is a simple example: Observable<String> observable = Observable.just("Hello, World!"); Observer<String> observer = new Observer<String>() { @Override public void onSubscribe(Disposable d) { // Execute some operations during subscription } @Override public void onNext(String value) { // Execute some operations when receiving the data System.out.println(value); } @Override public void onError(Throwable e) { // Execute some operations when there is an error } @Override public void onComplete() { // Execute some operations when completing } }; observable.subscribe(observer); 2. Schedulers (scheduler): RXJAVA manages Observable threads through schedulers.Schedulers provides some methods that can specify Observable's execution threads, threads of observers, and threads of other operations.Common scheduls include `schedulers.io ()` and `AndroidSchers.maintHread ()`.The following is an example: Observable.just("Hello, World!") .subscribeon (schedulers.io ()) // execute Observable on the IO thread .observeon (AndroidSchedulers.maintHread ()) // Observe the results in the main thread .subscribe(value -> { // Execute some operations System.out.println(value); }); 3. Operaors: RXJAVA provides many operators for data streams for conversion, filtration, combination and processing Observable.These operators can be called chain to form a operating chain.Here are some commonly used operators: Observable.just("Apple", "Banana", "Orange") .map (string :: specific) // Convert the string to its length .filter (length-> length> 5) // Filter the string with a filter length of greater than 5 .subscribe(System.out::println); 4. Abnormal treatment: Rxjava allows the use of `` `` `` `)` `` `rThis operator can capture errors from Observable and return a spare Observable to continue processing.The following is an example: Observable.just(1, 2, 0, 4) .map (num-> 10 / num) // Merkly divide the method of each number .onerrorResumenext (observable.just (-1)) // Treatment abnormalities, return the backup Observable .subscribe(System.out::println); 5. Resource management: Rxjava provides the Disposable interface to manage resources.Disposable can be used to cancel subscriptions to avoid memory leakage.The following is an example: Disposable disposable = Observable.interval(1, TimeUnit.SECONDS) .subscribe(System.out::println); // unsubscribe disposable.dispose(); By understanding these common technical principles in the RXJAVA framework, you can better understand and apply the concept of response programming, and use RXJAVA to develop more efficient and flexible procedures in the Java class library.