Receiving Email using POP3 protocol

In this post under Java Mail, I will explain with example how to receive email using POP3 protocal. The steps involved are 1) Setup the properties object2) Create a Session object3) Get a Store instance using Session’s getStore method4) Connect to the store using email address and application password5) Get the inbox folder from the…… Continue reading Receiving Email using POP3 protocol

Observable Stateless generate method

In this post under RxJava, I will show with example how to create your own custom cold Observable using stateless “generate” method. The custom cold Observable will not hold any state information that’s why I said stateless in the previous statement. Below is the syntax of generate method Syntax public static <T> @NonNull Observable<T> generate(@NonNull…… Continue reading Observable Stateless generate method

Observable defer method

In this post under RxJava, I will show with example how to create an Observable instance with the help of Observable class’s static method “defer”. In all my previous post, we used to create an Observable instance immediately for example Observable<Long> observable = Observable.interval(500, TimeUnit.MILLISECONDS); When the above code snippet is executed, it creates an…… Continue reading Observable defer method

BiConsumer’s andThen Example

In this post under Java, we will explain with an example the andThen method under BiConsumer functional interface. BiConsumer’s andThen method is used to chain one BiConsumer interface implementation with one or more BiConsumer interface implementations. Lets consider an example. I have a list of TCS employees with the class structure as shown below TCSEmployee…… Continue reading BiConsumer’s andThen Example

Observable error and empty method

In this post under RxJava, I will introduce you to Observable class’s two static methods “error” and “empty” methods. The error method creates an Observable instance that will send the error thrown to the Observer/Subscriber. The empty method creates as Observable instance that will not send any item, it just generate completion event to the…… Continue reading Observable error and empty method

Creating Observable from collections

In this post under RxJava, I will explain with example how to create Observable instances from collections. The Observable api provides methods to create Observable instance from Java Array, Collections, and Streams. Below is an example of it Example 1 import java.util.ArrayList; 2 import java.util.List; 3 4 import io.reactivex.rxjava3.core.Observable; 5 6 public class Example2 {…… Continue reading Creating Observable from collections

Observable (Observable’s just method) With Simple Example

In this post under RxJava, I will explain what is an Observable with an example. An Observable is a push based stream of data/events. In other words an Observable pushes items of type T directly to the observer or indirectly to an observer through a chain of operators. Types of Observable They are four types…… Continue reading Observable (Observable’s just method) With Simple Example

BiFunction’s andThen Example

In this post under Java, we will explain with an example the andThen method under BiFunction functional interface. BiFunction’s andThen method is used to chain a BiFunction interface implementation with one or more Function interface implementations. Lets consider an example. I have a list of employess with their salary and percent of bonus to apply…… Continue reading BiFunction’s andThen Example