1 Observable<Integer> observable = Observable.fromCallable(() -> 1); Create an Observable using “just” operator 1 Observable<Integer> observable = Observable.just(1, 2, 3); Posted in RxJava Guava Function Example: How to use function with Lists.transform()Posted...
We have seen Java’s ways of merging or concatenating collections together. Now, we will see how can we use the Guava library to do so.Before that, make sure you have Guava dependency in your build.Concatenate using Iterables addAll method...
1. Apache Commons Lang – ArrayUtils The simplest way is add the Apache Commons Lang library, and use ArrayUtils. addAll to join arrays. This method supports both primitive and object type arrays. JoinArray.java package com.mkyong.example.array; import org.apache.commons.lang3.ArrayUtils; impor...
Tip: There are more ways to merge lists using libraries like guava or Apache commons lang, but they all useaddAll()method only. So it’s better to use this method directly. 1.2. UsingStream.flatMap() Java 8 streams provide us with one-line solutions to most of the problems and at th...
The first method is ArrayUtil.addAll(). It takes the values of arrays and merges them into one. Since this method is commons of apache; hence in order to use this method, apache.commons.lang3 method needs to be imported first into the compiler. Example Codes: import java.util.Arrays; ...
JavaArrayList.addAll(collection)appends all of the elements of the specifiedcollectionat the endof the currentArrayList.The order of appended elements is the same as they are returned by the argument collection’sIterator. To add a single item to the list, it is preferred to use theArrayList....
There is another way to useGoogle Guava Librarywhich contains several of Google’s corelibrariesthat we rely on in our Java-based projects: collections, caching, primitives support, concurrency libraries, commonannotations, string processing, I/O, and so forth. ...
Pos.BOTTOM_RIGHTAligns the node to the bottom-right corner. Use theGridpane.setAlignment()Method in JavaFX GridPane.setAlignment()in JavaFX adjusts the alignment of child nodes within aGridPane, a grid-based layout manager. It allows precise control over the positioning of elements both horizontally...
I'm trying out the CodeGraph plugin, but when I right-click and select CodeGraph -> Add Element, nothing happens. I tried -> Add...
Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use. But these can also be overused and fall into some common pitfalls. To get a better understandi...