Does Java read integers in little endian or big endian?

I ask because I am sending a byte stream from a C process to Java. On the C side the 32 bit integer has the LSB is the first byte and MSB is the 4th byte. So my question is: On the Java side when...

Time out error in deploying the process on weblogic server

While deploying the BPEL process in Weblogic 10.3.4, following Exception comes on soa server console. I am sure this is not related to my application, but due to this I am not able to deploy the...

Moving mouse pointer on Android screen programmatically

I am developing an Android application where I would like to move the "mouse" pointer/cursor on an Android tablet. I know this is possible because when I connect a mouse (USB or BT) to an Android...

How to move (or do anything with) the mouse

How to interact with the Windows API using Java and the JNA (Java Native Access)?. I'm trying to make the mouse do something by queuing a mouse event on the mouse input stream, and the code works,...

File upload progress bar using RestTemplate.postForLocation

I have a Java desktop client application that uploads files to a REST service. All calls to the REST service are handled using the Spring RestTemplate class. I'm looking to implement a progress...

Java Record / Mix two audio streams

i have a java application that records audio from a mixer and store it on a byte array, or save it to a file. What I need is to get audio from two mixers simultaneously, and save it to an audio...

Filter Java Stream to 1 and only 1 element

I am trying to use Java 8 Streams to find elements in a LinkedList. I want to guarantee, however, that there is one and only one match to the filter criteria. Take this code: public static void...

Java8: HashMap<X, Y> to HashMap<X, Z> using Stream / Map-Reduce / Collector

I know how to "transform" a simple Java List from Y -> Z, i.e.: List<String> x; List<Integer> y = x.stream() .map(s -> Integer.parseInt(s)) .collect(Collectors.toList()); Now I'd...

What's the difference between map() and flatMap() methods in Java 8?

In Java 8, what's the difference between Stream.map() and Stream.flatMap() methods?

How can I add a PPA repository using Ansible?

I'm trying to add a new repository to a server so that I can install Java by Ansible. Unfortunately whenever I try to run the playbook it fails because of a GPG error. Can somebody explain what is...

Java 8 Filter and Collect of List<Map<String, Object>>

Ok, so I have a List of Maps that I want to filter then collect to another List of Maps. Every time I put that List through the process, I get a List of Objects... Help?! List<Map<String, Object>>...

A better approach to handling exceptions in a functional way

Exceptions, especially checked ones, can severely interrupt the flow of program logic when the FP idiom is used in Java 8. Here is an arbitrary example: String s1 = "oeu", s2 = "2"; Stream.of(s1,...

Reading json objects separated by new line

I am trying to write a test case where I want to stream json objects from a json file separated by new line into Java. I want to stream one event object in Java and serialize it. The json file is...

extract list inside a list as a single list

I've a two POJOs, Sample code below class A { String name; Object entries; // this can be a List<String> or a string - hence Object datatype //getters and setter here } class B { ...

How to map RuntimeExceptions in Java streams to "recover" from invalid stream elements

Imagine I'm building a library, that will receive a Stream of Integers, and all the library code needs to do is return a stream of Strings with the string representation of the number. public...

How to get max of dates list with stream, when having nulls in list

I have following code: List<LocalDate> dates = Arrays.asList(null, null, LocalDate.now(), LocalDate.now().minusDays(9)); LocalDate max = dates.stream() ...

Does every stateful intermediate Stream API operation guarantee a new source collection?

Is the following statement true? The sorted() operation is a “stateful intermediate operation”, which means that subsequent operations no longer operate on the backing collection, but on an...

JAVA 8 Stream filter using Predicate to fetch latest record

I have a method of type boolean which returns stream of data of Predicate type Incident, i want to filter out the latest incident only. public boolean hascompletededucation(LocalDate asOnDate) { ...

Warning in synthesized for lambda desugaring - Migrate from ThreeTenABP to java.time

Recently, we enable Java8 desugaring, in order to port https://github.com/JakeWharton/ThreeTenABP to java.time build.gradle defaultConfig { minSdkVersion 16 targetSdkVersion 29 ...

Closing resource coming as return from method

I have a helper class with a static method that returns a stream: public static InputStream getDocument(File file) throws IOException { ZipFile zipFile = new ZipFile(file); return...

Something went wrong installing the "sharp" module, using node-loader in webpack

I use sharp and webpack with node-loader but I got this error: D:\Downloads\__projects\dev\NodeJs\@eng-dibo\ngx\dist\cms\core\server\express.js:150011 throw new Error(error); ...

Apache embeded FTPS (Mina) issue on Java11+

I have a very simple Java 8 project (FTP server), which uses Apache FTPS (Mina) server library (v. 1.1.1). It is as simple as the following code: ListenerFactory factory = new...

Consuming messages one by one with RabbitMQ and Camel

I have a RabbitMQ broker and a Camel Java application that consumes the messages. The consumer process one message in ca. 1 second. I produce 10'000 messages; this is almost instanteneous....

avoid run Install Task Runner step in EMR cluster

I hope you can help me. I am trying to create EMR cluster with hadoop and spark installed using datapipeline. The problem is this EMR is private so it does not have access to internet to download...

WebRTC connection not working outside of local network

We have the following setup for webrtc two-way video and audio streaming: Mobile Android application using Google WebRTC implementation java wrapper. Tested these two libs: implementation...

IBM java get defaults (to mitigate CVE-2021-44228

how can I dump on Java (IBM Java) the default values to check default of "com.sun.jndi.rmi.object.trustURLCodebase" "com.sun.jndi.cosnaming.object.trustURLCodebase" something like this but for...

filtering a stream changes its wildcard bounds?

the below method compiles without problems: static Stream<Optional<? extends Number>> getNumbers(Stream<Number> numbers) { return numbers.map(Optional::of); } yet if I add a simple filtering...

How to convert XML to String with JAXB and spring-boot?

When I run a mvn spring-boot:run on the folder that has the pom.xml file the application starts and serializes a POJO into a XML correctly, but when I do it by going to the target folder and...

parallelStream for time consuming methods

I have something like this: // sequential version for(var t: tasks){ // run() is a time consuming method (approx. 20-30 seconds) t.run(); } I have approx. 1000 (independent) tasks and...

Stream API allMatch() with mulitple nullable nested objects

I'm working on a request validation feature where I need to check if a certain string value is present in a property that is contained in an object, which is contained as a value of a map entry,...