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Java is a high level programming language. Roughly four billion devices run Java, as it is used in almost all computers and mobile phones, as well as other interactive devices. In order to program with Java, a separate JDK has to be installed beyond the normal language kit.

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I have a weird issue with receiving data over SPI - I'm always getting "old" data - the data from previous transmission, not the current one. I want to communicate between Raspberry and ...
mag_zbc's user avatar
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I want send data to/from Arduino Leonardo over SPI using wiringPi/pi4j on Raspberry, using custom GPIO as CS. Raspberry is supposed to be the master, and Arduino slave First my setup: Raspberry Pi 3B ...
mag_zbc's user avatar
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Problem summary I'm trying to set up my raspberry pi 4 as a minecraft server as described here. I've installed the default version of java. The output from java -version is openjdk version "17.0....
r.bot's user avatar
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I am running a discord bot that requires voice commands in my Raspberry Pi 4, and installed OpenJDK 17.0.1 on it. I also used pyenv to install python 3.10 on the Pi, and set the version to be global. ...
LuckElixir's user avatar
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I am reading Can data with Pcan, and I am transferring my Can data to my Raspberry Pi 4. With this code import can import serial # CAN bus setup can_bus = can.interface.Bus(bustype="pcan", ...
Alper's user avatar
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Hey all I have been looking at doing this for some time now. I ran across this posting and this is the type of led strip I am using. However, using that code seems to have errors when trying to add it ...
StealthRT's user avatar
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2 votes
2 answers
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I can't seem to get the right pin number. Let's say I want to access this pin: What's the actual address of the pin? 11, 26 or what? Here's the code I use: (THIS CODE WORKS WITH PIN BCM 23) final ...
nexalbyte's user avatar
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I am trying to use my Raspberry Pi 4's GPIOs to turn on various thing in my smart home. I am getting 2.6V on the GPIO Input, thus resulting in a HIGH signal. I have confirmed this with a basic python ...
Dahlin's user avatar
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I am so new to Raspberry Pi. I want to use pi4j 2 to flash a led that is connected to a raspberry pi. This is my code but the led does not turn on at all: import com.pi4j.Pi4J; import com.pi4j.io.gpio....
Reza Gholipour's user avatar
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2 answers
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Following https://www.hanselman.com/blog/how-to-use-a-raspberry-pi-4-as-a-minecraft-java-server to make a Minecraft server. The only thing I changed is the server jar itself, BUT Minecraft 1.18.2 ...
Nguyen Pham Khoi's user avatar
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I have Raspberry Pi 3 B. And a camera module v. 2.1. I have installed the Raspbian OS 64bit, the latest - "bullseye" Tried to record some video in any way, and after some experimentation, I ...
Ondra Žižka's user avatar
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I'm trying to play a .wav file on my Raspberry Pi (4). My OS is Ubuntu 21.10, 64 bit. My JDK is Open JDK 17.0.1. I've downloaded a sample .wav file to play it. The .wav file located under resources ...
Roy Ash's user avatar
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So I followed The instructions here https://linuxhint.com/install-oracle-java-jdk-16-raspberry-pi/ Except I did so entirely on the gui of Raspberry pi OS. I downloaded the jdk file from the same ...
Justin's user avatar
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-2 votes
1 answer
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I updated my Raspberry Pi to JDK 16 by following part of this tutorial: https://linuxhint.com/install-oracle-java-jdk-16-raspberry-pi/ It worked just fine (when I do java --version, it displayed JDK ...
Jun Jie Yam's user avatar
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I have a computer lab which is set up with piserver and 3B+ raspberry pis. I want my students to be able to write java code that will use the GPIO pins, so they will need to sudo java their programs. ...
KsMomOf2's user avatar
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1 answer
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The issue I'm trying to play sound on a Raspberry Pi 3 B+ through Java, but it doesn't work. I have Written code (shown below) in IntelliJ, and confirmed that it works on Windows 10. Connected ...
kviLL's user avatar
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My goal is to install a Minecraft server on my Raspberry Pi 4B with 8GB RAM. I mainly followed this guide which includes a script to install all of the components quickly. The main commands are: wget -...
X_841's user avatar
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2 votes
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152 views

I'm running a Minecraft server off a RPi4 8gb, but the raspian OSs is 32 bit, limiting the memory I can allocate to the server. There is a beta 64 bit os, but on of the things missing is Minecraft's ...
Jacob N's user avatar
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1 answer
609 views

I'm trying to build OpencCV for Java on raspberry pi 4B. I am quite new in this sphere and do not understand almost everything. At first, I just wanted to unload my .jar file to the raspberry and run ...
crackanddie's user avatar
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6 votes
3 answers
23k views

I am trying to install OpenJDK 16 on my Raspberry Pi 4. I'm running a minecraft server and there was an update recently which requires Java 16, but I have Java 8 installed. There is no openjdk-16-jdk ...
Henry's user avatar
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1 answer
241 views

I have a raspberry pi 4 B and I want to control servo motor. I am using NetBeans IDE and Java programming language with pi4j library for raspberry. Also I have a servo motor that can rotate for 300 ...
crackanddie's user avatar
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I am trying to use a joystick with a MCP3008 in the middle (Connected to GPIO8 - SPI CS0) but I get following error: Exception in thread "main" java.lang.reflect.InvocationTargetException ...
osumatu's user avatar
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I have a program that runs with Processing 2.2.1. I have downloaded Processing 2.2.1 from the Download page, but the Java included in the program is not compatible with the Raspberry Pi. https://...
zetamoon's user avatar
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1 answer
1k views

I have a LABISTS Raspberry Pi 4 B Model B 4GB with Raspbian 10 installed (Buster). I've been trying to follow UniFi - How to Install and Update via APT on Debian or Ubuntu to install the Ubiquiti ...
Dawngerpony's user avatar
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I am trying to install the ARM64 version of Java on my Raspberry Pi model 4. I have already added arm_64bit=1 to the /boot/config.txt file and running uname -a returns Linux pi4 5.10.17-v8+ #1403 SMP ...
SidS's user avatar
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2 answers
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I'm trying to install java 10 on the 64 bit OS. I can install java 11 fine with sudo apt-get install openjdk-11-jdk-headless, but when I do sudo apt-get install openjdk-10-jdk-headless, I get the ...
DPS100's user avatar
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1 answer
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I made a PCB board that can handle measurements and control from a web application made in Java (Vaadin) and I want to connect the RX and TX pins of that PCB board to my Raspberry Pi 4B. I tried to ...
euraad's user avatar
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1 answer
250 views

Got Raspberry Pi 4 with 8Gb of RAM and would like to run Eclipse for it. But Eclipse does not provide 32 bit versions. Can I somehow get running latest version of Eclipse? What latest version I can ...
vico's user avatar
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1 answer
2k views

I'm getting an error trying to launch 1.16.4. Here are the steps I've done so far: Got Minecraft 1.16.1 with Optifine working on my RPI4 following the steps on the How to setup Minecraft 1.16.1 on ...
Backface_Kullah's user avatar
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2 votes
5 answers
4k views

What Java library should I use to control raspberry pi 4b, Pi4J does not support rpi4. Wiringpi is deprecated. I tried searching for others b ut cannot find anything, how to control gpio with java in ...
newbie's user avatar
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1 vote
1 answer
152 views

I am using raspberry pi 4b along with Freenova kit. I am trying to make the LED blink however it does not blink instead it is ON of the time. I have tried different code (C,Python,Java) but none of it ...
newbie's user avatar
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3 votes
1 answer
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I switch the Kernel of my Raspbi 4 to 64 Bit by changing the /boot/config.txt adding arm_64bit=1. After a reboot uname -a shows Linux raspberrypi 5.4.72-v8+ #1358 SMP PREEMPT Mon Oct 26 17:29:14 GMT ...
Nabor's user avatar
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1 vote
3 answers
179 views

I have an RPi which I want to use to interface to a number of different devices via I/O and/or COM. A PC will communicate with it via ethernet and a REST API. The app should be able to start up ...
paul's user avatar
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1 vote
2 answers
3k views

I am basically trying to turn on a led by using pi4j library. My code is pretty simple: public static void main(String args[]) throws InterruptedException { GpioController gpioController = ...
osumatu's user avatar
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0 votes
1 answer
957 views

With Pi4J, I can communicate with I2C with Java. But is there any way I can communicate with I2C with Java, without Pi4J. Just by using Linux internal...shell-ish...command? I want to read and write ...
euraad's user avatar
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1 vote
1 answer
3k views

I'm trying to run a .jar file made in Eclipse using JDK 11 on a raspberry pi 4. For the Raspbian OS I had to use a 64-bit version instead of a 32 bit. I put the jar into a folder together with the ...
HelloThere's user avatar
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0 votes
3 answers
976 views

As of this writing, I have been attempting for some time now to get Minecraft 1.16.2 working on my Raspberry pi 4. I have been using the instructions on this guide which helped me set up Minecraft 1....
Herb_Ren's user avatar
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0 votes
1 answer
151 views

Hi I'm new to Raspberry (Pi 2) and would like to know (1) if it's feasible to develop simple JAVA apps in a development environment (Eclipse? Others?) or failing that from the command line. (2) a ...
Dave's user avatar
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6 votes
2 answers
3k views

I was considering using a Raspberry Pi 4 as a cheap CI/CD server with Jenkins & Maven. Does anyone have a performance comparison of a Pi 4 against a modern Intel Core i3/i5/i7? For example, how ...
The Impaler's user avatar
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1 vote
2 answers
468 views

I installed openJDK8 on a Raspberry Pi 0H with RaspiOS Lite (BUSTER). I also installed wiringpi and pi4j libraries. I added the directories to CLASSPATH in the /etc/environment file and even tried ...
Chris Wolcott's user avatar
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2 votes
1 answer
572 views

I am trying to get a led working with the Raspberry Pin 3 model B+ with Raspbian. I am using Java Pi4j library this way: GpioPinDigitalOutput digitalOutputPin = GpioFactory.getInstance()....
MABC's user avatar
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0 votes
3 answers
4k views

I'm trying to install jdk 14 on my raspbian pi 4b but all tutorials either show how to download open-jdk or how to download an old oracle jdk version. I've already tried to install the .deb file ...
MeineHTMLCodes's user avatar
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2 votes
1 answer
3k views

I installed java 11.0.7-open using sdkman and I get this error: bash: /home/pi/.sdkman/candidates/java/11.0.7-open/bin/java: cannot execute binary file: Exec format error when running java --...
Cimlah's user avatar
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2 votes
2 answers
838 views

I'm currently trying to make a NRF24L01 module work by using Java. I found this library that makes use of the JNI, but I can't get it to work. When I try to run the provided example code the ...
Gereon99's user avatar
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2 votes
0 answers
270 views

I'm in the process of tinkering with something, and for that I need an Arduino to collect measurement data, and a PI to process it all and send it on. My problem is that the connection between my Pi ...
isi_ko's user avatar
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1 vote
1 answer
236 views

I have five Raspberry Pi zero W devices and each device connected to 4 channel relay module. These five devices are in different locations and connected to the internet. We wrote a python program to ...
Nagaraj's user avatar
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0 votes
0 answers
460 views

I want to use my pi as a navigation and weather station on my boat. One of the programs I need is JWX.jar. When I try to execute it, I type "java -jar JWX.jar", wich works flawlesly in Linux Mint and ...
Robert's user avatar
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1 vote
0 answers
159 views

I run Noble on the Raspberry Pi 3 (with Bluetooth) and i receive RSSI values from the nearby beacons that i have. However, if noble is ran the whole times i occasionally get the following error. ...
omar elha's user avatar
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1 vote
0 answers
75 views

I have run my .jar code on Raspberry Pi 3B - Raspbian Buster with Oracle Java 8 (1.8.0_241). The code will completely run after ~80 seconds. It's read that some java versions/models (like openJdk, ...
Mohi Rostami's user avatar
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2 votes
1 answer
1k views

I'm trying to play a video on Processing 3.5.3 with the GLvideo library, but I am getting an error message that Processing cannot load GStreamer. import gohai.glvideo.*; GLMovie video; boolean ...
evvvonder's user avatar
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