Questions tagged [openjdk]

Is a free and open source implementation of the Java programming language. It may be installed from the software centre.

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186 votes
15 answers
479k views

How do I install Java?

How do I install Java, including in my browser, so websites with Java work?
32 votes
8 answers
78k views

How to install Minecraft (Client)

How to correctly install Minecraft, including setting any needed packages or apps to install it and to troubleshoot the most common problems that Ubuntu users face when trying to use Minecraft. I am ...
Luis Alvarado's user avatar
203 votes
9 answers
983k views

How to completely uninstall Java?

How can I completely remove all traces of Java on my system? I already know how to install it in case I need it again.
CaldwellYSR's user avatar
  • 2,197
134 votes
8 answers
403k views

How do I install openjdk 7 on Ubuntu 16.04 or higher?

I would like to upgrade my main system to 16.04, but I work on projects that require OpenJDK 7. Apparently it is not available from a trivial apt-get install openjdk-7-jdk. Only versions 8 and 9 are ...
onairda's user avatar
  • 3,045
4 votes
5 answers
14k views

Installing Java 7 in 16.04 and using multiple Java versions

I already installed Java 8, but I don't know how to install Java 7 and how to switch between the two Java versions. I also want to switch between Java 7 and 8 to update a project I am working on. I ...
Geemo's user avatar
  • 133
181 votes
6 answers
585k views

Switch between multiple java versions

While installing Android Studio on Ubuntu 14.04 I get the message that my Java version (javac 1.7.0_79) is causing problems. I found a solution of how to install a newer Oracle version of Java: sudo ...
mcExchange's user avatar
  • 3,088
72 votes
2 answers
21k views

Why is OpenJDK 10 packaged as openjdk-11-*?

While looking to compile OpenJDK from source, the newest General Availability version (OpenJDK 10.0.1) insists on OpenJDK 9 or 10. JDK 11, however, is not due to be released until September 2018. ...
tudor -Reinstate Monica-'s user avatar
324 votes
12 answers
993k views

How to install OpenJDK 8 on 14.04 LTS?

Java 8 is now available according to http://openjdk.java.net/projects/jdk8/, but http://openjdk.java.net/install/ does not yet mention how to install OpenJDK 8 (not Oracle Java) on Ubuntu 14.04 Long ...
Thorbjørn Ravn Andersen's user avatar
9 votes
3 answers
25k views

How to get Scilab 6.0.1 working on Ubuntu 18.04 LTS?

I have installed clean Ubuntu MATE 18.04 LTS and installed Scilab from repository here with sudo apt-get update sudo apt-get install scilab After installation I tried to launch it from GUI (...
N0rbert's user avatar
  • 99.8k
6 votes
3 answers
16k views

Update to latest version of java after ppa is discontinued

I have been trying to install the latest version of java-8. However, I found out that the PPA ppa:webupd8team/java has been discontinued due to changes in the java licence. How should I update my ...
deann's user avatar
  • 183
3 votes
1 answer
4k views

No 'Open with' option to open/run jar file with openjdk

I have run sudo apt-get install openjdk-7-jre It says Reading package lists... Done Building dependency tree Reading state information... Done openjdk-7-jre is already the newest version. ...
Jack McDowell's user avatar
41 votes
6 answers
209k views

Setup and install IntelliJ with JDK

Is there any scripts for downloading and installing IntelliJ with JavaJDK or OpenJDK? I don't know how I did it before using Ubuntu 12.10 but I'm now on a fresh 13.04 install and I have been looking ...
spences10's user avatar
  • 2,592
18 votes
2 answers
36k views

Changing JVM in Java

I only recently discovered the different JVM's on the wiki page and thought I'd start tinkering. Its been difficult to find documentation on how to configure Java on Ubuntu though. Lets say I wanted ...
OVERTONE's user avatar
  • 2,307
92 votes
2 answers
64k views

Can not install 'openjdk-9-jdk' because it tries to overwrite file aready included in 'openjdk-9-jdk-headless' [duplicate]

I'm running Ubuntu 16.04 Xenial desktop, 64 bit, and wanted to install openjdk-9-jdk (Java 9 development kit). The version available from the universe repository is 9~b114-0ubuntu1. Running the ...
Byte Commander's user avatar
  • 107k
53 votes
8 answers
120k views

Problems with Eclipse and Android SDK

I installed Eclipse, openjdk6 and downloaded and extracted the sdk manager file. Now, When I created an Android project I got the following error: 2012-06-06 18:44:40 - contactManager] /home/catia/...
csbl's user avatar
  • 691
30 votes
3 answers
86k views

How can I install OpenJDK on Ubuntu 16.04? [duplicate]

Since I upgraded to the latest version of Ubuntu, I cannot install the Java OpenJDK package needed to compile Android custom ROMs. When I run sudo apt-get install openjdk-7-jdk, the following error ...
Hakam El Assouad's user avatar
15 votes
4 answers
31k views

Minecraft with OpenJDK 7, I get "the trustAnchors parameter must be non-empty"

Im using Ubuntu 15.04 and OpenJDK 7, trying to run Minecraft. This is what I get. EDIT: Minecraft is working now when I use sudo java -jar Minecraft.jar but doesn't work without super user, how would ...
ashermaster's user avatar
14 votes
5 answers
81k views

How can I make a .jar file executable?

I'm trying to run a jar application under Ubuntu, so I installed OpenJDK Java 7 Runtime, but when I open this application I got this message : The file '/home/aimad/Programms/jMerise/JMerise.jar' ...
Croviajo's user avatar
  • 1,154
14 votes
5 answers
12k views

Will Sun's Java be available from Canonical's partner repository?

I just discovered that Oracle's (Sun's) Java6 has vanished from the Canonical's partner repository. Before Java was taken from all repositories I had purchased Minecraft for play in Ubuntu. After ...
Moma Antero's user avatar
85 votes
4 answers
200k views

Setting JDK 7 as default

four@twenty:~$ file /etc/alternatives/java /etc/alternatives/javac /etc/alternatives/java:symbolic link to `/usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java' /etc/alternatives/javac:symbolic link to `/...
Wingsuit's user avatar
  • 969
60 votes
7 answers
400k views

How to uninstall OpenJDK?

I don't want OpenJDK installed on my Ubuntu 13.04 system, but trying to uninstall the openjdk-7-jre yields the following message: $ sudo apt-get purge openjdk-7-jre Reading package lists... Done ...
Sandra's user avatar
  • 703
54 votes
7 answers
226k views

Installing Chrome Java Plugin

I've been trying to install the Java plugin for Chrome for a couple hours now, and I figured it was time to ask people with more experience. I can't seem to get it working. My current Java version is ...
kyleskool's user avatar
  • 641
5 votes
3 answers
25k views

Can't reset my JAVA_HOME to new Open JDK 11 Java installation

OS: UBUNTU 18.04 I had installed Oracle Java 8 earlier. But decided to switch to open JDK 11. it's successfully installed. java -version openjdk version "11.0.2" 2019-01-15 OpenJDK Runtime ...
pra-bhu's user avatar
  • 53
3 votes
2 answers
5k views

How to fix Eclipse with OpenJDK 9

I have installed OpenJDK 9 in Ubuntu 17.10. I wanted to start developing in Java, and I did setup JAVA_HOME variable and did some stuff I found on the internet. I can compile a Java program and run it,...
Gameerik's user avatar
104 votes
4 answers
459k views

How can I tell what version of Java I have installed?

I want to start toying around with java (eventually getting to the point where I can write basic little programs for android or web), but I've managed to have java messed up on my computer (from past ...
Stramato's user avatar
  • 1,467
24 votes
5 answers
27k views

How to install the OpenJDK 8 (Ubuntu 19.04)?

Only openjdk-11-jdk and newer seem to be available. Is there any way to install the OpenJDK 8? Preferably without adding a PPA.
FliegendeWurst's user avatar
15 votes
3 answers
72k views

IcedTea plugin for OpenJDK 8

I updated from OpenJDK 7 to 8. I uninstalled 7, which uninstalled the IcedTea plugin as well. I tried to reinstall IcedTea with sudo apt-get install icedtea-7-plugin But it doesn't work. When I ...
Srikanth R's user avatar
8 votes
4 answers
31k views

How to make Firefox use the newest Java version, which is already installed?

Apparently, I have OpenJDK 6 JRE (openjdk-6-jre 6b27-1.12.6-1ubuntu0.12.04.2) and 7 JRE (openjdk-7-jre 7u25-2.3.10-1ubuntu0.12.04.2) installed in parallel – I don't know why I have both of them, I can'...
lenz's user avatar
  • 260
4 votes
3 answers
94k views

How to setup Java-Home and Path in Ubuntu 12.04

we are new to Ubuntu.Recently we changed my server OS to ubuntu 12.04 from windows 7 . every one have their own login details. one of my college installed Open-Jdk7. I asked him, where you installed ...
ur truly friend's user avatar
2 votes
1 answer
2k views

Why Oracle discontinued Oracle Java (JDK) Installer PPA? [closed]

I tried to install OracleJDK 8 using sudo add-apt-repository ppa:webupd8team/java But it's not working. I searched the problem and found that "The Oracle JDK License has changed for releases ...
AJAY_AJ's user avatar
  • 21
59 votes
4 answers
108k views

Replace openjdk with oracle-jdk on Ubuntu

I have an ubuntu system and I want to replace my openjdk with oracle-jdk. However if I remove my open-jdk and then install oracle-jdk, when I try to install some packages they want to install ...
littleali's user avatar
  • 717
47 votes
8 answers
332k views

How to set the JDK for Android Studio?

I can't compile a default new project for Android 2.1 because(?) the JDK used by Android Studio is JDK 1.7 but it should be JDK 1.6. To change it I go to File -> Project Structure and try to find the ...
Lucio's user avatar
  • 18.8k
27 votes
1 answer
70k views

OpenJDK - Oracle is better? [closed]

From http://www.wikihow.com/Install-Oracle-Java-on-Ubuntu-Linux Type/Copy/Paste: java -version . If you're having OpenJDK Runtime Environment (IcedTea6 1.10pre) (7b15~pre1-0lucid1) OpenJDK 64-Bit ...
Incerteza's user avatar
  • 1,470
27 votes
5 answers
70k views

17.10 openjdk and oracle jdk 8 and 9 the trustAnchors parameter must be non-empty

I've just installed 17.10 in a fresh VM. Trying to set up a development environment, when I run gradle or ./gradlew I get the following error: * What went wrong: Error resolving plugin [id: 'com....
junglie85's user avatar
  • 469
20 votes
3 answers
33k views

How can I select which Java to use?

I have installed both OpenJDK 6 and 7. When I run "java somefile" from the command line, OpenJDK 6 is invoked. I do not want to change this default behavior. What command can I use to run my non-...
Katherine Rix's user avatar
20 votes
2 answers
30k views

How to tell if a certain package exists in the apt repos? [duplicate]

I am specifically interested in determining whether a 32-bit version of OpenJDK 8 exists in the apt/Ubuntu repos. According to this answer, you can install the 32-bit version of the Open JDK 7 ...
smeeb's user avatar
  • 315
8 votes
1 answer
6k views

How to prevent openjdk-6-jre-headless from clobbering Oracle JDK installation?

My automated build server runs a job that depends on Apache Ant. The script invokes apt-get install ant. Ant depends on openjdk-6-jre-headless which runs update-alternatives making itself the default ...
Gili's user avatar
  • 1,285
8 votes
9 answers
56k views

IcedTea-8 cannot run any jnlp application (maybe due to openjdk-11?)

I'm on Ubuntu MATE 18.04. All the jnlp applications I tried give execution error. After inspection, some libraries seem to be missing in Java. So I removed everything, started installation again, and ...
Roman Rdgz's user avatar
8 votes
5 answers
13k views

OpenJDK-8/Oracle JDK 8 Font Patches for Ubuntu

Is there a patched version of OpenJDK-8 or Oracle JDK 8 for Ubuntu 14.10 which fixes ugly fonts in Java Applications (Jetbrains products, Netbeans etc.)? I had previously installed a patched version ...
Deepal's user avatar
  • 1,656
8 votes
4 answers
37k views

How to install JDK8 on Ubuntu 16?

I needed JDK 8 for Bazel. I ran sudo apt-get install openjdk-8* on a freshly built Ubuntu 16.04.02 machine, but after installation update-alternatives --config java show two paths: /usr/lib/jvm/java-...
Old Geezer's user avatar
7 votes
2 answers
15k views

What's the difference between OpenJDK and Sun Java for the end user? [closed]

For users running Java application or applets in the browser, what difference does it make running either Sun Java or OpenJDK? EDIT Oracle will be retiring the DLJ, and basing the proprietary ...
Oxwivi's user avatar
  • 17.8k
6 votes
3 answers
4k views

How to revert back to OpenJDK?

I had installed sun-java, but I want to revert back to OpenJDK 7. I was trying to re-install from the terminal using the command sudo apt-get install openjdk-7-jre, same from Synaptic and Software ...
yyeshua's user avatar
  • 61
6 votes
2 answers
2k views

is OpenJDK Vulnerable to 0-Day Exploit?

I was curious to know if OpenJDK is also vulnerable to the Zero-Day Exploit that is currently afflicting Java 7 because of which experts are telling people to disable Java until a solution is found on ...
ya'AxchéBalam's user avatar
6 votes
3 answers
37k views

How to install openjfx along with openjdk-11?

I am trying to use openjdk-11 on ubuntu, but my project requires javafx. There is an openjfx package but it installs alognside with openjdk-8. So far I only found instructions to build both openjdk ...
Thiago Sayão's user avatar
4 votes
4 answers
15k views

Do I have log4j on my Ubuntu 18.04.6?

I'm obviously worried about this vulnerability, but I wonder if I even have this library on my machine? The machine is a webserver running a couple of node expressjs frameworks over nginx, plus a ...
minisaurus's user avatar
3 votes
2 answers
3k views

How to make pdfsam work in (L)ubuntu 18.04?

I have the following versions of OpenJDK installed: java-1.11.0-openjdk-amd64 1101 /usr/lib/jvm/java-1.11.0-openjdk-amd64 java-1.8.0-openjdk-amd64 1081 /usr/lib/jvm/java-1.8.0-...
bomben's user avatar
  • 2,059
3 votes
2 answers
7k views

Problem running jar from gui in 15.04

I updated ubunut to 15.04 today. Now when I try starting a jar file from the gui it only opens the archive manager. Checking the open with tab in Properties I can't find Openjdk. I got both Openjdk ...
Skadlig's user avatar
  • 211
2 votes
2 answers
6k views

Setup JDK for android studio

I was setting up android studio and got this So I followed the answer here and used sudo update-alternatives --set java /usr/local/java/jdk1.7.0_17/jre/bin/java sudo update-alternatives --set ...
Qwertie's user avatar
  • 886
0 votes
1 answer
2k views

OpenJDK not running .jar files

I've downloaded the .jar file for Minecraft, and I installed OpenJDK 6 from the software center, and I tried with 7 as well, but it keeps throwing the message "The file '/home/hunter/Downloads/...
Hunter Peters's user avatar
0 votes
1 answer
13k views

JAVAFX_HOME path on ubuntu

So my problem is openjfx and using it on Scala-sbt project. The actual problem is JAVAFX_HOME path. First of all I have java version 10.0.2 installed on my computer and openjfx (which I take as JavaFX)...
Hjell's user avatar
  • 1