I want to play this java simulation: http://www.compadre.org/OSP/items/detail.cfm?ID=9640 in java 3d mode on a linux (ubuntu) system. But it doesn't work.
If I switch to java 3d-mode it complains that java 3d is not installed. sudo aptitude install libjava3d-java didn't help.
Then I did a right click in this java app and selected Diagnostics-> About Java 3D.
I want to run my Tomcat with Java 7 but all I found about configuring it doesn't work. The management interface of Tomcat shows 1.6.0_24-b24 as Java version.
I searched askubuntu and tried the suggestions but failed .I try this question:How to completely uninstall/reinstall Java
1.I run sudo apt-cache search openjdk get the following:
openjdk-6-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-6-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-6-doc - OpenJDK Development Kit (JDK) documentation
openjdk-6-jdk - OpenJDK D
Hello, the default java installation is openJDK.
/usr/bin/java -> /etc/alternatives/java
/etc/alternatives/java -> /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
I want to install JDK 1.6, and executed this command:
Code:
alternatives --install /usr/bin/java java /usr/lib/java/jdk1.6.0_45/bin/java 20000
But the symbolic link does change at all. What might be wrong?
I have installed all 3, but the relevant line (as in my original post) is:package_jdk7-openjdk() {
pkgdesc="Free Java environment based on OpenJDK 7.0 with IcedTea7 replacing binary plugs - SDK"
depends=('jre7-openjdk')
provides=('java-environment=7')
conflicts=('java-environment')
# replaces=('openjdk6')This seems to stop it being recog
I have recently installed openjdk just to try out writing some java application
$ dpkg -l | grep jdk
ii openjdk-7-jdk 7u7-2.3.2a-0ubuntu0.12.04.1 OpenJDK Development Kit (JDK)
ii openjdk-7-jre 7u7-2.3.2a-0ubuntu0.12.04.1 OpenJDK Java runtime, using Hotspot JIT
ii openjdk-7-jre-headless 7u7-2.3.2a-0ubuntu
Currently I have these installed on my Scientific Linux 6.3:
[root@localhost ~]# rpm -qa | egrep -i 'java|jre'
java-1.7.0-openjdk-1.7.0.9-2.3.7.1.el6_3.x86_64
java-1.6.0-openjdk-1.6.0.0-1.56.1.11.8.el6_3.x86_64
tzdata-java-2012j-1.el6.noarch
[root@localhost ~]#
Do I need to remove then to be safe from the recent Java vulnerabilities? (If I try to remove the java-1.6.0-openjdk..
I have newly started using linux mint (linux at all).
I have installed two jre versions on it. One openjdk and another oracle jdk.
I was desperately trying to get tomcat running, but sometimes it just stopped responding.
A couple of hours later, i just typed in java -version and about one of ten times it stucked too.
$ java -version
java version "1.7.0_09"
OpenJDK Runtime Environment (IcedTea7 2.3.3) (7u9-2.3.3-0ubuntu1~12.04.1)
OpenJDK Client VM (build 23.2-b09, mixed mode, sharing)
I have no idea, why this sometimes work