java jdk
info: How to install java on Ubuntu.
Java is a object-oriented computer programming language developed by James Gosling at Sun Microsystems and released in 1995 lated it has been migrated to
Oracle systems. The code that can runs on one platform does not need to be recompiled.
Install oracle java 7 in ubuntu 12.04
Here I have described about one of the easiest installation method of Oracle-JAVA on Ubuntu using JAVA repository. for more information : http://en.wikipedia.org/wiki/Java_(programming_language)
Open the terminal and run the following commands
# java -version java version "1.6.0_24" OpenJDK Runtime Environment (IcedTea6 1.11.5) (6b24-1.11.5-0ubuntu1~12.04.1) OpenJDK Server VM (build 20.0-b12, mixed mode) # sudo add-apt-repository ppa:webupd8team/java # sudo apt-get update # sudo apt-get install oracle-java7-installer
Now check the new updated verison
# java -version java version "1.7.0_21" Java(TM) SE Runtime Environment (build 1.7.0_21-b11) Java HotSpot(TM) Server VM (build 23.21-b01, mixed mode)
Check the installation directory:
anand@desktop:~$ ll /usr/lib/jvm/java-7-oracle/ total 19720 drwxr-xr-x 8 root root 4096 May 3 09:32 . drwxr-xr-x 6 root root 4096 May 3 09:32 .. drwxr-xr-x 2 root root 4096 May 3 09:32 bin -r--r--r-- 1 root root 3339 May 3 09:32 COPYRIGHT drwxr-xr-x 4 root root 4096 May 3 09:32 db drwxr-xr-x 3 root root 4096 May 3 09:32 include drwxr-xr-x 5 root root 4096 May 3 09:32 jre drwxr-xr-x 3 root root 4096 May 3 09:32 lib -r--r--r-- 1 root root 40 May 3 09:32 LICENSE drwxr-xr-x 4 root root 4096 May 3 09:32 man -r--r--r-- 1 root root 114 May 3 09:32 README.html -rw-r--r-- 1 root root 443 May 3 09:32 release -rw-r--r-- 1 root root 19838528 May 3 09:32 src.zip -rw-r--r-- 1 root root 123324 May 3 09:32 THIRDPARTYLICENSEREADME-JAVAFX.txt -r--r--r-- 1 root root 172252 May 3 09:32 THIRDPARTYLICENSEREADME.txt
That’s all 🙂
Howto: Installing,Upgrading JAVA on Centos,Fedora,Ubuntu,RHEL5
Download JAVA and follow the below installtion steps.
Use Java JDK absolute version (/usr/java/jdk1.7.0_03)
## java ## alternatives --install /usr/bin/java java /usr/java/latest/bin/java 20000 ## javaws ## alternatives --install /usr/bin/javaws javaws /usr/java/latest/bin/javaws 20000 ## Java Browser (Mozilla) Plugin 32-bit ## alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/latest/lib/i386/libnpjp2.so 20000 ## Java Browser (Mozilla) Plugin 64-bit ## alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/latest/lib/amd64/libnpjp2.so 20000
Use Java JRE latest version (/usr/java/latest)
## java ## alternatives --install /usr/bin/java java /usr/java/latest/bin/java 20000 ## javaws ## alternatives --install /usr/bin/javaws javaws /usr/java/latest/bin/javaws 20000 ## Java Browser (Mozilla) Plugin 32-bit ## alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/latest/lib/i386/libnpjp2.so 20000 ## Java Browser (Mozilla) Plugin 64-bit ## alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/latest/lib/amd64/libnpjp2.so 20000
Check current java, javac, javaws and libjavaplugin.so versions
java -version java version "1.7.0_03" Java(TM) SE Runtime Environment (build 1.7.0_03-b04) Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode) javaws Java(TM) Web Start 10.0.0.4-fcs [...] javac -version javac 1.7.0_03
Swap between OpenJDK and Sun/Oracle Java JDK/JRE 6 and 7 versions
JAVA
alternatives --config java There are 5 programs which provide 'java'. Selection Command ----------------------------------------------- * 1 /usr/java/jdk1.6.0_24/jre/bin/java 2 /usr/lib/jvm/jre-1.5.0-gcj/bin/java + 3 /usr/java/jdk1.6.0_26/jre/bin/java 4 /usr/lib/jvm/jre-1.6.0-openjdk/bin/java 5 /usr/java/jdk1.7.0_03/jre/bin/java Enter to keep the current selection[+], or type selection number: 5 Note: java with [+] is currently on use
javaws
alternatives --config javaws There are 3 programs which provide 'javaws'. Selection Command ----------------------------------------------- * 1 /usr/java/jdk1.6.0_24/jre/bin/javaws + 2 /usr/java/jdk1.6.0_26/jre/bin/javaws 3 /usr/java/jdk1.7.0_03/jre/bin/javaws Enter to keep the current selection[+], or type selection number: 3 Note: java with [+] is currently on use
libjavaplugin.so (32-bit)
alternatives --config libjavaplugin.so There are 3 programs which provide 'libjavaplugin.so'. Selection Command ----------------------------------------------- * 1 /usr/java/jdk1.6.0_24/jre/lib/i386/libnpjp2.so + 2 /usr/java/jdk1.6.0_26/jre/lib/i386/libnpjp2.so 3 /usr/java/jdk1.7.0_03/jre/lib/i386/libnpjp2.so Enter to keep the current selection[+], or type selection number: 3.
javac
alternatives --config javac There are 3 programs which provide 'javac'. Selection Command ----------------------------------------------- * 1 /usr/java/jdk1.6.0_24/bin/javac + 2 /usr/java/jdk1.6.0_26/bin/javac 3 /usr/java/jdk1.7.0_03/bin/javac Enter to keep the current selection[+], or type selection number: 3 Note: java with [+] is currently on use
Post-Installation Setup
Add JAVA_HOME environment variable to /etc/profile file or $HOME/.bash_profile file
Java JDK and JRE latest version (/usr/java/latest)
## export JAVA_HOME JDK/JRE ## export JAVA_HOME="/usr/java/latest"
Java JDK and JRE absolute version (/usr/java/jdk1.7.0_03)
## export JAVA_HOME JDK ## export JAVA_HOME="/usr/java/jdk1.7.0_03" ## export JAVA_HOME JRE ## export JAVA_HOME="/usr/java/jre1.7.0_03"
Tech's you need !!!!! 