This is guide, howto Install Sun/Oracle Java JDK and JRE 7 on
Fedora 15, Fedora 14, Fedora 13, Fedora 12, CentOS 5.6, CentOS 6, Red Hat (RHEL)
5.6, Red Hat (RHEL) 6.
If you’re looking instruction for Sun/Oracle Java JDK/JRE version 6 installation, please check this guide.
What’s new in Sun/Oracle Java 7
- VM
- Compressed 64-bit object pointers
- Garbage-First GC (G1)
- JSR 292: VM support for non-Java languages (InvokeDynamic)
- Lang
- JSR 294: Language and VM support for modular programming
- JSR 308: Annotations on Java types
- JSR TBD: Small language enhancements (Project Coin)
- JSR TBD: Project Lambda
- Core
- Modularization (Project Jigsaw)
- Upgrade class-loader architecture
- Method to close a URLClassLoader
- Unicode 5.1
- Concurrency and collections updates (jsr166y)
- JSR 203: More new I/O APIs for the Java platform (NIO.2)
- SCTP (Stream Control Transmission Protocol)
- SDP (Sockets Direct Protocol)
- Elliptic-curve cryptography (ECC)
- Client
- XRender pipeline for Java 2D
- Forward-port 6u10 deployment features
- Create new platform APIs for 6u10 graphics features
- Nimbus look-and-feel for Swing
- Swing JLayer component
- Web
- Update the XML stack
Read full info from here.
Install Sun/Oracle Java JDK/JRE 7 on Fedora 15/14/13/12, CentOS 5.6/6, Red Hat (RHEL) 5.6/6
1. Download Sun/Oracle Java JDK/JRE 7 32-bit/64-bit RPM packages
Download Sun/Oracle Java 7 from herehttp://www.oracle.com/technetwork/java/javase/downloads/index.html.
Select rpm.bin package (jdk-7-linux-i586.rpm, jdk-7-linux-x64.rpm, jre-7-linux-i586.rpm or jre-7-linux-x64.rpm).
2. Change to root user.
sudo -i
## OR ##
su -
3. Install Java JDK or JRE package
## JDK 32-bit ##
rpm -Uvh /path/to/binary/jdk-7-linux-i586.rpm
## JDK 64-bit ##
rpm -Uvh /path/to/binary/jdk-7-linux-x64.rpm
## JRE 32-bit ##
rpm -Uvh /path/to/binary/jre-7-linux-i586.rpm
## JRE 64-bit ##
rpm -Uvh /path/to/binary/jre-7-linux-x64.rpm
4a. Install Sun/Oracle JDK java, javaws, libjavaplugin.so (for Firefox/Mozilla) and javac with alternatives –install command
## java ##
alternatives --install /usr/bin/java java /usr/java/jdk1.7.0/jre/bin/java 20000
## javaws (32-bit only) ##
alternatives --install /usr/bin/javaws javaws /usr/java/jdk1.7.0/jre/bin/javaws 20000
## Java Browser (Mozilla) Plugin 32-bit ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jdk1.7.0/jre/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/jdk1.7.0/jre/lib/amd64/libnpjp2.so 20000
## Install javac only if you installed JDK (Java Development Kit) package ##
alternatives --install /usr/bin/javac javac /usr/java/jdk1.7.0/bin/javac 20000
alternatives --install /usr/bin/jar jar /usr/java/jdk1.7.0/bin/jar 20000
4b. Install Sun/Oracle JRE java, javaws and libjavaplugin.so (for Firefox/Mozilla) with alternatives –install command
## java ##
alternatives --install /usr/bin/java java /usr/java/jre1.7.0/bin/java 20000
## javaws (32-bit only) ##
alternatives --install /usr/bin/javaws javaws /usr/java/jre1.7.0/bin/javaws 20000
## Java Browser (Mozilla) Plugin 32-bit ##
alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jre1.7.0/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/jre1.7.0/lib/amd64/libnpjp2.so 20000
5. Check current java, javac, javaws and libjavaplugin.so versions
java -version
java version "1.7.0" Java(TM) SE Runtime Environment (build 1.7.0-b147) Java HotSpot(TM) Server VM (build 21.0-b17, mixed mode)
javaws Java(TM) Web Start 1.7.0
[...]
javac -version
javac 1.7.0
Note: Check libjavaplugin.so with restarting Mozilla Firefox and writing about:plugins on address bar.
6. 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/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/jre/bin/javaws
Enter to keep the current selection[+], or type selection number: 3
Note: java with [+] is currently on use
libjavaplugin.so
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/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/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
## export JAVA_HOME JDK ##
export JAVA_HOME="/usr/java/jdk1.7.0"
## export JAVA_HOME JRE ##
export JAVA_HOME="/usr/java/jre1.7.0"