Direct download jdk installed archive
1. official website to download JDK
Address: http://www.oracle.com/technetwork/articles/javase/index-jsp-138363.htmlSelect the appropriate package download .gz
2. decompression, placed in the specified directory (in jdk-7u60-linux-x64.gz Example)
Create a directory:
sudo mkdir /usr/lib/jvm
Add compression to the directory:
sudo tar -zxvf jdk-7u60-linux-x64.gz -C /usr/lib/jvm
3. modify environment variables:
sudo vim ~/.bashrc
End of the file append the following contents:
Oracle jdk Environment #set
Export the JAVA_HOME = / usr / lib / JVM / jdk1.7 .0_60 ## to be replaced is noted here that the directory own directory jdk extracting Export the JRE_HOME the JAVA_HOME = $ {} / JRE Export the CLASSPATH =:. $ { } the JAVA_HOME / lib: $ {} the JRE_HOME / lib the PATH = $ {Export the JAVA_HOME} / bin: $ the PATH
The environment variables to take effect immediately
source ~/.bashrc
4. Set the default jdk version
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_60/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_60/bin/javac 300 sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7.0_60/bin/jar 300 sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/jdk1.7.0_60/bin/javah 300 sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/jdk1.7.0_60/bin/javap 300
Then execute:
sudo update-alternatives --config java
If the initial installation jdk, there will be the following tips
There is only one alternative in link group java (providing /usr/bin/java):
/usr/lib/jvm/jdk1.7.0_60/bin/java
No person, choose the right jdk
5. Test jdk
java -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
jdk installation is successful