Install JDK6.27 in Ubuntu11.10

1. First download: Upload

1. Download:

Http://www.oracle.com/technetwork/java/javase/downloads/jdk-6u27-download-440405.html

Select:

Linux x86-Self Extracting Installer

81.20 MB

Jdk-6u27-linux-i586.bin

2. Create a Java directory and decompress the downloaded file to the directory:

$ Sudo cp jdk-6u27-linux-i586.bin/usr/lib/jvmFor those who are new to Alibaba Cloud, copy/Usr/lib/jvm. Check the starting position.

$ Cd/usr/lib/jvm

$Chmod u + xJdk-6u27-linux-i586.bin 

$ Sudo./jdk-6u27-linux-i586.bin
$ Sudo mv jdk1.6.0 _ 27/java-1.6.0_27-sun/
$ Sudo ln-s java-1.6.0_27-sun java-6-sun
$ Sudo rm jdk-6u27-linux-i586.bin.

3. Set the environment variables, including PATH, CLASSPATH, and JAVA_HOME. Note the bin directory added at the end of PATH:

$ Sudo vi/etc/environment
PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games: /usr/lib/jvm/java-6-sun/bin"
CLASSPATH = "/usr/lib/jvm/java-6-sun/lib"
JAVA_HOME = "/usr/lib/jvm/java-6-sun"

4. Then we want to tell the system that we are using sun's JDK, www.linuxidc.com, rather than OpenJDK:

$ Sudo update-alternatives -- install/usr/bin/java/usr/lib/jvm/java-6-sun/bin/java 300

$ Sudo update-alternatives -- install/usr/bin/javacjavac/usr/lib/jvm/java-6-sun/bin/javac 300

$ Sudo update-alternatives -- config java

Two candidate items can be used to replace java (/usr/bin/java ).
Select the path priority status
------------------------------------------------------------
0/usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 automatic mode
1/usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
* 2/usr/lib/jvm/java-6-sun/bin/java 300 manual mode

To maintain the current value

Press ENTER or enter the selected number: 2

As shown above, you have set the java to be used. Finally, let's verify:

$ Java-version
Java version "1.6.0 _ 27"
Java (TM) SE Runtime Environment (build 1.6.0 _ 27-b07)
Java HotSpot (TM) Server VM (build phases 2-b06, mixed mode)

After finishing your work!