Install multiple JDK versions under Linux __linux

Install multiple JDK versions under Linux

NOV 21ST, 2014 | COMMENTS

4.4 (KitKat) has been used before the SunJDK1.6 version of the original compiled, to 4.4, began to compile with the SunJDK1.7 version, from the Android L start to the current 5.0 Google started to use OPENJDK to compile. So on a computer to do the source code compilation needs to install multiple versions of the JDK.

The system I'm using now is LinuxMint17, based on Ubuntu 14.04.

Now you need to use a few versions of the JDK, so it's all installed and switched as needed. 1.sunjdk1.6

Jdk-6u43-linux-x64.bin can be downloaded here, the installation method can be seen in this Ubuntu configuration Java SE 1.6 2.sunjdk1.7

can go to sunjdk official website download JDK7, after downloading to perform the following command decompression:

TAR-ZVFX jdk-7u72-linux-x64.tar.gz
sudo mv-rf jdk1.7.0_72//opt/jdk1.7.0_72

3.openjdk7

You can install the following command directly on the terminal

sudo apt-get install OPENJDK-7-JDK

After installing the three JDK versions, restart the computer, and then do the following: 1. Check the Java installation First

sudo update-alternatives--display java
sudo update-alternatives--display javac

The results are shown below (I have configured them below)

1 2 3 4 5 6 7 8 9 (15)

apar@g470 ~ $ sudo update-alternatives--display java -Manual mode link currently points to/opt/jdk1.7.0_72/bin/java /opt/ Jdk1.6.0_43/bin/java-Priority /opt/jdk1.7.0_72/bin/java-priority /usr/lib/jvm/java-7-openjdk-amd64/bin/ Java-priority is currently the "best" version for/usr/lib/jvm/java-7-openjdk-amd64/bin/java. apar@g470 ~ $ sudo update-alternatives--display javac javac-Manual mode link is currently pointing to/opt/jdk1.7.0_72/bin/javac /opt/jdk1.6.0_43/bin/javac-Priority /opt/jdk1.7.0_72/bin/javac-priority /usr/lib/jvm/ Java-7-openjdk-amd64/bin/javac-Priority is the current "best" version for/usr/lib/jvm/java-7-openjdk-amd64/bin/javac. apar@g470 ~ $

2). Delete a symbolic link

Perform a command similar to the following to delete a signed link that already exists

sudo update-alternatives--remove java/opt/jdk1.6.0_43/bin/java
sudo update-alternatives--remove javac/opt/ Jdk1.6.0_43/bin/javac

Confirm that the symbolic links (symlinks) are deleted

Java-version
javac-version

3). Reconfigure Java links

Execute a command similar to the following

sudo update-alternatives--install/usr/bin/java java/opt/jdk1.6.0_43/bin/java-
sudo update-alternatives- Install/usr/bin/java Java/opt/jdk1.7.0_72/bin/java
sudo update-alternatives--install/usr/bin/java java/usr /lib/jvm/java-7-openjdk-amd64/bin/java

sudo update-alternatives--install/usr/bin/javac javac/opt/jdk1.6.0 _43/bin/javac
sudo update-alternatives--install/usr/bin/javac javac/opt/jdk1.7.0_72/bin/javac
sudo Update-alternatives--install/usr/bin/javac Javac/usr/lib/jvm/java-7-openjdk-amd64/bin/javac 500

4. Manual switching can be done when needed

sudo update-alternatives--config java
sudo update-alternatives--config javac

The results appear as follows:

1 2 3 4 5 6 7 8 9 24 ( est )

apar@g470 ~ $ sudo update-alternatives--config java [sudo] password for apar: 3 candidates are available to replace Java (provide/usr/bin/j Ava). Select the path priority State ------------------------------------------------------------