Ubuntu12.04 install JDK 7 process Notes: The supervisor copies the file to the/usr/lib/jvm/directory. If no jvm folder exists, create the folder. command: sudomkdirjvm // create the folder jvmsudocp-r ~ /Dow
Notes for installing JDK 7 in Ubuntu 12.04:
1. Download jdk-7u4-linux-i586.tar.gz to oracle_download first
2. Copy jdk-7u4-linux-i586.tar.gz to the/usr/lib/jvm/directory. If no jvm folder exists, create the folder. Run the following command:
Sudo mkdir jvm// Create a folder jvm
Sudo cp-r ~ /Download/Jdk-7u4-linux-i586.tar.gz/Usr/lib/jvm// Copy the downloaded file to the directory created in the heart
Sudo tar-zxvgJdk-7u4-linux-i586.tar.gz// Decompress the file
3,Set environment variables and use gedit to open the/etc/profile file
Sudo gedit/etc/profile
Add the following at the end of the file:
ExportJAVA_HOME=/Usr/lib/jdk1.7.0 _ 04
ExportPATH=$ JAVA_HOME/Bin:$ JAVA_HOME/Jre/bin:$ PATH
ExportCLASSPATH=$ CLASSPATH:.:$ JAVA_HOME/Lib:$ JAVA_HOME/Jre/lib
4. Modify the default jdk of the system.
$ Sudo update-alternatives -- install/usr/bin/java/usr/lib/jvm/java1.7.0 _ 04/bin/java 300
$ Sudo update-alternatives -- install/usr/bin/javac/usr/lib/jvm/java1.7.0 _ 04/Bin/javac 300
$ Sudo update-alternatives -- config java
$ Sudo update-alternatives -- config javac
5. Check and enter java-version
Java version "1.7.0 _ 04"
Java (TM) SE Runtime Environment (build 1.7.0 _ 04-b20)
Java HotSpot (TM) Server VM (build 23.0-b21, mixed mode)
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