Uninstall openjdk Java under ubuntu12.10 to install Sun Java

1. Uninstall the previous JDK and mark all options that contain openjdk in the new version to completely delete it. Or execute sudo apt-Get autoremove openjdk-6-jre 2, download JDK Software

Follow these steps to install Sun JDK:

Slave.

Then configure the Java environment variable:

Set environment variables: Vim/etc/profile or Vim ~ /. Bashrc, add:

Export java_home =/share/software/jdk1.7.0 _ 17
Export Path = $ path: $ java_home/bin: $ java_home/JRE/bin
Export classpath =.: $ java_home/JRE/lib/: $ java_home/lib
Export LD_LIBRARY_PATH = $ java_home/JRE/lib/i386: $ java_home/JRE/lib/i386/Server

3. Configure JDK software: Run: sudo Update-alternatives -- install/Usr/bin/Java/share/software/jdk1.7.0 _ 17/bin/Java300 sudo Update-alternatives -- install/Usr/bin/javac/share/software/jdk1.7.0 _ 17/bin/300 modify the red part by yourself; execute: 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-7-openjdk-i386/JRE/bin/Java 1071 automatic mode
1/share/software/jdk1.7.0 _ 17/bin/Java 300 manual mode
2/usr/lib/JVM/java-7-openjdk-i386/JRE/bin/Java 1071 manual mode

Enter the selected number: 1

Enter

4. Verify the Java
-Version: changed to Sun's JRE.

Run:

Java
Version "1.7.0 _ 17"
Java (TM) se Runtime Environment (build 1.7.0 _ 17-b02)
Java hotspot (TM) server VM (build 23.7-b01, mixed mode)