Install and configure the JDK1.6.30 service in Ubuntu11.10

Installation environment: Ubuntu11.1032 bit, jdk-6u30-linux-i586.bin. 1. download JDK. Official http://www.oracle.com/technetwork/java/javase/downloads/jdk-6u30-download-1377139.html , Select the jdk installation environment under LinuxX86: Ubuntu 11.10 32-bit, jdk-6u30-linux-i586.bin. 1. download JDK. Official http://www.oracle.com/technetwork/java/javase/downloads/jdk-6u30-download-1377139.html Select the jdk-6u30-linux-i586.bin under Linux X86, so that the direct use of Thunder download, fast, put on the local machine. 2. open the terminal of Ubuntu 11.10. Run the following command: Java code sudo cp jdk-6u30-linux-i586.bin/usr/lib/jvm cd/usr/lib/jvm sudo. /jdk-6u30-linux-i586.bin sudo mv jdk1.6.0 _ 30/java-1.6.0_30-sun/sudo ln-s java-1.6.0_30-sun java-6-sun sudo rm jdk-6u30-linux-i586.bin note: If there is no other version of JDK installed in the system, the JVM directory does not exist, you need to create it first. Java code sudo mkdir/usr/lib/jvm 3. set environment variables, including PATH, CLASSPATH, and JAVA_HOME, note the Java code 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. tell the system, we use sun's JDK instead of OpenJDK's Java code sudo update-alternatives -- install/usr/bin/java/usr /Lib/jvm/java-6-sun/bin/java 300 sudo update-alternatives -- install/usr/bin/javac/usr/lib/jvm/java-6-sun /bin/javac 300 sudo update-alternatives -- config java 5. select the path priority state Java code 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 input value: 2. press enter 6. Finally, let's verify the Java code zhunian @ Ubuntu :~ $ Java-version java version "1.6.0 _ 30" Java (TM) SE Runtime Environment (build 1.6.0 _ 30-b12) Java HotSpot (TM) Server VM (build between 5-b03, mixed mode) zhunian @ Ubuntu :~ $ Javac-version javac 1.6.0 _ 30 author znhyz1