====== Installation Oracle JDK ====== 1. Download the latest jdk from http://www.oracle.com/technetwork/java/javase/downloads/index.html 2. Unpack to /usr/lib/jvm 3. Create symbolic link ''java-current'': ln -s /usr/lib/jvm/jdk1.7.0_11 /usr/lib/jvm/java-current 4. Add to ''.bashrc'': export JAVA_HOME=/usr/lib/jvm/java-current export PATH=$PATH:$JAVA_HOME/bin 5. Delete links to old java versions: mv usr/lib/jvm usr/lib/jvm1 cd /usr/bin - delete all broken links cd /etc/alternatives - delete all broken links mv usr/lib/jvm1 usr/lib/jvm 6. Add global link to java: rm /usr/bin/java ln -s /usr/lib/jvm/java-current/bin/java /usr/bin/java ===== Installing Sun JDK under Ubuntu 10.4 steps: ===== - Open the Application Center. - Main menu / Application sources - Page - Other Software - Check - "http://archive.canonical.com/ubuntu lucid patner" - Close - Go to the Application Center main window page Patners Canonical, use search field for "jdk". ===== Installing Java 7 on Ubuntu ===== * Dowload an appropriate distro from http://www.oracle.com/technetwork/java/javase/downloads/index.html * Unpack it to /usr/lib/jvm and rename to java-7-sun-1.7.0 (or whatever number it is) * Make symbolic link to the directory: ln -s java-7-sun-1.7.0 java-7-sun * Get the last number in the list: sudo update-alternatives --config java * Add new jdk to the list: sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-7-sun/jre/bin/java 3 * Choose new jdk by typing it's number: sudo update-alternatives --config java * Check version: java -version ===== How to make Sun JVM default Java Machine: ===== A. We have to replace symlink /etc/alternatives/java. - Delete current OpenJDK symlink - Using Midnight Commander open directory /etc/alternatives/ from one side - and pose cursor on file /usr/lib/jvm/java-6-sun/jre/bin/java - Make symlink: Ctrl+x, s. or: B. More elegant way: sudo update-alternatives --config java and select the option that has the path **/usr/lib/jvm/java-6-sun/jre/bin/java**