How can I install Java in Ubuntu via the console?
Question by Logan Ingram /

I am looking for a way to install Java in Ubuntu via the console. Can it be done, and if so how?

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Answers (5)
  • Beirapadua Greaser

    It can be done by adding ppa
    steps:

    1. open up terminal
    Enter the following commands:
    2. sudo add-apt-repository ppa:webupd8team/java
    3. sudo apt-get update
    4. sudo apt-get install oracle-java7-installer

    Wait for a bit,, and the installation is complete

    To check the version of java in use type the command:
    sudo java -version

    To choose default java for use:
    sudo update-alternatives –config java

  • Achraf Almouloudi

    Why not just download it from Java site.

  • Amit Sinha

    First check your system architecture by usnig this command “file /sbin/init ” in a terminal now check for java if already installed “java -version”
    If you have OpenJDK installed on your system it may look like this:
    java version “1.6.0_21″
    OpenJDK Runtime Environment (IcedTea6 1.10pre) (6b21~pre1-0lucid1)
    OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)
    If you have OpenJDK installed on your system, you have the wrong vendor version of Java installed.
    Completely remove the OpenJDK/JRE from your system and create a directory to hold your Oracle Java JDK/JRE binaries. This will prevent system conflicts and confusion between different vendor versions of Java. For example, if you have the OpenJDK/JRE installed on your system, you can remove it by typing the following at the command line:
    Type/Copy/Paste: sudo apt-get purge openjdk-\*
    This command will completely remove OpenJDK/JRE from your system
    Type/Copy/Paste: sudo mkdir -p /usr/local/java
    This command will create a directory to hold your Oracle Java JDK and JRE binaries.
    Download the Oracle Java JDK/JRE for Linux http://www.oracle.com/technetwork/java/javase/downloads/index.html
    Make sure you select the correct compressed binaries for your system architecture 32-bit or 64-bit (which end in tar.gz).
    For example, if you are on Ubuntu Linux 32-bit operating system download 32-bit Oracle Java binaries.
    For example, if you are on Ubuntu Linux 64-bit operating system download 64-bit Oracle Java binaries.
    Copy the Oracle Java binaries into the /usr/local/java directory. In most cases, the Oracle Java binaries are downloaded to: /home/”your_user_name”/Downloads.

    32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
    Type/Copy/Paste: cd /home/”your_user_name”/Downloads
    Type/Copy/Paste: sudo -s cp -r jdk-7u11-linux-i586.tar.gz /usr/local/java
    Type/Copy/Paste: sudo -s cp -r jre-7u11-linux-i586.tar.gz /usr/local/java
    Type/Copy/Paste: cd /usr/local/java
    64-bit Oracle Java on 64-bit Ubuntu Linux installation instructions:
    Type/Copy/Paste: cd /home/”your_user_name”/Downloads
    Type/Copy/Paste: sudo -s cp -r jdk-7u11-linux-x64.tar.gz /usr/local/java
    Type/Copy/Paste: sudo -s cp -r jre-7u11-linux-x64.tar.gz /usr/local/java
    Type/Copy/Paste: cd /usr/local/java
    Run the following commands on the downloaded Oracle Java tar.gz files. Make sure to do this as root in order to make them executable for all users on your system. To open a root terminal type sudo -s you will be prompted for your logon password.

    32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
    Type/Copy/Paste: sudo -s chmod a+x jdk-7u11-linux-i586.tar.gz
    Type/Copy/Paste: sudo -s chmod a+x jre-7u11-linux-i586.tar.gz
    64-bit Oracle Java on 64-bit Ubuntu Linux installation instructions:
    Type/Copy/Paste: sudo -s chmod a+x jdk-7u11-linux-x64.tar.gz
    Type/Copy/Paste: sudo -s chmod a+x jre-7u11-linux-x64.tar.gz
    Unpack the compressed Java binaries, in the directory /usr/local/java

    32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
    Type/Copy/Paste: sudo -s tar xvzf jdk-7u11-linux-i586.tar.gz
    Type/Copy/Paste: sudo -s tar xvzf jre-7u11-linux-i586.tar.gz
    64-bit Oracle Java on 64-bit Ubuntu Linux installation instructions:
    Type/Copy/Paste: sudo -s tar xvzf jdk-7u11-linux-x64.tar.gz
    Type/Copy/Paste: sudo -s tar xvzf jre-7u11-linux-x64.tar.gz
    Double-check your directories. At this point, you should have two uncompressed binary directories in /usr/local/java for the Java JDK/JRE listed as:

    Type/Copy/Paste: ls -a
    jdk1.7.0_11
    jre1.7.0_11
    Edit the system PATH file /etc/profile and add the following system variables to your system path. Use nano, gedit or any other text editor, as root, open up /etc/profile.

    Type/Copy/Paste: sudo gedit /etc/profile
    or
    Type/Copy/Paste: sudo nano /etc/profile
    Scroll down to the end of the file using your arrow keys and add the following lines below to the end of your /etc/profile file:

    Type/Copy/Paste:
    JAVA_HOME=/usr/local/java/jdk1.7.0_11
    PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
    JRE_HOME=/usr/local/java/jre1.7.0_11
    PATH=$PATH:$HOME/bin:$JRE_HOME/bin
    export JAVA_HOME
    export JRE_HOME
    export PATH
    Save the /etc/profile file and exit.
    Inform your Ubuntu Linux system where your Oracle Java JDK/JRE is located. This will tell the system that the new Oracle Java version is available for use.
    Type/Copy/Paste: sudo update-alternatives –install “/usr/bin/java” “java” “/usr/local/java/jre1.7.0_11/bin/java” 1
    this command notifies the system that Oracle Java JRE is available for use
    Type/Copy/Paste: sudo update-alternatives –install “/usr/bin/javac” “javac” “/usr/local/java/jdk1.7.0_11/bin/javac” 1
    this command notifies the system that Oracle Java JDK is available for use
    Type/Copy/Paste: sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/local/java/jre1.7.0_11/bin/javaws” 1
    this command notifies the system that Oracle Java Web start is available for use
    Inform your Ubuntu Linux system that Oracle Java JDK/JRE must be the default Java.

    Type/Copy/Paste: sudo update-alternatives –set java /usr/local/java/jre1.7.0_11/bin/java
    this command will set the java runtime environment for the system
    Type/Copy/Paste: sudo update-alternatives –set javac /usr/local/java/jdk1.7.0_11/bin/javac
    this command will set the javac compiler for the system
    Type/Copy/Paste: sudo update-alternatives –set javaws /usr/local/java/jre1.7.0_11/bin/javaws
    this command will set Java Web start for the system
    Reload your system wide PATH /etc/profile by typing the following command:
    Type/Copy/Paste: . /etc/profile
    Note your system-wide PATH /etc/profile file will reload after reboot of your Ubuntu Linux system

    Test to see if Oracle Java was installed correctly on your system. Run the following commands and note the version of Java:
    A successful installation of 32-bit Oracle Java will display:
    Type/Copy/Paste: java -version
    This command displays the version of java running on your system
    You should receive a message which displays:
    java version “1.7.0_11″
    Java(TM) SE Runtime Environment (build 1.7.0_11-b21)
    Java HotSpot(TM) Server VM (build 23.1-b03, mixed mode)
    Type/Copy/Paste: javac -version
    This command lets you know that you are now able to compile Java programs from the terminal.
    You should receive a message which displays:
    javac 1.7.0_11
    A successful installation of Oracle Java 64-bit will display:
    Type/Copy/Paste: java -version
    This command displays the version of java running on your system
    You should receive a message which displays:
    java version “1.7.0_11″
    Java(TM) SE Runtime Environment (build 1.7.0_11-b21)
    Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode)
    Type/Copy/Paste: javac -version
    This command lets you know that you are now able to compile Java programs from the terminal.
    You should receive a message which displays:
    javac 1.7.0_11

    Congratulations, you just installed Oracle Java on your Linux system

  • susendeep dutta

    Visit the link below to know how to do it –

    http://www.wikihow.com/Install-Oracle-Java-on-Ubuntu-Linux