Install and configure JavaSDK in Ubuntu

Install java under Ubuntu: Open the terminal under Ubuntu, run the following command, or use Adept/the new software manager to search for "sun-java6-jre" and "sun-java6-jdk" and tag the installation. Sudoapt-getinstallsun-java6-jre if the space is rich, it is recommended to install a JDK. Sudoapt-getinstallsun-java6-jdk tip:

• Install java in Ubuntu:

Open the terminal under Ubuntu, run the following command, or use Adept/the new software manager to search for "sun-java6-jre" and "sun-java6-jdk" and tag the installation.

sudo apt-get install sun-java6-jre

If the space is rich, we recommend that you install a JDK.

sudo apt-get install sun-java6-jdk

Tip: During the installation process, you need to answer whether you agree to use the Protocol (the red-blue prompt page in the terminal). Press the tab key to OK, and press enter to install it normally.

• Set the current default java interpreter and compiler:(Skip this step if multiple Java virtual machines are not installed in ubuntu9.10 .)

sudo update-alternatives --config java

The following figure is displayed after execution:

There are 2 alternatives which provide `java'.Selection Alternative-----------------------------------------------   # /usr/bin/gij-wrapper-4.1  *+ 2 /usr/lib/jvm/java-6-sun/jre/bin/javaPress enter to keep the default[*], or type selection number:

Enter the number before the row containing "sun. As shown above, enter 2 and press enter to confirm.

sudo update-alternatives --config javac

The operation is similar to the previous one.

• Configure JAVA environment variables:

sudo gedit /etc/environment

Add the following two lines:

JAVA_HOME=/usr/lib/jvm/java-6-sunCLASSPATH=.:/usr/lib/jvm/java-6-sun/lib

To make the configuration take effect, you must restart the machine or enter

. /etc/environment

• Configure the JVM priority:(Skip this step if multiple Java virtual machines are not installed in ubuntu9.10 .)

sudo gedit /etc/jvm

Convert

/usr/lib/jvm/java-6-sun

Enter this line at the top of the configuration block.

• Install the browser's JAVA Plugin (recommended ):

sudo apt-get install sun-java6-plugin

• Chinese font setting: If the font of the text tripod works, but spaces may appear, you can edit it.

/usr/lib/jvm/java-6-sun/jre/lib/fonts/fonts.dir

Add # To comment out all fonts before all Lucida. If you use a Custom font, create a link to/usr/lib/jvm/java-6-sun/jre/lib/fonts/fallback