Install JDK, Eclipse, and AndroidSDK in Ubuntu

1. Install jdk first

1. Install jdk

First, go to ghost. My user name is cjw, so the full directory is/home/cjw/java right-click and open it with the archive manager, and then decompress the content to the java folder,

Next, configure the environment variable.

Enter sudo gedit/etc/environment in the terminal and press Enter. A password is required, and a file is opened. Enter the following three lines in the file:

Export JAVA_HOME =/home/cjw/java/jdk1.7.0

Export JRE_HOME =/home/cjw/java/jdk1.7.0/jre

Export CLASSPATH =.: $ CLASSPATH: $ JAVA_HOME/lib: $ JAVA_HOME/jre/lib