Set overall java environment variables in Linux

In Linux, java overall environment variable settings-general Linux technology-Linux programming and kernel information, the following is a detailed description. Install JDK first. You may download the binfile from the sun official website or through the new gains. After installation, you can directly run java-version to test whether the installation is successful .. now you can set the environment variable and edit the file:

Sudo gedit/etc/profile

Append at the end of the file:

Export JAVA_HOME =/usr/java/jdk1.5.0 _ 10/

# Note: append the bin directory of the newly added JDK to the beginning of $ PATH. In this way, when multiple JDK versions are installed in the system, the program will first search for the JDK version at the beginning.

Export PATH = $ JAVA_HOME/bin: $ PATH
Export CLASSPATH =.: $ JAVA_HOME/lib/tools. jar: $ JAVA_HOME/lib/dt. jar: $ CLASSPATH

After saving/etc/profile, do not forget to execute the following command to make changes to environment variables take effect immediately.

Source/etc/profile

If an error is reported when you run the preceding command, check whether the text you added in/etc/profile is incorrect.

Finally, check whether the environment variable changes take effect.