Java environment variable configuration in linux

Java environment variable configuration in linux-general Linux technology-Linux programming and kernel information. For details, see the following. 1. Download JDK

Address: http://java.sun.com/javase/downloads/index.jsp

If Platform is selected for Linux, there are two options: Linux RPM in self-extracting file and Linux self-extracting file. I chose the second one.

2. Install JDK

Modify jdk permission to execute

# Chmod 755 jdk-6u6-linux-i586.bin

#./Jdk-6u6-linux-i586.bin

Follow the prompts to install the jdk1.6.0 _ 06 folder (

If you select the first rpm package, it will be installed in the/usr/java/directory by default.) You can copy it to your favorite directory, I put it under/usr/local.

3. Configure Environment Variables

This is the most critical step and must be configured with caution.

Edit/etc/profile

# Vi/etc/profile

Add the following lines:

JAVA_HOME =/usr/local/jdk1.6.0 _ 06

CLASSPATH =.: $ JAVA_HOME/lib/tools. jar: $ JAVA_HOME/jre/lib/rt. jar

PATH = $ JAVA_HOME/bin: $ PATH: $ HOME/bin: $ JAVA_HOME/jre/bin

Modify the export line and add: JAVA_HOME CLASSPATH.

Export JAVA_HOME CLASSPATH PATH USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC

During configuration, note that PATH = must be followed by: $ PATH. Otherwise, the PATH environment variable does not retain the original value, so that the Linux system cannot log on normally.

In addition, CLASSPATH =. The equal sign must be followed by a vertex. Otherwise, java. lang. ClassNotFoundException may occur.

4. Check Configuration

Log out of the environment to make the environment variable take effect (or execute the source/etc/profile command)

# Java

# Javac

# Java-version

If java and javac run, the java environment variable is successfully configured. Let's write a test file test. java.

# Vi test. java

Class test

{

Public static void main (String [] args)

{

System. out. println ("Hello World! ");

}

}

Save and exit. Compile and execute the command below;

[Root @ LinuxServer text] # javac test. java

[Root @ LinuxServer text] # javatest

Hello World!

Working properly, OK.