Installing JDK under Linux

1) Use uname-a to see that the machine is in the first place.

2) JDK official network http://www.oracle.com/technetwork/java/javase/downloads/index.html Download

3) Unzip the installation

We install the JDK to this path:/USR/LIB/JVM

If there is no such directory (the first time of course not), we will create a new directory

Cd/usr/lib

mkdir JVM

Then unzip the compressed package that you just downloaded

Tar zxvf./jdk-7-linux-i586.tar.gz-c/USR/LIB/JVM

Cd/usr/lib/jvm

MV Jdk1.7.0_05/jdk7

4) Configure Environment variables

Vi/etc/profile

Add the following lines at the end:

Export JAVA_HOME=/USR/LIB/JVM/JDK7

Export JRE_HOME=${JAVA_HOME}/JRE

Export Classpath=.:${java_home}/lib:${jre_home}/lib

Export Path=${java_home}/bin: $PATH

Source/etc/profile effective after execution

5) test JDK

#vi Hello.java

public class Hello {

public static void Main (String args [])

{

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

}

}

# Javac Hello.java

# java Hello

Installing JDK under Linux