Install JDK in Linux

Step 1: Download JDK

Go to Oracle official website to download jdk-6u45-linux-i586.bin

Http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html

Step 2. Unzip and install

Chmod 755 jdk-6u43-linux-i586.bin
./Jdk-6u43-linux-i586.bin(Note that this step must be in the jdk-6u11-linux-i586.bin directory) Self-extract

Put the extracted files in the directory you want to install (I am/usr/lib/JVM/Java and put jdk1.6.0 _ 45)

Step 3: Modify Environment Variables

Gedit/etc/environment

Modify (ADD ):

[Java]
View plaincopyprint?

1. Path = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/Games"
2. Java_home =/usr/lib/JVM/Java/jdk1.6.0 _ 45
   
3. Jre_home =$ {java_home}/JRE
4. Classpath =. :$ {java_home}/lib: $ {jre_home}/lib

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"JAVA_HOME=/usr/lib/jvm/java/jdk1.6.0_43JRE_HOME=${JAVA_HOME}/jre  CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib  

Then reload. bashrc

[Java]
View plaincopyprint?

1. Source ~ /. Bashrc

 source ~/.bashrc  

Step 4: Modify the default configuration items

[Java]
View plaincopyprint?

1. Sudo Update-alternatives -- install/usr/bin/Java/usr/lib/JVM/Java/jdk1.6.0 _ 45/bin/Java 300
2. Sudo Update-alternatives -- install/usr/bin/javac/usr/lib/JVM/Java/jdk1.6.0 _ 45/bin/javac 300
3. Sudo Update-alternatives -- install/usr/bin/Jar/usr/lib/JVM/Java/jdk1.6.0 _ 45/bin/jar 300
4. Sudo Update-alternatives -- install/usr/bin/javah/usr/lib/JVM/Java/jdk1.6.0 _ 45/bin/javah 300
5. Sudo Update-alternatives -- install/usr/bin/javap/usr/lib/JVM/Java/jdk1.6.0 _ 45/bin/javap 300

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java/jdk1.6.0_43/bin/java 300sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java/jdk1.6.0_43/bin/javac 300sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/java/jdk1.6.0_43/bin/jar 300sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/java/jdk1.6.0_43/bin/javah 300sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/java/jdk1.6.0_43/bin/javap 300

-- If this parameter is not added, openjava is used to detect it in Java-version.

Sudo Update-alternatives -- config Java

Step 5: Test

[Java]
View plaincopyprint?

1. Without @ without-PC :~ /Downloads $ Java-version
2. Java version "1.6.0 _ 45"
3. Java (TM) se Runtime Environment (build 1.6.0 _ 45-b01)
4. Java hotspot (TM) server VM (build between 14-b01, mixed mode)
   

Http://blog.csdn.net/without0815/article/details/8686755