Install JDK1.6 in CentOS

1,Software

A) download jdk address, this document sample jdk for jdk-6u32-linux-x64.bin,: http://download.oracle.com/otn-pub/java/jdk/6u32-b05/jdk-6u32-linux-x64.bin

B) unless otherwise stated, this document serves as the root user.

2,Install

A)Extract

1 # sh jdk-6u32-linux-x64.bin

 

B)Copy

1 # cp –r jdk1.6.0_32 /usr/java

 

C)Check whether decompression is successful

1 # cd /usr/java2 3 # ./bin/java -version

 

Java version "1.6.0 _ 32"

Java (TM) SE Runtime Environment (build 1.6.0 _ 32-b03)

Java HotSpot (TM) Client VM (build 11.3-b02, mixed mode)

1 # java -version

 

Java version "1.4.2"

Gij (GNU libgcj) version 4.1.2 20070626 (Red Hat 4.1.2-14)

Copyright (C) 2006 Free Software Foundation, Inc.

DescriptionJavaVersion is1.4, NewJavaVersion is1.6So you need to change the environment variable and replace the built-inJava

D)Set Environment Variables

1 # vi /etc/profile

 

Edit box appears,In"HISTSIZE = 1000"Path for adding Environment Variables:

1 JAVA_HOME=/usr/java3 PATH=$PATH:$JAVA_HOME/bin5 CLASSPATH=.:$JAVA_HOME/lib7 JRE_HOME=$JAVA_HOME/jre

 

In"Export path user logname mail hostname histsize inputrc"Add the following:

1 export JAVA_HOME PATH CLASSPATH JRE_HOME

 

PressEscExit edit box,Then press"Shift +;",InputWq (WriteSave and exit)

1 # source /etc/profile 

 

Make environment variables take effect

E)Set javaAnd javacSymbol connection

This is the defaultJdk (The default value isJDK1.4)Changed to newly installedJdk1.6

1 #cd /usr/bin 3 #ln -s -f /usr/java/jre/bin/java5 #ln -s -f /usr/java/bin/javac

 

F)Restart the system (Or exit and log on again)To make environment variables take effect

1 # reboot

 

G)Check Environment Variables

1 # echo $JAVA_HOME

 

/Usr/java

1 # echo $PATH

 

/Usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin: /usr/bin: // usr/java/bin:/root/bin

1 # echo $CLASSPATH

 

.:/Usr/java/lib

H)Check whether the installation and configuration are successful

1 # java -version

 

Java version "1.6.0 _ 32"

Java (TM) SE Runtime Environment (build 1.6.0 _ 32-b03)

Java HotSpot (TM) Client VM (build 11.3-b02, mixed mode)