Installing jdk-8u20-linux-x64 in centos-6.4-x86_64

Software version: jdk-8u20-linux-x64.rpm

：

Http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

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(1), find the package of OPENJDK

[Email protected] ~]# Rpm-qa | grep Javajava-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.x86_64tzdata-java-2012j-1.el6.noarchjava_ Cup-0.10k-5.el6.x86_64java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_ 64gcc-java-4.4.7-3.el6.x86_64

(2), check the version of OPENJDK

[Email protected] ~]# Java-versionjava version "1.7.0_09-icedtea" OpenJDK Runtime Environment (rhel-2.3.4.1.el6_3-x86_ OpenJDK 64-bit Server VM (build 23.2-b09, Mixed mode) [[email protected] ~]#

(3), uninstall OPENJDK

[Email protected] ~]# rpm-e--nodeps java-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.x86_64[[email protected] ~]# rpm-e- -nodeps Tzdata-java-2012j-1.el6.noarch[[email protected] ~]# rpm-e--nodeps java_cup-0.10k-5.el6.x86_64[[email Protected] ~]# rpm-e--nodeps java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64[[email protected] ~]# rpm-e--nodeps java -1.5.0-gcj-1.5.0.0-29.1.el6.x86_64[[email protected] ~]# rpm-e--nodeps gcc-java-4.4.7-3.el6.x86_64

(4), installation jdk-8u20-linux-x64.rpm

[Email protected] downloads]# RPM-IVH jdk-8u20-linux-x64.rpm Preparing ... ###############################        ############ [100%] 1:jdk1.8.0_20 ########################################### [100%]unpacking JAR files ... Rt.jar ... jsse.jar ... charsets.jar ... tools.jar localedata.jar ... jfxrt.jar...[-... [Email protected] downloads]#

(5), configure environment variables

[email protected] jdk1.8.0_20]# cat << EOF >>/etc/profile> java_home=/usr/java/jdk1.8.0_20> jre_ Home=/usr/java/jdk1.8.0_20/jre> path= $PATH: $JAVA _home/bin: $JRE _home/bin> classpath=.: $JAVA _home/lib/dt.jar : $JAVA _home/lib/tools.jar: $JRE _home/lib> export java_home jre_home PATH classpath> eof[[email protected] jdk1.8.0_20]#

Make the environment variable effective immediately:

[Email protected] jdk1.8.0_20]# Source/etc/profile

(6), test the installation is successful

[[email protected] jdk1.8.0_20]# java[[email protected] jdk1.8.0_20]# Java-version[[email protected] jdk1.8.0_20]# Javac

Details are as follows:

[[Email protected] jdk1.8.0_20]# java

Usage:java [-options] class [args ...]

(to execute a class)

or Java [-options]-jar jarfile [args ...]

(To execute a jar file)

Where options include:

-d32 use a 32-bit data model if available

-d64 use a 64-bit data model if available

-server to select the "Server" VM

The default VM is server.

-CP <class Search Path of directories and Zip/jar files>

-classpath <class Search Path of directories and Zip/jar files>

a:separated List of directories, JAR archives,

and ZIP archives to search for class files.

-d<name>=<value>

Set a system property

-VERBOSE:[CLASS|GC|JNI]

Enable verbose output

-version Print product version and exit

-version:<value>

Require the specified version to run

-showversion Print product version and continue

-jre-restrict-search | -no-jre-restrict-search

Include/exclude user Private JREs in the version search

-? -help Print this Help message

-X Print Help on non-standard options

-ea[:<packagename>...|:<classname>]

-enableassertions[:<packagename>...|:<classname>]

Enable assertions with specified granularity

-da[:<packagename>...|:<classname>]

-disableassertions[:<packagename>...|:<classname>]

Disable assertions with specified granularity

-esa | -enablesystemassertions

Enable System assertions

-DSA | -disablesystemassertions

Disable System assertions

-agentlib:<libname>[=<options>]

Load native Agent library <libname>, e.g.-agentlib:hprof

See Also,-agentlib:jdwp=help and-agentlib:hprof=help

-agentpath:<pathname>[=<options>]

Load native Agent library by full pathname

-javaagent:<jarpath>[=<options>]

Load Java programming language agent, see Java.lang.instrument

-splash:<imagepath>

Show splash screen with specified image

See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.

[Email protected] jdk1.8.0_20]# java-version

Java Version "1.8.0_20"

Java (TM) SE Runtime Environment (build 1.8.0_20-b26)

Java HotSpot (TM) 64-bit Server VM (build 25.20-b23, Mixed mode)

[Email protected] jdk1.8.0_20]# Javac

Usage:javac <options> <source files>

Where possible options include:

-G Generate All debugging Info

-g:none Generate No debugging Info

-g:{lines,vars,source} Generate only some debugging info

-nowarn Generate No warnings

-verbose Output messages about what the compiler is doing

-deprecation Output source locations where deprecated APIs are used

-classpath <path> specify where to find user class files and annotation processors

-CP <path> specify where to find user class files and annotation processors

-sourcepath <path> specify where to find input source files

-bootclasspath <path> Override Location of bootstrap class files

-extdirs <dirs> Override location of installed extensions

-endorseddirs <dirs> Override location of endorsed standards path

-proc:{none,only} Control whether annotation processing and/or compilation is done.

-processor <class1>[,<class2>,<class3> ...] Names of the annotation processors to run; Bypasses default discovery process

-processorpath <path> specify where to find annotation processors

-parameters Generate metadata for reflection on method parameters

-D <directory> specify where to place generated class files

-S <directory> specify where to place generated source files

-h <directory> specify where to place generated native header files

-implicit:{none,class} Specify whether or not to generate class files for implicitly referenced files

-encoding <encoding> Specify character encoding used by source files

-source <release> provide source compatibility with specified release

-target <release> Generate class files for specific VM version

-profile <profile> Check that API used are available in the specified profile

-version Version Information

-help Print A synopsis of standard options

-akey[=value] Options to pass to annotation processors

-X Print A synopsis of nonstandard options

-j<flag> Pass <flag> directly to the runtime system

-werror Terminate Compilation If warnings occur

@<filename> Read options and filenames from file

This article is from "Jerry" blog, please make sure to keep this source http://alipay.blog.51cto.com/7119970/1560188

Installing jdk-8u20-linux-x64 in centos-6.4-x86_64