首先先检查linux机器上是否有自带的jdk java -version检查下就可以,如果有版本低的话可以先卸载掉方法如下 [root@localhost java]# rpm -qa|grep gcj 或者 rpm -qa|grep java 如果没有信息就是没有安装、如果有那么如下操作 [root@localhost jdk-6u13-linux-i586]# yum -y remove java-1.4.2-gcj-compat-1.4.2.0-40jpp.115 或者 rpm -e --nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115Loaded plugins: rhnplugin, security This system is not registered with RHN. RHN support will be disabled. Setting up Remove Process Resolving Dependencies --> Running transaction check ---> Package java-1.4.2-gcj-compat.i386 0:1.4.2.0-40jpp.115 set to be erased --> Processing Dependency: java-gcj-compat for package: antlr --> Processing Dependency: java-gcj-compat for package: antlr --> Processing Dependency: java-gcj-compat >= 1.0.64 for package: gjdoc --> Processing Dependency: java-gcj-compat >= 1.0.64 for package: gjdoc --> Running transaction check ---> Package antlr.i386 0:2.7.6-4jpp.2 set to be erased ---> Package gjdoc.i386 0:0.7.7-12.el5 set to be erased --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Removing: java-1.4.2-gcj-compat i386 1.4.2.0-40jpp.115 installed 441 Removing for dependencies: antlr i386 2.7.6-4jpp.2 installed 2.5 M gjdoc i386 0.7.7-12.el5 installed 1.7 M Transaction Summary ================================================================================ Install 0 Package(s) Update 0 Package(s) Remove 3 Package(s) Downloading Packages: Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Erasing : antlr [1/3] Erasing : gjdoc [2/3] Erasing : java-1.4.2-gcj-compat [3/3] Removed: java-1.4.2-gcj-compat.i386 0:1.4.2.0-40jpp.115 Dependency Removed: antlr.i386 0:2.7.6-4jpp.2 gjdoc.i386 0:0.7.7-12.el5 Complete!(看到这个说明完成了。。)
接着我们手动安装linux的jdk我的 下载地址 http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html我下载的是rpm包 接着执行安装 [root@localhost local]#
rpm -ivh jdk-7-linux-i586.rpm
接着是配置环境变量 #vi /etc/profile java version "1.7.0" Java(TM) SE Runtime Environment (build 1.7.0-b147) Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode, sharing) [root@localhost jdk1.7.0]# echo $JAVA_HOME /usr/java/jdk1.7.0 这个时候就大功告成了
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