CentOS7卸载OpenJDK安装Oracle JDK

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CentOS7卸载OpenJDK安装Oracle JDK

1.查看JDK安装版本

[root@localhost ~]#java -versionjava version *1.7.0_51*OpenJDK Runtime Environment ( rhel-2.4.5.5.el7-x86_64 u51-b31)OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)

2.查找OpenJDK安装包

rpm -qa | grep openjdkjava-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64

3.卸载OpenJDK安装包

[root@localhost ~]#yum -y remove java-1.7.0-openjdk-headless.x86_64[root@localhost ~]#yum -y remove java-1.7.0-openjdk.x86_64

4.下载JDK1.7安装包（jdk-7u65-linux-x64.rpm）
5.安装JDK1.7

[root@localhost 下载]#yum install jdk-7u65-linux-x64.rpm

6.配置环境变量

[root@localhost ~]#vim /etc/profile

在文件末尾添加如下内容

JAVA_HOME=/usr/java/jdk1.7.0_65PATH=$JAVA_HOME/bin:$PATHCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport JAVA_HOMEexport PATHexport CLASSPATH

[root@localhost ~]#source /etc/profile

7.查看安装结果

[root@localhost ~]#java -versionjava version "1.7.0_65"Java(TM) SE Runtime Environment (build 1.7.0_65-b17)Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04.mixed mode)

至此已经完成了JDK1.7的安装

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