[[email protected] wj]# rpm -qa | grep java

tzdata-java-2013g-1.el6.noarch

java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.el6.i686        //可以看到當前系統已經安裝了

java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.i686

[[email protected] wj]# yum remove -y java-1.6.0

[[email protected] wj]# yum remove -y java-1.7.0

[[email protected] wj]# rpm -qa | grep java       //

tzdata-java-2013g-1.el6.noarch

[[email protected] src]# cp /media/sf_data/jdk-10.0.2_linux-x64_bin.tar /usr/local/src/jdk.tar

[[email protected] src]# tar -xvf jdk.tar

[[email protected] src]# gedit /etc/profile

#java environment

export JAVAHOME=/usr/local/src/jdk-10.0.2       //這個路徑就是jdk解壓的路徑

export CLASSPATH=.:${JAVAHOME}/jre/lib/rt.jar:${JAVAHOME}/lib/dt.jar:${JAVAHOME}/lib/tools.jar

export PATH=$PATH:${JAVAHOME}/bin

[[email protected] src]# source /etc/profile

[[email protected] src]# java -version

java version "1.8.0_181"

Java(TM) SE Runtime Environment (build 1.8.0_181-b13)

Java HotSpot(TM) Client VM (build 25.181-b13, mixed mode)

[[email protected] src]#