下载OpenSUSE下安装JDK

OpenSUSE下安装JDKlinux教程http://ww w.linuxprob e.c o m/openSUSE自带了OpenJDK安装Oracle JDK后需要使用alternatives切换系统默认使用的JDK版本。

1安装JDKlinuxidc@linux-linuxidc:~/下载> sudo zypper install jdk-8u66-linux-x64 .rpm -y

. . .

/var/tmp/rpm-tmp.DfGrcZ: line 638 : /usr/sbin/alternatives: No suchfile or directory

/var/tmp/rpm-tmp.DfGrcZ: line 650: /usr/sbin/alternatives: No suchfile or directorywarning: %post(jdk1. 8.0_66-2000:1.8 .0_66-fcs.x86_64) scriptletfailed, exit status 127

有如上的报错 “/usr/sbin/alternatives”这个文件找不到。openSUSE相应的文件名是update-alternatives尝试做了软连接会报新的错误update-alternatives: error: alternative javaws can't be slave ofjava: it is a slave of javapluginupdate-alternatives: error: alternative javaws can't be slave ofjavac: it is a slave of javapluginwarning: %post(jdk1. 8.0_66-2000:1.8 .0_66-fcs.x86_64) scriptletfailed, exit status 2

看来openSUSE和Oracle JDK不是很友好啊需要手动完成后续的必要步骤从网上找的可能不是安装脚本的全部后续操作 。

2用alternatives声明jdk版本并设为默认linuxidc@linux-linuxidc:~/下载> sudo /usr/sbin/update-alternatives --install "/usr/bin/java" "java" "/usr/java/jdk1.8 .0_66/bin/java" 40linuxidc@linux-linuxidc:~/下载> sudo /usr/sbin/update-alternatives --install "/usr/lib64/browser-plugins/javaplugin.so" "javaplugin""/usr/java/jdk1. 8.0_66/jre/lib/amd64/libnpjp2.so" 40

--其中红色部分根据操作系统及指令集不同会有不同。linuxidc@linux-linuxidc:~/下载> sudo /usr/sbin/update-alternatives --config java

There are 3 choices for the alternative java (providing

/usr/bin/java) .

Selection Path Priority Status

------------------------------------------------------------

* 0 /usr/lib64/jvm/jre-1. 8.0-openjdk/bin/java 18040 automode

1. /usr/java/jdk1.8 .0_66/bin/java 40 manual mode

2. /usr/lib64/jvm/jre-1.7.0-openjdk/bin/java 17147 manual mode

3. /usr/lib64/jvm/jre-1.8.0-openjdk/bin/java 18040 manual modePress enter to keep the current choice[*] , or type selection number:

1update-alternatives: using /usr/java/jdk1.8 .0_66/bin/java to provide/usr/bin/java (java) in manual modelinuxidc@linux-linuxidc:~/下载> sudo /usr/sbin/update-alternatives --config javaplugin

There are 3 choices for the alternative javaplugin (providing/usr/lib64/browser-plugins/javaplugin.so) .

Selection Path Priority Status

------------------------------------------------------------

* 0 /usr/lib64/java-1_8_0-openjdk-plugin/lib/IcedTeaPlugin.so

18020 auto mode

1. /usr/java/jdk1.8 .0_66/jre/lib/amd64/libnpjp2.so 40manual mode

2. /usr/lib64/java-1_7_0-openjdk-plugin/lib/IcedTeaPlugin.so 17147manual mode

3. /usr/lib64/java-1_8_0-openjdk-plugin/lib/IcedTeaPlugin.so 18020manual mode

Press enter to keep the current choice[*] , or type selection number:

1update-alternatives: using

/usr/java/jdk1.8 .0_66/jre/lib/amd64/libnpjp2.so to provide

/usr/lib64/browser-plugins/javaplugin.so (javaplugin) in manual mode

3查看JDK版本linuxidc@linux-linuxidc:~/下载> java -versionjava version "1. 8.0_66"

4修改JAVA_HOME:

但是此时JAVA_H O ME尚不正确

linuxidc@linux-linuxidc:~/下载> echo $JAVA_HOME

修改/etc/profile文件在文件尾追加export JAVA_HOME=/usr/j ava/j dk1.8 .0_66export JRE_HOME=$JAVA_HOME/j reexport CLAS SPATH=. :$JAVA_HOME/lib:$JRE_HOME/l ib:$CLAS SPATHexport PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

退出重新登陆后linuxidc@linux-linuxidc:~> echo $JAVA_HOME

DONE

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