CentOS Setup the new Java binary as default using alternatives:
2014-09-03 09:09
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今天用CentOS安装JDK,发觉在安装完成后,输入java命令来验证是否安装成功时,出现
Usage: gij [OPTION] ... CLASS [ARGS] ...
to invoke CLASS.main, or
gij -jar [OPTION] ... JARFILE [ARGS] ...
to execute a jar file
Try `gij --help' for more information.
感觉很奇怪,怎么出现gij了呢,在网上搜索错误出现原因,原来是因为linux系统默认指向的不是刚刚安装的jdk版本,于是乎,查看下
[root@localhost ~]# which java
/usr/bin/java
[root@localhost ~]# ls /usr/bin/java -l
lrwxrwxrwx. 1 root root 22 9月 26 11:37 /usr/bin/java -> /etc/alternatives/java
[root@localhost ~]# ll /etc/alternatives/java
lrwxrwxrwx. 1 root root 35 9月 26 11:37 /etc/alternatives/java -> /usr/lib/jvm/jre-1.5.0-gcj/bin/java
[root@localhost ~]# java -version
java version "1.5.0"
gij (GNU libgcj) version 4.4.7 20120313 (Red Hat 4.4.7-3)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
OK,我们看到红色字体的确指向的不是我刚刚自己安装的jdk,索引需要引入使用alternatives工具修改:
[root@localhost ~]#
alternatives --install /usr/bin/java java /usr/java/jdk1.7.0_25/bin/java 300
再次输入java -version命令来验证,发现依然没有变化,OK,还有一步重要的操作:
[root@localhost ~]#
alternatives --config java
共有 2 个程序提供“java”。
选择 命令
-----------------------------------------------
*+ 1 /usr/lib/jvm/jre-1.5.0-gcj/bin/java
2 /usr/java/jdk1.7.0_25/bin/java
按 Enter 来保存当前选择[+],或键入选择号码:2
OK,所有的修改已经完成,接下来让我们输入java命令,看到我们想要的结果了,问题解决。
Usage: gij [OPTION] ... CLASS [ARGS] ...
to invoke CLASS.main, or
gij -jar [OPTION] ... JARFILE [ARGS] ...
to execute a jar file
Try `gij --help' for more information.
感觉很奇怪,怎么出现gij了呢,在网上搜索错误出现原因,原来是因为linux系统默认指向的不是刚刚安装的jdk版本,于是乎,查看下
[root@localhost ~]# which java
/usr/bin/java
[root@localhost ~]# ls /usr/bin/java -l
lrwxrwxrwx. 1 root root 22 9月 26 11:37 /usr/bin/java -> /etc/alternatives/java
[root@localhost ~]# ll /etc/alternatives/java
lrwxrwxrwx. 1 root root 35 9月 26 11:37 /etc/alternatives/java -> /usr/lib/jvm/jre-1.5.0-gcj/bin/java
[root@localhost ~]# java -version
java version "1.5.0"
gij (GNU libgcj) version 4.4.7 20120313 (Red Hat 4.4.7-3)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
OK,我们看到红色字体的确指向的不是我刚刚自己安装的jdk,索引需要引入使用alternatives工具修改:
[root@localhost ~]#
alternatives --install /usr/bin/java java /usr/java/jdk1.7.0_25/bin/java 300
再次输入java -version命令来验证,发现依然没有变化,OK,还有一步重要的操作:
[root@localhost ~]#
alternatives --config java
共有 2 个程序提供“java”。
选择 命令
-----------------------------------------------
*+ 1 /usr/lib/jvm/jre-1.5.0-gcj/bin/java
2 /usr/java/jdk1.7.0_25/bin/java
按 Enter 来保存当前选择[+],或键入选择号码:2
OK,所有的修改已经完成,接下来让我们输入java命令,看到我们想要的结果了,问题解决。
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