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Posts tagged with "java"

linux下设置java环境变量

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java安装了,可是使用的时候提示找不到JAVA_HOME或JRE_HOME。原因是java的路径没有设置,用下面的方法可以搞定。

UBUNTU下JAVA路径设置为例:

user environment vars settings comes from a different file which is /etc/bash.bashrc. You will have to put these lines at the bottom of bash.bashrc:

JAVA_HOME="PATH_TO _YOUR_JAVA_INSTALLATION"
export JAVA_HOME

now all you need to do is logout and login again.

如果找不到jre或java的路径就用以前说过的命令:update-alternatives --config java吧。不过注意只要取其中的一段。



Linux下如何选择java虚拟机

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嗯,今天又学了一招:可以用update-alternatives --config java来完成,如下面是在我的linux box里面运行的情况。

lrd@ubuntu-lrd:~$ update-alternatives --config java

There are 4 alternatives which provide `java'.

Selection Alternative
-----------------------------------------------
1 /usr/bin/gij-wrapper-4.0
+ 2 /usr/lib/jvm/java-gcj/bin/java
3 /usr/lib/j2re1.5-sun/bin/java
* 4 /usr/lib/j2sdk1.5-sun/bin/java

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