在 Linux 上找不到 Java 命令
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Java command not found on Linux
提问by J?cob
In Oracle Enterprise Linux when I type javaI am getting
在 Oracle Enterprise Linux 中，当我键入时，java我得到
bash: java: command not found
I have installed Java 1.6 and I have the following
我已经安装了 Java 1.6 并且我有以下内容
sudo update-alternatives --config java
There are 2 programs which provide 'java'.
Selection Command
-----------------------------------------------
* 1 /usr/lib/jvm/jre-1.4.2-gcj/bin/java
+ 2 /usr/java/jre1.6.0_24/bin/java
How can I resolve this issue?
我该如何解决这个问题？
Thanks
谢谢
采纳答案by 18bytes
You can add one of the Java path to PATH variable using the following command.
您可以使用以下命令将 Java 路径之一添加到 PATH 变量。
export PATH=$PATH:/usr/java/jre1.6.0_24/bin/
You can add this line to .bashrc file in your home directory. Adding this to .bashrc will ensure everytime you open bash it will be PATH variable is updated.
您可以将此行添加到主目录中的 .bashrc 文件中。将此添加到 .bashrc 将确保每次打开 bash 时都会更新 PATH 变量。
回答by Marc Nunes
I had these choices:
我有这些选择：
-----------------------------------------------
* 1 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
+ 2 /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
3 /home/ec2-user/local/java/jre1.7.0_25/bin/java
When I chose 3, it didn't work. When I chose 2, it did work.
当我选择 3 时，它不起作用。当我选择 2 时，它确实有效。
回答by Plentybinary
I found the best way for me was to download unzip then symlink your new usr/java/jre-version/bin/javato your main bin as java.
我发现对我来说最好的方法是下载解压缩，然后将你的新文件usr/java/jre-version/bin/java作为 java符号链接到你的主 bin。
回答by alijandro
I use the following script to update the default alternative after install jdk.
我使用以下脚本在安装 jdk 后更新默认替代方案。
#!/bin/bash
export JAVA_BIN_DIR=/usr/java/default/bin # replace with your installed directory
cd ${JAVA_BIN_DIR}
a=(java javac javadoc javah javap javaws)
for exe in ${a[@]}; do
sudo update-alternatives --install "/usr/bin/${exe}" "${exe}" "${JAVA_BIN_DIR}/${exe}" 1
sudo update-alternatives --set ${exe} ${JAVA_BIN_DIR}/${exe}
done
回答by Shree
- Execute: vi ~/.bashrc OR vi ~/.bash_profile
- 执行： vi ~/.bashrc 或 vi ~/.bash_profile
(if above command will not allow to update the .bashrc file then you can open this file in notepad by writing command at terminal i.e. "leafpad ~/.bashrc")
（如果上面的命令不允许更新 .bashrc 文件，那么你可以在记事本中通过在终端写命令打开这个文件，即“leafpad ~/.bashrc”）
- add line : export JAVA_HOME=/usr/java/jre1.6.0_24
- save the file (by using
shift + Z + Z) - source ~/.bashrc OR source ~/.bash_profile
- Execute : echo $JAVA_HOME (Output should print the path)
- 添加行：export JAVA_HOME=/usr/java/jre1.6.0_24
- 保存文件（通过使用
shift + Z + Z） - 源 ~/.bashrc 或源 ~/.bash_profile
- 执行：echo $JAVA_HOME（输出应该打印路径）
