CentOS7下 javac:未找到命令

问题描述：

在linux下编译java程序，执行javac编译生成class文件时，在centos7终端输入如，javac hello.java 会提示未找到指令，但用java -verison测试环境变量是没问题的。

尝试解决：

重新再linux配置环境变量，输入 vi /etc/profile进入，添加以下代码：

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export JAVA_HOME=/usr/local/jdk1.8.0_144
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

再测试，最后也没有成功

后来在stackoverflow上看到了这个

84 down vote accepted You installed the Java Runtime Environment (JRE)

only, which does not contain javac. For javac, you have to install the

OpenJDK Development Environment. You can install java-devel or

java-1.6.0-openjdk-devel, which both include javac.

By the way: you can find out which package provides javac with a yum

search, e.g.

su -c ‘yum provides javac’ Another note: using yum and openjdk is only

one possibility to install the JDK. Many people prefer Sun/Oracle’s

“original” SDK. See How to install Java SDK on CentOS? and links for

alternatives.

大意就是我们用yum来装原生的就行了

在终端输入

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yum install java-devel

执行安装，再测试就行了

补充：Vi编辑常用快捷键

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复制：ctrl+insert
粘贴：shift+insert

按Esc保存退出编译，shift+zz退出