There are various instances of this issue that we get such as JAVAC’, JRE, ‘MVN’, JAR’ is not recognized as an internal or external command, operable program or batch file, ‘Java’ is not recognized as ...

Here are the three easiest ways to fix Java’s “not recognized as an internal or external command” error: Install or reinstall Java and the JDK on your computer Add Java’s bin directory to the computer ...

上星期使用maven的时候还是一切正常。过了个周末，今天早上再用，却总是出现错误“'cmd' is not recognized as an internal or external command,”。不论是build project，还是用“mvn -v”显示maven 的版本。都能看到这个错误提示。 但是，如果直接在run里面输入"cmd"命令，可以 ...