Why can’t I run my Java program in CMD?

It means that javac.exe executable file, which exists in bin directory of JDK installation folder is not added to PATH environment variable . You need to add JAVA_HOME/bin folder in your machine’s PATH to solve this error. You cannot compile and run Java program until your add Java into your system’s PATH variable.

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How do I run Java once installed?

Once downloaded, install. in order to run Java from anywhere in your system, the files need to be added to your PATH variable in windows. To do this, go to ‘Control Panel ‘ -> ‘System’ -> the ‘Advanced system settings’ option on the left. Now under click ‘environment variables’ and then click edit on the PATH variable.

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