Как я могу отобразить содержимое переменной среды из командной строки в Windows 7?

В дополнение к предыдущему ответу, если вы используете Powershell echo %PATH%, не будет работать. Вместо этого вам нужно использовать следующую команду:echo $Env:PATH

As an additional bit of information: While SET works with global or system variables, sometimes you want to write and read User variables, and this is done with the SETX command. SETX is included in the base installs of Windows beginning with Vista, but was also available in Windows XP by installing the Resource Pack.

One difference about SETX though is that you cannot read the variable out in the same command window you wrote it in. You have to write the SETX command in one Command or Powershell window, and then open a new window to read it using ECHO.

SETX can also write global or system variables.

To Set a user variable using SETX:

setx variable value 

To set a global or system variable using SETX:

setx /m variable value 

To read a user or global variable:

Remember, you must open a new Command or Powershell window to read this variable.

echo %variable% 

From SET /?:

SET P 

would display all variables that begin with the letter 'P'

So for example if you want to find value of environment variable %PATH%, you can just type set path.

This is 3 characters shorter than echo %PATH%, but note that it also lists other variables starting with "path" (e.g. PATHEXT).

The solution was a bit different for me: it won't recognize the system environment variable JAVA_HOME, so I had to set JAVA_HOME as User environment variable, so that i can use %JAVA_HOME% in system environment variable setting up.

Resuming, I had to:

-add a user environment variable: %JAVA_HOME% as:

"C:\Program Files\Java\jdk1.8.0_25"; 

-add to %PATH% system environment variable:

"%JAVA_HOME%\bin;" 

-latter on command line:

echo %JAVA_HOME%, and it retrieved the correct path (before it wasn't recognizing); echo %PATH%, and it retrieved the "C:\Program Files\Java\jdk1.8.0_25\bin" composed with %JAVA_HOME% user variable;

And it worked for me. I hope it helps!!