javac无法识别为内部或外部命令

Question

I know this question has been asked a lot of times, but I tried a lot of solutions and none of them work. If I write "path" in prompt, I get this:

PATH=%CommonProgramFiles%\Microsoft Shared\Windows Live;C:\Windows\system32;C:\W
indows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\P
rogram Files (x86)\ATI Technologies\ATI.ACE\Core-Static; ;C:\Program Files\Commo
n Files\Microsoft Shared\Windows Live; C:\Program Files\Java\jdk1.7.0_45\bin;

So, it seems correct. What should I do?

Answer 1

There is an extra space in front of C:\\... Remove that.

...; C:\Program Files\Java\jdk1.7.0_45\bin;
    ^

Cheers,

Answer 2

C:\Program Files\Java\jdk1.7.0_45\bin;

在这行之前有多余的空间。

Answer 3

in Windows environment you can set path in two ways

1) Temporary set path

open cmd(command prompt) start ---> run --- type cmd ----hit enter in the cmd type this

set path hit enter Ex: set path C:\\Program Files\\Java\\jdk1.6.0_29\\bin

this will set path to current cmd window only

2) Permanently set path

right click my computer----- > properties -----> Advance ----> Environment variables ---->inside system variable Group box select path click edit,in opend window variable value text box put ; at the last and past the path of your jdk directory's bin -----> select ok

now open the cmd type path command see... that path in the out put text