javac not working in windows command prompt

Question

I m trying to use javac with the windows command prompt  but it s not working   After adding the directory  C  Program Files Java jdk1 6 0 16 bin   to the end of the PATH environment variable  the java command works fine  but using javac gives me the following error       javac  is not recognized as an internal or external command  operable program or batch file

User · Answer

Give it as  C  Program Files Java jdk1 6 0 16 bin   Remove the backslash it will work

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Change the folder  jdk1 7 0 45   jdk1 7 0 60  and update the path in Windows environment  Otherwise  the path ignores the dot at the front which stands for hidden file and so the folder is not displayed in PATH strings

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I appreciate this is an old question now but my solution wasn t an answer on here so posting it in case anyone else tries all the rest   In my case  a previous install of the Java JRE  in ProgramData Oracle Java  had a path variable at the top of my list of path variables  The contents of that  Oracle  path had a java exe but not a javac exe  I added my full JDK path to the top of the list of path variables  ahead of the  Oracle  one  and it then picked up javac exe as well as java

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If you added it in the control panel while your command prompt was open  that won t affect your current command prompt  You ll need to exit and re-open or simply do   set  path  path  c  program files java jdk1 6 0 16 bin    By way of checking  execute   echo  path    from your command prompt and let us know what it is   Otherwise  make sure there is a javac in that directory by trying    c  program files java jdk1 6 0 16 bin javac exe    from the command prompt  You can also tell which executable  if any  is being used with the command   for  i in  javac exe  do  echo    PATH i   This is a neat trick similar to the which and or whence commands in some UNIX-type operating systems

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I just had to do this to get this to work on windows 7 64   Open up a command prompt  cmd exe  and type   set CLASSPATH C  Program Files Java jdk1 7 0 01 bin   Make sure you reopen all running command prompt Windows to get the environment variable updated as well

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I know this may not be your specific error  but I once had a leading space in my path and java would work but javac would not    For what it s worth  I offer the sage advice   Examine your Path closely

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I faced the exact same problem that java would work but javac would not on a cmd prompt in Windows 8   The problem occured because I forgot to remove   gt   at the end of the path name  i e   it was like this   C  Program Files Java jdk  bin gt    where it was suppose to be like this   C  Program Files Java jdk  bin

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After a long Google  I came to know that javac exe will be inside JDK C  Program Files Java jdk version number  bin  not inside JRE  C  Program Files  x86  Java jre7 bin    JRE doesn t come with a compiler  It JRE  is simply a java runtime environment  What you need is the Java development kit   in order to use  compiler javac  javac will not work if you are pointing bin inside jre  In order to use javac in cmd   JDK must be installed in your system     For javac  path  path   C  Program Files  x86  Java jre7 bin  this is wrong   path   C  Program Files Java jdk version number  bin  this is correct  Make sure that  javac exe  is inside your  C  Program Files Java jdk version number  bin   Don t get confused with JRE and JDK  both are totally different   if you don t have JDK pls download from this link   https   jdk java net   or  http   www oracle com technetwork java javase downloads index html  reference thread for JDK VS JRE  What is the difference between JDK and JRE

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for  d  i in    Program Files Java jdk    do set JAVA HOME  i set JAVA HOME   this solution worked to me

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Windows OS searches the current directory and the directories listed in the PATH environment variable for executable programs  JDK s programs  such as Java compiler javac exe and Java runtime java exe  reside in directory   bin   where  denotes the JDK installed directory  e g   C  Program Files Java jdk1 8 0 xx   You need to include the   bin  directory in the PATH   To edit the PATH environment variable in Windows XP Vista 7 8    Control Panel   System   Advanced system settings Switch to  Advanced  tab   Environment Variables In  System Variables   scroll down to select  PATH    Edit      now read the following 3 times before proceeding  THERE IS NO UNDO     In  Variable value  field  INSERT  c  Program Files Java jdk1 8 0 xx bin   Replace xx with the upgrade number and VERIFY that this is your JDK s binary directory     IN FRONT of all the existing directories  followed by a semi-colon     which separates the JDK s binary directory from the rest of the existing directories  DO NOT DELETE any existing entries  otherwise  some existing applications may not run   Variable name    PATH Variable value   c  Program Files Java jdk1 8 0 xx bin  existing entries

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I was having the same problem posted in this title  Java would work  but javac would not in the Windows command prompt  cmd exe    For me  it was simply that I had placed a space when adding C  Program Files Java jdk1 8 0 bin to the end of my  PATH  environment variable  Remove the space between the   and the next file path

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The path will only be set for the administrator account  Therefore it is important to launch command prompt as administrator  if you are not already

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Okay this can not be the case always but many of us have done this mistake in the past and few out of those are still not aware of it  which is  every time you append a path  any path  of any environment variable  you re likely to hit the space bar right after the  semicolon   as you normally would  after the  period  while typing in an editor      This will create a leading space in the path e g   C  Program Files Java jdk1 6 0 bin  and therefore  javac exe  won t be found by the system

User · Answer

Ensure you don t allow spaces  white space  in between paths in the Path variable  My problem was I had white space in and I believe Windows treated it as a NULL and didn t read my path in for Java

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C  Program Files Java jdk1 6 0 bin  sometime you may forget to put semicolon on last existing path

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When i tried to make the  java to  class the command Javac didnt work  I got it working by going to C  Program Files  x86  Java jdk1 7 0 04 bin and when i was on that directory I typed Javac exe C Test test java and it made the class with that tactic  Try that out

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Try the solutions here  http   techdem centerkey com 2009 05 javahome-command-script html  These are much more robust to change -- like when you upgrade the JDK or JRE  since there is no hard coded path   The quick solution  if you don t want to read the blog  is  C   gt for  d  i in    Program Files Java jdk    do set JAVA HOME  i C   gt set PATH  PATH   JAVA HOME    You can then add these lines to a startup login script

[java] javac not working in windows command prompt

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