I am trying to install Java in Windows 10 Home (64 bit). Like many tutorials point out, I downloaded the Java jdk setup file, executed it and once installed changed the Path in the Environment Variables. But for some reason, when I execute the command 'javac' it returns the not internal/external command error in Command Prompt but runs absolutely fine in Powershell. I tried to rectify this by uninstalling Java and reinstalling it very carefully, following all the steps but still this keeps on happening.
Also, during installation of Java, I lost the original value to my Path variable. Could this be causing the problem?
Edit : I was able to get the java command running in the command prompt but javac still won't work. I've already tried the methods suggested on other forums and this one but no luck so far.
See there is no problem with Java installation if you can find JDK(Java development kit) and JRE(Server Java runtime environment) in programme files in windows in a JAVA folder.
The main problem is with the environment variable declaration.
Go to environment variables and make a new path for that.
JAVA_HOME = "YOUR JDK & JRE INSTALLATION PATH"
And another one is
JAVA = "YOUR JDK & JRE INSTALLATION PATH"
Hope that help to you. After doing that if still there problem persisist just restart your PC and check again.
Just add your variable location up to /bin/
Refer to this :
https://www.windows-commandline.com/javac-not-recognized-internal-external-command/
Open file explorer
Right click computer then click properties
click advanced system settings
click environmental variables
click path (for me there was one in user variables for admin and another in system variables)
find the directory for javac (for me it was here C:\Program Files (x86)\Java\jdk1.8.0_191\bin)
so go back to file explorer and open program files x86
then open the java folder
then open the jdk folder
then open the bin folder
highlight the path in the search bar and copy it
click edit on path and paste into the path in the environmental variable for both(if you have more than one path)
If no path exists then create one in user variables
If there is any existing text place a semicolon ; between the text you pasted in there and the preexisting text.
close command prompt and reopen it.
type javac -version
the version info should be listed
This problem comes up with the directory of your command prompt.
check your PowerShell and command prompt default directory.
We can run command prompt as WinKey+R then type cmd, Hit the enter button then check our java version cmd javac -version.
Related
So I've been trying to figure out how to run .java files because I was trying to run someone's program and I've been researching solutions for sooo long
cd "directory with file trying to run"
set path=C:\Program Files\Java\my-java-version-or-whatever\bin
javac Test.java (<-- name of file)
also tried
SET JAVA_HOME
and that worked and showed a path but when I did javac again it still didn't work. All help is much appreciated!!
And for some reason it just keeps saying that javac is not recognized.
Please install JDK on your machine and point the JAVA_HOME to the same.
Find JDK Installation Directory
Open the default installation path for the JDK:
There should be a subdirectory like:
C:\Program Files\Java\jdk1.8.0_191
Set the JAVA_HOME Variable
Once you have the JDK installation path:
Right-click the My Computer icon on your desktop and select Properties.
Click the Advanced tab, then click the Environment Variables button.
Under System Variables, click New.
Enter the variable name as JAVA_HOME.
Enter the variable value as the installation path for the Java Development Kit.
Click OK.
Click Apply Changes.
If you have just set your JAVA_HOME make sure you restart your command console.
I've been learning java on my own and I've come to a point where I need to pass arguments from the command prompt. I had previously been using Netbeans, which has become a bit of a crutch, but I want to learn how to program using notepad and the command prompt. I am running Windows 8.1. I downloaded the JDK 7 to my C:\ directory. I tried typing "java -version" and "javac -version" to check it out (as my book says to do) but it tells me "'java' is not recognized as an internal or external command, operable program or batch file." It says the same when I try javac. I do this from C:\ and from C:\Java> and get the same result. I uninstalled Netbeans, thinking maybe it was interfering somehow ... still not working. The book I'm using says it covers Java 7.
I don't understand why it doesn't work. Is there some compatibility issue with Java 7 and win 8.1? My java 7 is update 71 or 72. Did this update change something and now arguments are passed differently? Can anyone help me out? Thank you.
You need to download the JDK (if you don't already have it) and add the location to the end of your PATH. In a single command line session you can do this with PATH=%PATH%;<jdk location> where <jdk location> is the bin folder of the jdk.
Some installs of java manage environment variables and some do not. It appears yours has not. or you have not installed it correctly.
many applications understand JAVA_HOME, so you should set that to the root of the installation in your environment variables.
You will also need to add the bin folder to your path.
Generally, when using windows, you can install a windows exe version, which will manage all of this for you. Other installations just copy themselves to the c drive and expect java applications to know where to look.
Go to System environment variable. Select Variable PATH. Click on edit button. Append a ; after current value of Variable value. Copy jdk's bin folder path. In my PC it is "C:\Program Files\Java\jdk1.8.0_20\bin" without quotes. Then paste jdk's bin path. Copy jre's bin folder path. In my PC it is "C:\Program Files\Java\jdk1.8.0_20\jre\bin". Append a ; then paste jre's bin folder path. Click OK.
Download the JDK from this page. Run the installer.
Open the Command Prompt. Try it. It works. Yay!
If you use the full path to your java.exe, you dont need to set up any PATH and JAVA_HOME:
c:\> cd \work
c:\work> c:\java\bin\java.exe -cp classes\ your.Main
If your book does not use the normal JDK installers it really is supposed to explain that. (However it is normal behaviour for any executable).
(The above example asumes you compile into c:\work\classes\your\Main.class and your JDK is installed (installer does the unpack) in C:\java (typically you would use default locations like C:\Program Files\Java\jdk1.8.0\bin\java.exe).
I'm trying to get the java command to work on my computer. Whenever I try to use it, I get the error "'java' is not recognized as an internal or..."
What I've done
So far I've traced the issue through my system environment variables, which has a variable PATH that links to "C:\ProgramData\Oracle\Java\javapath" or javapath for short.
There are 3 files in the javapath folder, and if you click on them a popup says:
But when I examine the properties of the shortcut and click "open folder location" it sends me to the right place (?? what is this).
Just in case, I tried to recreate the shortcut; I called it java2 and it now works (opens a command box for a split second and closes) when I click on it. However, testing it in command prompt with the line "java2 -version" returns "'java2' is not recognized as an internal or external..."
Details
I just installed java 8, and I've verified that it was installed correctly
I'm running a 64 bit windows 7 OS
Have you checked your environment variables for Windows? When you installed the JDK/JRE the directory should have been added to the PATH variable. The directory added needs to contain the java.exe executable. It should be located in C:\Program Files\Java or something like that if you installed it using the default settings. Once you find that directory find the bin directory inside it.
In order to check that:
Right click My Computer and hit Properties
On the left side hit Advanced System Settings
Hit the Advanced tab and then Environment Variables down at the bottom
Find the PATH variable and then hit edit. Confirm that the location of the JDK /bin directory is there, if it is not then add it.
Also, if the JAVA_HOME variable isn't already set, this may be a good idea.
When I go to open eclipse, it gives me a run time error saying that the path to the JDK is not right.
I have no idea where to save the link so that i can get it to open
First Install Java on your pc: It should create Java Folder in C:\Program Files.
You have to set Classpath like this :
Set the CLASSPATH environment variable
(for **Windows NT/2000/XP**)
1. At the left bottom corner of your computer desktop, choose Start -> Setting -> Control Panel, and double-click System
2. On Microsoft Windows NT, select the Environment tab; on Microsoft Windows
2000/XP select the Advanced tab and then Environment Variables.
3. For either User variables or System variables, click New and in the popup window, enter Variable name as CLASSPATH (note that all letters should be capital), and the directory where your JDK is installed as the Variable value.
For example:
If your JDK is installed at: C:\jdk1.4.1_06
Put the following line as the value:
C:\jdk1.4.1_06\bin;C:\jdk1.4.1_06\jre\bin;.
The first is where the java compiler 'javac' is, the second is the java run time environment 'java' is, and the final '.' denotes your working directory, so that the compiler and jre will find where your programs are. To be safe, you may also want to append the above line to then end of your PATH variable. Use ';' as the separator.
Save the variables, test the setting by opening a DOS prompt, type in
echo %CLASSPATH%
If your environment variables are set correctly, you should see your settings.
Or, you can just type in
javac
java
If your PATH and CLASSPATH is correct, windows should recognize those commands.
You do NOT need to restart your computer when installing Java.
Check whether TextPad and Java SDK work on your computer
Download HelloWorld.java into your local drive. Be sure that filename is case sensetive in JAVA programming.
Start TextPad, and open this HelloWorld.java file.
Click menu "Tools" ---> "Compile Java" to compile java file.
Click menu "Tools" ---> "Run Java Application" to run this file.
If you see "Hello World" in a DOS PROMPT window, that means there is no problem with your TextPad to compile/run Java program. Congratulations. You can start your java programming now. If you see some errors when run Java program, please click here to get more information.
For a more comprehensive description on how to setup Java environment on Windows machinese, please refer to the Sun document at: http://java.sun.com/j2se/1.4.2/install-windows.html
For **windows 7**: Follow this link http://www.abodeqa.com/2012/08/11/how-to-set-path/
Then : Start Compatible eclipse (e.g :64bit eclipse on 64bit os).
In Eclipse, select Windows | Preferences
Click the + in front of Java or double-click Java (after the +)
Click Installed JREs
Under the Name column, double-click jre1.5.0_08.
Click the Add External Jars... button.
In the Jar Selection window, navigate to your workspace folder, and double-click the file cs15-1xx.library.
In the Edit JRE window, click OK
In the Installed JREs window, click OK
Terminate (X) the Welcome window
You can always get it back by selecting Help | Welcome
Terminate (X) the Eclipse window.
For more Details follow this : http://blog.ajduke.in/2013/04/28/setting-up-new-java-compiler-and-runtime-in-eclipse-ide/
You can specify the target JRE when launching eclipse by with the -vm command line argument (either through a shortcut or in the eclipse.ini file).
Command line syntax: eclipse -vm c:\jre\bin\javaw.exe
eclipse.ini file syntax (use 2 lines)
-vm
c:/jre/bin/javaw.exe
You can also copy a given version of the JRE under your eclipse installation directory.
Generally speaking I would really advise against adding %JAVA_HOME%/bin to your SYSTEM path. In my experience, this usually leads to many unexpected behaviors. Far better IMHO to set the JAVA_HOME and add its /bin directory to the PATH through scripts/command line/shortcuts/etc. and invoke those when needed.
I downloaded this Java JDK and installed it.
But when I go to the command prompt to check the version, it says it's not recognized.
Is anyone else experiencing this issue with the latest Java?
I might not have installed the right version. I need the java that works with grails
C:\>java
'java' is not recognized as an internal or external command,
operable program or batch file.
C:\>java -version
'java' is not recognized as an internal or external command,
operable program or batch file.
C:\>
when i do a search on my computer for java, it does not find anything
Windows 2k8 R2 server-
For both java [-option] or %JAVA_HOME% to work in the command line you need the following:
In Control Panel->System and Security->System->Advanced system setting->Advanced->Environment Variables->System Variables
Edit the Path variable and add a ";" after the last value and add the the path to the Java bin directory:
e.g.- C:\Progra~2\Java\jre6\bin\
Add the JAVA_HOME Variable with the value set to the path for the java executable:
e.g.- C:\Progra~2\Java\jre6\bin\java.exe
Press simultaneously the "windows" and "pause" buttons on your keyboard, this will bring up the System Preferences dialog.
In the Advanced tab, find Environment Variables.
Then, in the User (upper) section, create or update the following two variables :
JAVA_HOME = where you put your JDK, eg. C:/Java/SDK
PATH = %JAVA_HOME%/bin
Close the dialogs.
Then, in a new command-line console, try "javac -version" and see if it's detected.
It's important that you use a new console, because environment variables are read only when the console is launched.
Java is typically installed (on Windows) as C:\Program Files\Java\jdk<version>
That installation directory has a subdirectory bin which you need to append to your PATH environment variable via the control panel. Then, the commands like java, javac etc. will be available on the command line.
BTW, the same is true for Grails.
Is the -version flag not recognized, or is the "java" command not recognized? One way to test this is just to type 'java' by itself and run it and see what happens.
If the command is not recognized, make sure that the JDK's install path is in your windows PATH. If not, you won't be able to use any of the java executables from the command prompt. Here's another link that may help out.
You need to manually add the path to javac.exe and java.exe to your operating system path. The Java installation program doesn't do that for you.
You most likely don't have java.exe in your system's PATH variable.
For Linux:
check $PATH and $JAVA_HOME. You can configure it in /etc/environment
From console you can check it like:
$ echo $PATH
For Windows:
My Computer -> Properties -> Advanced -> Environment Variables
Check there PATH.
From console you can check it like:
echo %PATH%
You should have a Java icon in Windows Control Panel. Locate the Java tab and click the View button. That will show you the path to the Java executables.
Last but not least, make sure you have restarted the computer so changes in the PATH variable can take effect.
You installed the JDK. Isn't java.exe part of the JRE? Do you have that installed?
Maybe your system variables in the environment variables are not set properly. Follow the steps in the link below. Finally, make sure the path component in system variables has only one JDK path. Delete other JDK paths that you won't use.
https://docs.oracle.com/javase/tutorial/essential/environment/paths.html
You might have installed a previous or older version of Java so you can just uninstall it and directly download JDK from Java JDK
I was also facing the same issue but when I downloaded and installed the latest version the issue was resolved.
Also uninstall any other Java versions which may be present in the program files.
To get to know other versions which may be present in your computer use Windows File Explorer to go to:
Files > Windows C > Program Files > Java
All the JDK and JRE you have will be listed there. Uninstall any other Java versions other than what you installed. And then make sure you have set the path variable of the JDK.
For me, it was incorrect line in the PATH
(1) Check PATH: Type "Edit System Environment Variables" on the search -> System Properties -> Advance -> Environment Variables -> System variables -> Path
(2) On the list, mine was C:\Program Files (x86)\Common Files\Oracle\Java\javapath so I just add \ at the end (the exe files in the javapath folder)
OS: Windows 10 64 bit
IF you set the PATH and it's not showing up in cmd when you run %PATH%, try restarting your computer.