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Java run command not opening

I had installed Java to work with Android Studio. Java works fine on Android Studio but when I try to use Java run command on my computer, it opens and closes immediately. How do I run Java on my computer?

Open command window (cmd on Windows)
Type java -version
You should see the installed java version output.

u need to add this path C:\Program Files\Java\jdk1.8.0_05\bin wheres javac.exe locate copy the path
1. go to System properties then click on advanced system setting .
2. click on Environment variables as picture describe
3. choose the path from system variables and edit it
4. go to end of the line and important to separate between variable values before paste javac.exe path make sure to put semi-colon and paste the path

There is a possibility that you have the following Registry setting configured:
HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System!DisableCMD
If you see the value 'DisableCMD' in the above location then simply delete it.
If you are not comfortable with editing the Registry then you will find this setting by going to:
Start > RUN
Type gpedit.msc and press OK
Navigate to: User Configuration > Administrative Templates > System
Look for the option 'Prevent access to the command prompt'
Double click it and choose 'Not Configured'

Java:System cannot execute the specified program

The javac -version gives the proper version of javac.
But, java -version gives the error as
"System cannot execute the specified program"
The PATH variable is set properly as "C:\Program Files\Java\jdk1.8.0_102\bin"

It is not programming question. But you have to add your %JRE_HOME%\bin to PATH variable

That specific error is likely related to the evaluation of a symlink to the java executables.
Normally, an invalid executable name (meaning, one that is not found in the path) will yield an error with the following text:
'javax' is not recognized as an internal or external command, operable program or batch file.
As you are receiving a different error, this is likely not your issue.
When java is installed on a Windows PC, the installer creates a directory (usually with the path of C:\ProgramData\Oracle\Java\javapath, and places 3 symlinks in it. They are for java.exe, javaw.exe, and javaws.exe. This prevents your path from becoming too cluttered with potentially colliding executable names.
javac.exe (and keytool, etc) work because you added your JRE/JDK bin folder to your PATH. But why does doesn't java/javaw/javaws work? Because it finds the javapath directory above first (PATH is searched left to right). You can see this issue by using the where command. For example:
C:\>where java
C:\ProgramData\Oracle\Java\javapath\java.exe
C:\Program Files (x86)\Java\jre1.8.0_31\bin\java.exe
C:\>where keytool
C:\Program Files (x86)\Java\jre1.8.0_31\bin\keytool.exe
This would be an alright situation, except that the javapath\java.exe symlink is not working, a policy is disallowing its execution, or its path is wrong.
From an administrative command prompt, run the following command. The result should be similar to below
C:\>fsutil behavior query SymlinkEvaluation
Local to local symbolic links are enabled.
Local to remote symbolic links are disabled.
Remote to local symbolic links are disabled.
Remote to remote symbolic links are disabled.
If "Local to local" symbolic links are disabled, that is your problem (as this settings prevents the following reparse points)
You can enable them with the following command:
fsutil behavior set SymlinkEvaluation L2L:1
Double check that the setting changed with the query subcommand. You do not have to restart for this setting to take effect.
If that does not resolve your issue, ensure that the destination of the symlink exists. Try running it via Explorer; a console dialog should pop up then close. If it does not, an easy way to confirm it's correct is to right click the symlink and select "Open File Location". If a error dialog appears stating 'Problem with Shortcut: The item 'java.exe' that this shortcut refers to has been changed or moved [...]', then the path is incorrect.
You can see what the path is set to via the 'Shortcut' tab in the properties of the symlink. If the path is wrong, you can delete the symlink and then recreate it via the mklink command. Delete the symlink and then from an administrative command prompt, run the following; be sure to replace the second path with that of your actual JRE/JDK!
mklink C:\ProgramData\Oracle\Java\javapath\java.exe "C:\Program Files (x86)\Java\jre1.8.0_91\bin\java.exe"
At that point, run 'java' from the command line and see if it works.
If it does not, navigate to your desired java.exe, view its file properties, and ensure there is no "Unblock" button available on the bottom. If there is, click it.

you need to set the PATH variable(jre/bin/) in environment settings.
in cmd , set PATH ="C:/ProgramFiles/java/jre*/bin"

Java path set wrongly

I have installed Java on a new system. Some random path in my C drive is automatically set for my PATH variable. Whenever I try to run Java, it shows java.exe not found in that wrong path!
I'm trying to change the PATH variable using the SET command, but the new path is only getting added along with the old one. I could not run Java on the system.
set PATH=%PATH%;C:\Program Files\Java\jdk1.7.0_71\bin
I've tried setting PATH variable in Windows Environment Variables list also after setting JAVA_HOME!
When I type Java in cmd, i get:
The system cannot find the file C:\ProgramData\Oracle\Java\javapath\java.exe.
This path is the old unknown automatically set path.
Is there any way to run Java! I'm using windows 8.

if you are using windows system, please create java_home as a variable and set java home path i.e. till C:\Program Files\Java\jdk1.7.0_71, and in path variable do not delete existing just append new with ;%java_home%\bin
this will work
in you case SET is valid till command prompt is open.
do the above changes in my computer -> properties -> advanced ->environment variables

I know this post id very old. I faced this issue recently. Please follow the following steps to resolve your issue:
Search for "Regedit" in "start menu".
Once found, right-click it and choose "run as Administrator" option.
Enter your administrator credentials and Enter.
Go to "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.7"
Double-click on "JavaHome" name and change its value to "C:\Program Files\Java\jdk1.7.0_71".
Close all your command prompts and open a new Command prompt and it should reflect.

set PATH=C:\Program Files\Java\jdk1.7.0_71\bin;
will set the path of java only
and the old path will not get added and that will be till the command prompt
session lasts.
to keep the existing path setting intact and add the java path use below command.
set PATH=C:\Program Files\Java\jdk1.7.0_71\bin;%PATH%

Java command not found

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.

I'm trying to set my JAVA_HOME path to use my javac.exe?

I'm on Windows 7 and I'm trying to set my JAVA_HOME path to use PhoneGap on android, when i create a project using the command line "cmd" it tells me that it can't find javac.exe? although i'm sure that I've set the variable right
here's my stuff:
Variable name: JAVA_HOME
Variable value: C:\Progra~1\Java\jdk1.7.0_17\bin
(I've also tried to use: C:\Progra~1\Java\jdk1.7.0_17\bin\javac.exe)
My javac.exe location on my laptop C:\Program Files\Java\jdk1.7.0_17\bin\javac.exe
and it still tells me that it can't locate the javac.exe
What I type to create the project and i meet this problem is this:
C:\Users\user>cd C:\Users\user\Desktop\phonegap-2.8.1\lib\android\bin
C:\Users\user\Desktop\phonegap-2.8.1\lib\android\bin>create.bat
Cannot locate javac.exe using the PATH environment variable.
Retry after adding directory containing javac.exe to the PATH variable.
Remember to open a new command window after updating the PATH variable.
Visit http://java.oracle.com if you need to install Java (JDK).
Also, i've tries restarting the windows and closing the command prompt and redownloading the JDK.
Thank You.

cmd is using the values from the PATH variable to locate javac :
set "PATH=%PATH%;C:\Program Files\Java\jdk1.7.0_17\bin"
For other softwares (Tomcat, Maven, etc.) JAVA_HOME must indicate the root of your JDK :
set "JAVA_HOME=C:\Program Files\Java\jdk1.7.0_17\"
No need to restart Windows. When using set the changes are taken immediately.
If you choose to modify those variables in the Control Panel, you have to close and relaunch cmd for the changes to take effect.

You have to add java
C:\Program Files\Java\jdk1.7.0_17\bin
Note that your path may be different.
to your environment variables and restart your console.
You can find how to set your variables here:
http://www.itechtalk.com/thread3595.html

Set the JAVA_HOME Variable
Right-click the My Computer icon on your desktop and select Properties.
Click the Advanced system settings. 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(C:\Program Files\Java\jdk1.7.0_17).
Click OK.
Click Apply Changes.
You might need to restart windows.

Set the JAVA_HOME environmental variable to
C:\Program Files\Java\jdk1.7.0_17
Press
Win + Break > Advanced System Settings > Environment Variables > System Variables
Modify/set JAVA_HOME to the above. (No need to restart)

I already had this error when I tried to create a new phonegap project for android but unfortunately I don't remember how exactly I have fixed this.
I don't know if you have followed the phonegap documentation so here is the link : new project, especially the part 3B (be careful about ; in your PATH).
If you don't know what to do now, maybe you should do it again step by step.

May be a little old, but since this is the first goolge result, I might as well add a little something.
You need to create the JAVA_HOME variable AND edit the PATH variable, adding ;%JAVA_HOME%\bin (with a ;) so cmd and some other apps can actually use javac and the rest of the tools