We Keep Coding

'java' is not recognized as an internal or external command, operable program or batch file

I am using java 12.0.2, JAVA_HOME is set as C:\Program Files\Java\jdk-12.0.2 and PATH is having %JAVA_HOME%\bin
still when I try executing java command its giving me the error 'java' is not recognized as an internal or external command, operable program or batch file.
java and javac are part of JRE and JDK 12 doesn't have JRE now, so how to setup this.
please don't relate this issue with old questions, until java8 it's fine but its not working now in windows 10.

java and javac are part of JRE and JDK 12 doesn't have JRE now, so how
to setup this.
After JDK 10, there is no separate JRE shipped and you do not need a separate JRE anymore. The JDK is enough.
I am using java 12.0.2, JAVA_HOME is set as C:\Program
Files\Java\jdk-12.0.2 and PATH is having %JAVA_HOME%\bin
The space in the path may cause problems. I suggest you set C:\Program Files\Java\jdk-12.0.2\bin directly into PATH. Also, make sure to promote this entry to the top (beginning) so that this entry overrides the existing Java version (if any).
Last but not the least, start a new cmd window session to check java -version because the changes in the environment variables using the GUI does not become effective in already open cmd windows.
For any misconfiguration, if you can not make it work, download a fresh JDK and follow the instructions on the download page.

Try removing any existing java paths and making sure your JAVA_HOME is correct. There is no JRE but the java command should work if your env vars are correct. It is most likely a configuration error so deleting old configuration and reconfiguring will probably hlep.

The problem was caused by Python which was not allowing to execute java/javac commands. Once I uninstall the python everything worked fine.
I am still not sure what happened when I install Python as I explicitly didn't do anything except enabling the tick mark to setup the path variable while installing it.

Unable to Start Talend Tool JAVA Version incompatibility

My Talend tool version is 5.6. As mentioned in Talend documentation it needs Java Runtime Environment 7 i.e jdk1.7, which is installed - along with set java_home in my environment variables. As per me it should work.
However I have jdk1.8 installed too, but I'm correctly pointing jdk1.7 path at environment variable.
Alternatively I have tried giving jdk1.7 path in Talend's Talend-Studio-win-x86_64.ini file. It's still giving me error.
Below is snapshot: in cmd the installed version shows jdk1.8 where in echo %JAVA_HOME% it shows path of jdk1.7
While starting tool this error comes:

Create a batch file with the following command:
Talend-Studio-win-x86_64.exe -vm "[jdk path]\bin"
Then start the studio by executing this batch.

Talend is based on eclipse, so you can set the java vm to use in the ini-file. (Sorry, I don't have an installation here right now, I think it is called talend.ini - nevertheless, it is located in talend's installation folder.)
Add the following to the top of the file:
-vm
[path to your java 7]/bin/javaw.exe

try to make changes in TOS_DI-win-x86_64.ini file
add line
-vm
C:\Program Files\Java\jdk-11.0.14\bin\javaw.exe
And update or confirm the version as below.
-Dosgi.requiredJavaVersion=11.0.14
Hope it'll help to fix the issue

Suppose you have talend in c:\talend and jdk1.7 is in C:\jdk1.7.
You can do like the following in windows environment.
Open command prompt.
Goto the bin folder location where jdk 1.7 is located. For example if you have jdk in C:\jdk1.7 then
cd\
cd C:\jdk1.7\bin
Then from bin folder of jdk type the full uri of the executable and hit enter.
In the above supposition c:\jdk1.7\bin>c:\talend\tos_di-xxxxx.exe
In the above statement tos_di-xxxxx.exe is the executable file depending on the os environment

Eclipse not running anymore - code 13

I updated my java "jre" and during the installation, the wizard asked me to uninstall earlier versions as a safety measure, so i did.
I have java version 1.8 now but when i run eclipse i get "code 13" error, saying that it requires version 1.6. Is there a solution to this problem other than uninstalling eclipse and re-installing it? I have plenty of plugins going on there with emulators for android.
Any help appreciated.

Check your Eclipse.ini file, whether the path to javaa is provided correct.
eg:
-vm
C:\Java\JDK\1.6\bin\javaw.exe
The -vm option and its value (the path) must be on separate lines.
The value must be the full absolute path to the Java executable, not just to the Java home directory.
The -vm option must occur before the -vmargs option, since everything after -vmargs is passed directly to the JVM

Ant and Eclipse

Hi I am a beginner java programmer and recently I've started reading Thinking in Java 4th edition to consolidate my knoledge of java after I read Head first Java.Problem is that this book has it's own library and I can't seem to make it work in eclipse even after I did everything it said on the website guide.I instaled ant acordinly with this video guide http://www.youtube.com/watch?v=XJmndRfb1TU and i'm getting this error:
"Unable to locate tools.jar.Expected to find it in C:\Program files\Java\jre7\lib\tools.jar
Buildfile:C:\TIJ4\code\build.xml
build:
BUILD FAILED
C:\TIJ4\code\build.xml:59:J2SE5 required
Total time:0 seconds
I tried reinstaling JDK witch was suggested on a forum but it still dident work so I don't really know what to do.
Can anyone tell me how can I solve this problem? Also, more importantly, can't this be done with Eclipse alone without installing Ant(I've only used eclipse for code writing and compiling so I'm not very familiar with it)Thant you.

You are using a JRE instead of a JDK. Install a JDK and point your PATH and JAVA_HOME variables to the JDK home, not to the JRE home.
I see that Ant is using the Java Home from the JRE, e.g. C:\Program files\Java\jre7\
But it should be C:\Program files\Java\jdk1.7.0\ or similar.
Check your system's environment variables (e.g. press Windows-Key and Pause together, then select Extended Settings > Environment Variables. Check that JAVA_HOME is set to the JDK installation path and that in the PATH variables, the folder of the JDK comes before the folder of the JRE (or remove/replace the JRE path altogether with the one from the JDK).
Ant needs to find the JDK first in the PATH.

Install the JDK, latest version, and check the environment variable JAVA_HOME.
If it is not found, create it and set it to C:\Program Files\Java\jdk1.7.0 ...

tools.jar contains the java compiler, and only comes with the Java Development Kit (JDK). Your error message point to the Java Runtime (JRE).
From Eclipse, you set that from Window/Preferences/Java/Installed JREs. This is equivalent to, and will override, the alternative way of setting it via Windows environment variables.

I tried installing the JDK - jdk1.7.0_09
and did whatever was needful in the Environment Variables section
but i still was getting this error
"Unable to locate tools.jar. Expected to find it in C:\Program Files\Java\jre7\li
b\tools.jar
Buildfile: build.xml does not exist!
Build failed"
Tools.jar file did not really exists in this path, instead i found it in C:\Program Files\Java\jdk1.7.0_09\lib
so i simply copied this tools.jar file and placed it under C:\Program Files\Java\jre7\li
b\
and it worked - (not sure if that was the right way)
Now when i typed in the cmd prompt "ant" it gave me the below error :
Buildfile: build.xml does not exist!
Build failed
On investigating it further i found that if you get the above error it means that ant is installed successfully
http://ant.apache.org/manual/install.html#getBinary - Check Installation

what ivantrox86 said is true, but you need to do it in all the build.xml files, and there are like 20 of them. so go to each and every folder in the c:\tij4\code directory and find every build.xml file, and change the second argument (arg2) to 1.5, instead of the default value (${ant.java.version}). works 100%

This can happen with ant if JAVA_HOME is set incorrectly - it seems to try to guess what the value should be and comes up with the jre7 address. In my case setting JAVA_HOME to C:\Progra~1\Java\jdk1.7.0_45 fixed the problem. Of course the address will vary depending on where your jdk is installed.

please search and change this line in all files.:
<equals arg1="1.5" arg2="${ant.java.version}"/>
for
<equals arg1="1.5" arg2="1.5"/>

Run eclipse on windows 7 64 bit

I'm trying to run eclipse for java in Windows 7 64bit edition, and when I run the eclipse.exe file, absolutely nothing happens. A ephimeral javaw.exe process is created in the task manager, but as I said, it's just there for a split second, and it disappears, after that NOTHING. I tried compiling a small program with the javac.exe file, and that works all right, but for some reason I cannot run Eclipse.
Any suggestions on what I could be doing wrong. I'm a complete Java noob, it's the first time I try to do this.
These are the files I have, and I downloaded the Windows 64bit version of eclipse.
Thanks!
EDIT
OK, solved. The book I'm using is misleading... it said I should use the javaw.exe file from jdk1.6.0_21, and doing that didn't work. Now I tried with one in jre6, and it ran.
Thanks everyone and sorry for the hassle!

First, check you eclipse.ini (even a space at the end of a line can prevent eclipse from starting)
Second I am surprised to see java* file in your Eclipse distribution.
You shouldn't' have those, and instead refer to the right java (64 bits) in your eclipse.ini.
In both case, see this eclipse.ini as a good example.
Check also the <workspace>/.metadata/.log (error log file).
I just added it there because it was asking for it, supposedly the best way it to put it in the PATH.
If eclipse is "asking for it", that means your current java installation is not part of the PATH. It need to be reference from the eclipse.ini file.
See also FAQ How do I run Eclipse?
In any event, don't copy any java files around.
Used in your eclipse.ini a path like:
-vm
C:/Prog/Java/jdk1.6.0_21/jre/bin/server/jvm.dll

Do you have the 64-bit version of Java? http://www.java.com/en/download/faq/java_win64bit.xml

I experienced relatively little trouble moving to 64-bit java:
Download Eclipse Helios 64-bit version
Download Java 6 SDK 64-bit version
Install both
Run
The issues may arise if you have both 32-bit and 64-bit JDKs in the same machine. If you want to explicitly run Eclipse with one JVM, then you need to specify its full path in eclipse.ini.
e.g.
-vm
C:/Program Files/Java/jdk1.6.0_20/bin/javaw.exe
Where the path points to the 64-bit version.
The other issue I encountered after moving is that the Subclipse plugin by default uses a 32-bit DLL backend and therefore doesn't work. However Subclipse also works with a pure-Java back-end for Eclipse called JavaHL which solved that issue.

I faced similar problem and did not know how to proceed.
I did following things to resolve it.
In eclipse.ini enter the vm argument to which jre you want to use
-vm
C:\Java\jdk1.7\jre\bin\javaw.exe
If you have -Dosgi.requiredJavaVersion=1.7 line in your eclipse
make sure that version is matching the one that is mentione in step 1.
( in my case it was 1.6 and I had to change this value to 1.7)
Launch eclipse.exe from the command line