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问题:
I get this error when I try to do anything with Java in command prompt:
Error opening registry key 'Software\JavaSoft\Java Runtime Environment.3' Error: could not find Java.dll Error: could not find Java 2 Runtime Environment
I did screw around with deleting Java directories and registry a few days ago. I restarted computer and java was still working fine, then i restarted it again today and now I get this error. I have tried uninstalling and reinstalling but that doesn't seem to work. I have the latest java JRE installed and the path set in the environment variables. Anyone have any clue how to fix this?
回答1:
Make sure you remove any java.exe, javaw.exe and javaws.exe from your Windows\System32 folder and if you have an x64 system (Win 7 64 bits) also do the same under Windows\SysWOW64.
回答2:
I had a similar problem. I had installed JDK7 update 1 but couldn't use it (probably because I found a JRE6 that I deleted after installing JDK7). Uninstalling JDK7 was impossible. The solution was to add the JRE registry entries by hand.
[HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment] "CurrentVersion"="1.7" [HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.7] "JavaHome"="C:\\Program Files\\Java\\jre7" "RuntimeLib"="C:\\Program Files\\Java\\jre7\\bin\\client\\jvm.dll" [HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.7.0_01] "JavaHome"="C:\\Program Files\\Java\\jre7" "RuntimeLib"="C:\\Program Files\\Java\\jre7\\bin\\client\\jvm.dll"
You'll have to adjust the above to your own directories and version.
If this doesn't help, there's still JavaRa http://raproducts.org/wordpress/ .
回答3:
Make sure you remove any java.exe, javaw.exe and javaws.exe from your system.
回答4:
I would have tagged this as a comment but cant (dont have the rep) just wanted to thank Tilman. I was trying to get PDFsam (PDF Split and Merge) to work to no avail.
At launch it would produce an error stating that it could not find JRE 1.6.0. I Have both 32 and 64 bit versions and they check out fine at the java website in their respective browsers.
Tried uninstalling/reinstalling and rebooting repeatedly as well as using JavaRa. No such luck, still no go.
I looked in the registry after reading this post and there was no ...\SOFTWARE\JavaSoft\ key so I added each with their respective string values pointing to my x86 version (PDFsam is a 32bit program). This got past the first problem but an error popped up about amd64 libraries suggesting the machine wanted to run the 64bit version. So I changed the paths to the 64bit JRE and PDFsam now works.
FYI - I got here by searching for Java registry keys after I was unable to launch javaw.exe from command prompt (even after adding the requisite paths to system path), making the aforementioned changes solved this as well.
回答5:
In case a virus scanner (like McAfee) is running, try:
- Disable virus scanner
- Uninstall Java (via Control Panel / Programs and Features)
- Reinstall Java (from Java.com)
- Re-enable virus scanner
回答6:
Uninstall Java (via Control Panel / Programs and Features)
Install Java JRE 7 --> OFFLINE %JAVA_HOME%/bin;%PATH%
回答7:
I got this kind of error whe nI had JDK 1.7 before and I installed JAVA JDK 1.8 and pointed my JAVA_HOME and PATH variables to JAVA 1.8 version. When I try to find the java version I got this error. I restarted my machine, and it works . It seems to be we have to restart the machine after modifying the environment variables.
