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Home/ Questions/Q 5955259
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Editorial Team
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Editorial Team
Asked: May 22, 20262026-05-22T18:05:18+00:00 2026-05-22T18:05:18+00:00

I have not set java_home and I need to know where the c:\Windows\System32\java.exe file

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I have not set java_home and I need to know where the c:\Windows\System32\java.exe file points to.
I have several JDKs and JREs on my system.

The reason is that I am trying to connect via SSL to some server and it works in Netbeans after I export the certificate in the appropriate JRE (which I can see via Netbeans options)

However, when I connect via command-line, I get an SSL error. I tried adding the certificate to all my JREs but I cannot get it to work. I think it is a problem that this Windows shortcut points to some place I overlooked.

Is there an easy way to find out which JRE is the default one?

[EDIT] Or rather I need to find the location of the default keystore in the default JRE.

[EDIT] My problem is elaborated below:

the following two give SSL error:

"c:\Program Files\Java\jre6\bin\java.exe" -cp myjar.jar mypackage.myclass 
"c:\Program Files (x86)\Java\jre6\bin\java.exe" -cp myjar.jar mypackage.myclass 

The following two work

"c:\Program Files\Java\jdk1.6.0_24\bin\bin\java.exe" -cp myjar.jar mypackage.myclass 
"c:\Program Files (x86)\jdk1.6.0_24\bin\jre6\bin\java.exe" -cp myjar.jar mypackage.myclass 

I have exported the certificate using all four commands:

"c:\Program Files\Java\jdk1.6.0_24\bin\bin\keytool.exe" -import -alias myalias -file mycertfile
"c:\Program Files (x86)\Java\jdk1.6.0_24\bin\bin\keytool.exe" -import -alias myalias -file mycertfile
"c:\Program Files\Java\jre6\bin\bin\keytool.exe" -import -alias myalias -file mycertfile
"c:\Program Files (x86)\Java\jre6\bin\bin\keytool.exe" -import -alias myalias -file mycertfile

So it seems that the keytool uses a different store than java.exe.

would appreciate some help on this.

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  1. Editorial Team
    Editorial Team
    2026-05-22T18:05:18+00:00Added an answer on May 22, 2026 at 6:05 pm

    I found the solution. Thanks to this link.

    It mentioned the location of the keystore. Surprisingly it took a bit of Googling.

    The location is jre6\lib\security\cacerts

    so I had to use the following command to import the certificate:

     keytool.exe -import -alias myalias -file mycertfile -keystore "c:\Program Files\Java\jre6\lib\security\cacerts"
    
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