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How to extract Private key from keystore entry using keytool ?

How may I extract just the private key from the keystore entry of a public/private key pair originally generated by keytool -genkey ?I know how to extract the certificate (-export), but my understanding is that is only the public key.Thanks for help.
[271 byte] By [BCScomputersTXa] at [2007-11-27 5:01:58]
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# 1
What do you mean "extract"? to which format?As I know, the best you can do is to use the new JDK 6 function "keytool -importkeystore" to export a whole privateKeyEntry to another keystore (can be another store type, say, pkcs12).
wangwja at 2007-7-12 10:19:41 > top of Java-index,Security,Java Secure Socket Extension (JSSE)...
# 2
No, I just want to extract to disk a copy of the private key ... out of the private/public key pair written into my keystore when I use keytool -genkey to generate a keystore entry.As to format ... either binary or RFC ... probably preferring RFC.
BCScomputersTXa at 2007-7-12 10:19:41 > top of Java-index,Security,Java Secure Socket Extension (JSSE)...
# 3

Well, yes, exporting a PrivateKeyEntry to a PKCS12 keystore does save (or, backup) your keypair as a copy on your disk, and it's quite a standard format. In fact, quite a lot of people get their keypair this way, and they can run -importkeystore to import (for you, restore) it into their JKS keystore.

wangwja at 2007-7-12 10:19:41 > top of Java-index,Security,Java Secure Socket Extension (JSSE)...
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