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Java tutorials

391 tutorials

Java2007-12-06

Getting Started with Java

If you are familiar with C then Java should be very familiar to you in terms of syntax. If you are a C++ programmer the Java will be easier still since Java is also purely an Objec

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Java2007-12-06

What is Java?

A search on 'What is Java' in google returns roughly about a trillion pages. That is the popularity of Java on the web. If you haven't read the history of Java please read it first

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Java2007-12-06

History of Java

It is always a good practice to know a little bit of history and background of any technology before starting to actually use it. In fact Java has nothing to do with the 'Island Ja

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Java2007-12-03

Applet Notinited : Applet xxxxxxxxxxxx notinited

Applet notinited is a message that appears on the status bar of your IE whenever there is a mismatch in the JRE versions in your PC compared to the applet's java version that you a

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Java2007-10-14

Importing Keystore example using keytool in Java

The command importkeystore is used to import an entire keystore into another keystore, which means all entries from the source keystore, including keys and certificates, are all im

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Java2007-10-14

Exporting a Certificate Authenticating Your Public Key example using keytool in Java

Suppose you have used the jarsigner tool to sign a Java ARchive (JAR) file. Clients that want to use the file will want to authenticate your signature.

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Java2007-10-14

Importing the Certificate Reply from the CA example using keytool in Java

Once you've imported a certificate authenticating the public key of the CA you submitted your certificate signing request to (or there's already such a certificate in the "cacerts"

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Java2007-10-14

Importing a Certificate for the CA example using keytool in Java

You need to replace your self-signed certificate with a certificate chain, where each certificate in the chain authenticates the public key of the signer of the previous certificat

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Java2007-10-14

Requesting a Signed Certificate from a Certification Authority example using keytool in Java

So far all we've got is a self-signed certificate. A certificate is more likely to be trusted by others if it is signed by a Certification Authority (CA). To get such a signature,

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Java2007-10-14

Generating Your Key Pair example using keytool in Java

The first thing you need to do is create a keystore and generate the key pair. You could use a command such as the following:

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Java2007-10-14

Verifying a Signed JAR File example

To verify a signed JAR file, that is, to verify that the signature is valid and the JAR file has not been tampered with, use a command such as the following: jarsigner -verify sbun

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Java2007-10-14

Signing a jar file example

Suppose you have a JAR file named bundle.jar and you'd like to sign it using the private key of the user whose keystore alias is jane in the keystore named mystore in the working d

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