Steps for the ExampleGame Developer (Terry)

The steps Terry would take, after creating a game (ExampleGame ) that calls the HighScore getHighScore and setHighScore methods to get and set, respectively, the user's high scores, are:

Compile the Game Class

javac ExampleGame.java -classpath hs.jar -d .

Place its class file in a JAR File

jar cvf terry.jar com/gamedev/games/ExampleGame.class

Create a Keystore and Keys for Signing

keytool -genkey -keystore terry.keystore -alias signTJars

Sign the JAR File

jarsigner -keystore terry.keystore terry.jar signTJars

Export the Public Key Certificate

keytool -export -keystore terry.keystore
    -alias signTJars -file Terry.cer

Supply Files and Information Needed by Users

• the signed JAR File terry.jar,

• the public key certificate file Terry.cer, and

• information as to the permissions the ExampleGame class needs. For this, Terry could supply the exact grant entry needed.

• the signed JAR File hs.jar,

• the public key certificate file Chris.cer, and

• information as to the permissions the HighScore and HighScorePermission classes must be granted in a policy file in order to work. This could be the exact grant entry needed.