The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.
See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
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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:
javac ExampleGame.java -classpath hs.jar -d .
jar cvf terry.jar com/gamedev/games/ExampleGame.class
keytool -genkey -keystore terry.keystore -alias signTJars
Specify whatever you want for the passwords and distinguished name information.
jarsigner -keystore terry.keystore terry.jar signTJars
keytool -export -keystore terry.keystore -alias signTJars -file Terry.cer
That is, supply them
terry.jar,
Terry.cer
, andExampleGame
class needs. For this, Terry could supply the exact grant entry needed.Game users also need files and information from Chris. For their convenience, Terry may forward this information to them:
hs.jar
,Chris.cer
, andHighScore
and HighScorePermission
classes must be granted in a policy file in order to work. This could be the exact grant entry needed.