Categories: Java | Java ME | How To | Code Examples | Files/Data

This page was last modified 09:06, 27 November 2007.

From Forum Nokia Wiki

Every game should have a high score system to allow gamers to challenge other gamers or themselves.

Java ME use Record Management System (RMS) to allows developers to save and restore data over differents application sessions. So, for creating a quick Hiscore system saving name of the user and points, you can use the following code.

// We open the recordstore
RecordStore highscore = RecordStore.openRecordStore("High Score", true);
 
// To add a new HiScore we use a quick string comma-separated
String str = new String("John,3400");
byte [] strb = str.getBytes();
Int id = hiscore.addRecord(strb, 0, strb.length);
 
// To read all hiscores saved on the RMS
RecordEnumeration enum = highscore.enumerateRecords(null, null, false);
int id;
bytes [] record;
String str;
while (enum.hasNextElement( )) {
     id = enum.nextRecordId( );
     record = enum.getRecord(id);
     str = new String(record);
     // Operate with str to extract name and points
}
 
highscore.close();

You should use try-catch sentences to catch exceptions on the I/O operation or make a throws.