Code Examples of Median
public static double getMedianTestScore(int testID)
throws SQLException
{
Logger
log = Logger.getLogger();
boolean
loggingEnabled = log.isLoggingEnabled();
Median
median = new Median();
ArrayList
arraylist = new ArrayList();
Connection
conn = getDefaultConnection();
try {
log.enableLogging( false );
PreparedStatement
ps = Utils.prepare
(
conn,
“select tk.score\n” +
“from TestTaking tk, LastTaking lt\n” +
“where tk.takingID = lt.takingID\n” +
“and tk.testID = ?\n”
);
ps.setInt( 1, testID );
ResultSet
rs = ps.executeQuery();
while( rs.next() )
{
arraylist.add(new Double(rs.getDouble(1)));
}
Utils.close(rs);
Utils.close(ps);
}
finally
{
log.enableLogging( loggingEnabled );
}
int
count = arraylist.size();
double
values[] = new double[ count ];
for ( int i = 0; i < count; i++){ values[ i ] = ((Double)arraylist.get(i)).doubleValue(); }return median.evaluate( values );}/***
* Format a double as a percentage, suitable for printing.
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