日々の破片

_ 昨日のバグの続き

import java.util.*;
...
Calendar c0 = Calendar.getInstance();
Calendar c1 = new GregorianCalendar(c0.get(Calendar.YEAR), c0.get(Calendar.MONTH), c0.get(Calendar.DATE));
c0.set(Calendar.HOUR, 0);
c0.set(Calendar.MINUTE, 0);
c0.set(Calendar.SECOND, 0);
c0.set(Calendar.MILLISECOND, 0);
if (c0.getTimeInMillis() == c1.getTimeInMillis()) {
    System.out.println("午前だよ");
} else {
    System.out.println("午後だよ");
}