>>372
public class Greeting
{
public static void main(String[] args)
{
int hour = java.util.Calendar.getInstance().get(java.util.Calendar.HOUR_OF_DAY);
if (5 <= hour && hour < 12)
{
System.out.println("おはよう");
}
else if (12 <= hour && hour < 16)
{
System.out.println("こんにちは");
}
else
{
System.out.println("こんばんは");
}
}
}