test.java

这是我自己参考资料写了一个java定时器

package dark.timer.test;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * @author Administrator
 */
public class Test
{

	public static void main(String[] args)
	{
		SimpleDateFormat dateFormat =
			new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

		Calendar c = Calendar.getInstance();

		System.out.println("It's " + dateFormat.format(new Date()));

		System.out.println("Calendar.getTime()=" + dateFormat.format(c.getTime()));
//		c.add(Calendar.WEEK_OF_YEAR, -1);
//		System.out.println("Calendar.getTime()=" + dateFormat.format(c.getTime()));
//		c.add(Calendar.WEEK_OF_YEAR, 2);
//		System.out.println("Calendar.getTime()=" + dateFormat.format(c.getTime()));
//		c.add(Calendar.MONTH, -1);
		System.out.println("c.get( Calendar.DAY_OF_MONTH)=" + c.get( Calendar.DAY_OF_MONTH));
		System.out.println("c.get( Calendar.DAY_OF_YEAR)=" + c.get( Calendar.DAY_OF_YEAR));		
				
	}
}