根据日期如何得出该日期是星期几

根据日期如何得出该日期是星期几

import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Calendar;

public class Week {

public static void main(String[] args) {
Calendar c = Calendar.getInstance();

Format f = new SimpleDateFormat("yyyy-MM-dd(E) HH:mm:ss");

System.out.println(f.format(c.getTime()));
System.out.println(c.get(Calendar.DAY_OF_WEEK));
}

}

Format f = new SimpleDateFormat("E");

String actStart = "2015-08-13 19:00:00";

public  Date convertStringToDate6(String strDate) {
Date date = null;
try {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
date = df.parse(strDate);

} catch (Exception e) {
System.out.println("日期转换失败:" + e.getMessage());
}
return date;
}