How to get the current date time in Java

Calendar cal = Calendar.getinstance ();
Java.text.SimpleDateFormat SDF = new SimpleDateFormat ("yyyy");
String CDate = Sdf.format (Cal.gettime ());

1. With Java.util.Calendar
Calendar CA = Calendar.getinstance ();
Date now = Ca.gettime ();
Ca.add (Calendar.day_of_month, 7);
Date fu = ca.gettime ();
Fu is a date 7 days from now.
2. In addition, the current time can be obtained with the new date (), but it does not seem to advocate the Date type of the new Java.util.Date ().

A small program that displays the system date:

Import java.awt.*;
Import java. applet.*;
Import java.util.*;

public class Showtimeapplet extends applet{
Calendar calcurrent=calendar.getinstance ();
TextArea txadate=new TextArea (5,20);
int Intday=calcurrent.get (calendar.date);
int Intmonth=calcurrent.get (calendar.month) +1;
int Intyear=calcurrent.get (calendar.year);

public void init () {
Add (txadate);
Txadate.append (intyear+ "-" +intmonth+ "-" +intday);

}

Java Display current date time

Import java.util.*;
public class Calendar
{
public static void Main (string[] args)
{
GregorianCalendar calendar=new GregorianCalendar ();
Take out the current year, month, day
int Year=calendar.get (Calendar. year);

The value of the month plus 1 makes it the customary month size (January-December)
int Month=calendar.get (Calendar. MONTH) +1;
int Today=calendar.get (Calendar. Day_of_month);

Output format sample for the current year, month, Day and week
System.out.println ("+year+"/"+month+"/"+today+");
System.out.println ();
System.out.println ("Sun Mon Tue Wed Thu Sat"); Two spaces in the middle

Set the calendar to display from the 1th current month and view the day of the one week
Calendar.set (Calendar. day_of_month,1);
int Weekday=calendar.get (Calendar. Day_of_week);

Align number 1th to the corresponding week
for (int I=calendar. Sunday;i System.out.print (""); 5 spaces in the middle
int day,month;
Using the Do-while loop to implement the output of the calendar
do{
Day=calendar.get (Calendar. Day_of_month);
System.out.print (day);

/* Date is today more output a "*" for identification, the date is not today to determine whether less than 10,
Output a certain space. This is primarily to align the formatting. */
if (day==today)
{
System.out.print ("*");
if (day<10) System.out.print ("");
}
else if (day<10) System.out.print ("");
else System.out.print ("");
Weekday=calendar.get (Calendar. Day_of_week);

According to the format requirements, Saturday to change lines. If you do not wrap, the output of a certain space
if (Weekday==calendar. SATURDAY) System.out.println ();
else System.out.print ("");

Calendar.add (Calendar. day_of_week,1);
Month=calendar.get (Calendar. MONTH) +1;
}
while (month==month);//If Month exceeds the current month, exit the loop,
System.out.println ();
System.out.println ();
}