One solution would be to create a Calendar instance, and start a cycle, increasing it's Calendar.DATE field until it reaches the desired date. Also, on each step you should create a Date instance (with corresponding parameters), and put it to your list.

Some dirty code:

    public List<Date> getDatesBetween(final Date date1, final Date date2) {
List<Date> dates = new ArrayList<Date>();


Calendar calendar = new GregorianCalendar() \{\{
set(Calendar.YEAR, date1.getYear());
set(Calendar.MONTH, date1.getMonth());
set(Calendar.DATE, date1.getDate());
}};


while (calendar.get(Calendar.YEAR) != date2.getYear() && calendar.get(Calendar.MONTH) != date2.getMonth() && calendar.get(Calendar.DATE) != date2.getDate()) {
calendar.add(Calendar.DATE, 1);
dates.add(new Date(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DATE)));
}


return dates;
}

You can also look at the Date.getTime() API. That gives a long to which you can add your increment. Then create a new Date.

List<Date> dates = new ArrayList<Date>();
long interval = 1000 * 60 * 60; // 1 hour in millis
long endtime = ; // create your endtime here, possibly using Calendar or Date
long curTime = startDate.getTime();
while (curTime <= endTime) {
dates.add(new Date(curTime));
curTime += interval;
}

and maybe apache commons has something like this in DateUtils, or perhaps they have a CalendarUtils too :)

EDIT

including the start and enddate may not be possible if your interval is not perfect :)

Back in 2010, I suggested to use Joda-Time for that.

Note that Joda-Time is now in maintenance mode. Since 1.8 (2014), you should use java.time.

Add one day at a time until reaching the end date:

int days = Days.daysBetween(startDate, endDate).getDays();
List<LocalDate> dates = new ArrayList<LocalDate>(days);  // Set initial capacity to `days`.
for (int i=0; i < days; i++) {
LocalDate d = startDate.withFieldAdded(DurationFieldType.days(), i);
dates.add(d);
}

It wouldn't be too hard to implement your own iterator to do this as well, that would be even nicer.

Get the number of days between dates, inclusive.

public static List<Date> getDaysBetweenDates(Date startdate, Date enddate)
{
List<Date> dates = new ArrayList<Date>();
Calendar calendar = new GregorianCalendar();
calendar.setTime(startdate);


while (calendar.getTime().before(enddate))
{
Date result = calendar.getTime();
dates.add(result);
calendar.add(Calendar.DATE, 1);
}
return dates;
}

please find the below code.

List<Date> dates = new ArrayList<Date>();


String str_date ="27/08/2010";
String end_date ="02/09/2010";


DateFormat formatter ;


formatter = new SimpleDateFormat("dd/MM/yyyy");
Date  startDate = (Date)formatter.parse(str_date);
Date  endDate = (Date)formatter.parse(end_date);
long interval = 24*1000 * 60 * 60; // 1 hour in millis
long endTime =endDate.getTime() ; // create your endtime here, possibly using Calendar or Date
long curTime = startDate.getTime();
while (curTime <= endTime) {
dates.add(new Date(curTime));
curTime += interval;
}
for(int i=0;i<dates.size();i++){
Date lDate =(Date)dates.get(i);
String ds = formatter.format(lDate);
System.out.println(" Date is ..." + ds);
}

output:

Date is ...27/08/2010
Date is ...28/08/2010
Date is ...29/08/2010
Date is ...30/08/2010
Date is ...31/08/2010
Date is ...01/09/2010
Date is ...02/09/2010

With Joda-Time , maybe it's better:

LocalDate dateStart = new LocalDate("2012-01-15");
LocalDate dateEnd = new LocalDate("2012-05-23");
// day by day:
while(dateStart.isBefore(dateEnd)){
System.out.println(dateStart);
dateStart = dateStart.plusDays(1);
}

It's my solution.... very easy :)

List<Date> dates = new ArrayList<Date>();
String str_date = "DD/MM/YYYY";
String end_date = "DD/MM/YYYY";
DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
Date startDate = (Date)formatter.parse(str_date);
Date endDate = (Date)formatter.parse(end_date);
long interval = 1000 * 60 * 60; // 1 hour in milliseconds
long endTime = endDate.getTime() ; // create your endtime here, possibly using Calendar or Date
long curTime = startDate.getTime();


while (curTime <= endTime) {
dates.add(new Date(curTime));
curTime += interval;
}
for (int i = 0; i < dates.size(); i++){
Date lDate = (Date)dates.get(i);
String ds = formatter.format(lDate);
System.out.println("Date is ..." + ds);
//Write your code for storing dates to list
}

Like as @folone, but correct

private static List<Date> getDatesBetween(final Date date1, final Date date2) {
List<Date> dates = new ArrayList<>();
Calendar c1 = new GregorianCalendar();
c1.setTime(date1);
Calendar c2 = new GregorianCalendar();
c2.setTime(date2);
int a = c1.get(Calendar.DATE);
int b = c2.get(Calendar.DATE);
while ((c1.get(Calendar.YEAR) != c2.get(Calendar.YEAR)) || (c1.get(Calendar.MONTH) != c2.get(Calendar.MONTH)) || (c1.get(Calendar.DATE) != c2.get(Calendar.DATE))) {
c1.add(Calendar.DATE, 1);
dates.add(new Date(c1.getTimeInMillis()));
}
return dates;
}

Something like this should definitely work:

private List<Date> getListOfDaysBetweenTwoDates(Date startDate, Date endDate) {
List<Date> result = new ArrayList<Date>();
Calendar start = Calendar.getInstance();
start.setTime(startDate);
Calendar end = Calendar.getInstance();
end.setTime(endDate);
end.add(Calendar.DAY_OF_YEAR, 1); //Add 1 day to endDate to make sure endDate is included into the final list
while (start.before(end)) {
result.add(start.getTime());
start.add(Calendar.DAY_OF_YEAR, 1);
}
return result;
}

java.time Package

If you are using Java 8, there is a much cleaner approach. The new java.time package in Java 8 incorporates the features of the Joda-Time API.

Your requirement can be solved using the below code:

String s = "2014-05-01";
String e = "2014-05-10";
LocalDate start = LocalDate.parse(s);
LocalDate end = LocalDate.parse(e);
List<LocalDate> totalDates = new ArrayList<>();
while (!start.isAfter(end)) {
totalDates.add(start);
start = start.plusDays(1);
}

With Lamma it looks like this in Java:

    for (Date d: Dates.from(2014, 6, 29).to(2014, 7, 1).build()) {
System.out.println(d);
}

and the output is:

    Date(2014,6,29)
Date(2014,6,30)
Date(2014,7,1)

A tail-recursive version:

public static void datesBetweenRecursive(Date startDate, Date endDate, List<Date> dates) {
if (startDate.before(endDate)) {
dates.add(startDate);
Calendar calendar = Calendar.getInstance();
calendar.setTime(startDate);
calendar.add(Calendar.DATE, 1);
datesBetweenRecursive(calendar.getTime(), endDate, dates);
}
}

Enhancing one of the above solutions. As adding 1 day to end date sometimes adds an extra day beyond the end date.

public static List getDaysBetweenDates(Date startdate, Date enddate)
{
List dates = new ArrayList();
Calendar startDay = new GregorianCalendar();
calendar.setTime(startdate);
Calendar endDay = new GregorianCalendar();
endDay.setTime(enddate);
endDay.add(Calendar.DAY_OF_YEAR, 1);
endDay.set(Calendar.HOUR_OF_DAY, 0);
endDay.set(Calendar.MINUTE, 0);
endDay.set(Calendar.SECOND, 0);
endDay.set(Calendar.MILLISECOND, 0);


while (calendar.getTime().before(endDay.getTime())) {
Date result = startDay.getTime();
dates.add(result);
startDay.add(Calendar.DATE, 1);
}
return dates;
}

Here is my method for getting dates between two dates, including / w.o. including business days. It also takes source and desired date format as parameter.

public static List<String> getAllDatesBetweenTwoDates(String stdate,String enddate,String givenformat,String resultformat,boolean onlybunessdays) throws ParseException{
DateFormat sdf;
DateFormat sdf1;
List<Date> dates = new ArrayList<Date>();
List<String> dateList = new ArrayList<String>();
SimpleDateFormat checkformat = new SimpleDateFormat(resultformat);
checkformat.applyPattern("EEE");  // to get Day of week
try{
sdf = new SimpleDateFormat(givenformat);
sdf1 = new SimpleDateFormat(resultformat);
stdate=sdf1.format(sdf.parse(stdate));
enddate=sdf1.format(sdf.parse(enddate));


Date  startDate = (Date)sdf1.parse( stdate);
Date  endDate = (Date)sdf1.parse( enddate);
long interval = 24*1000 * 60 * 60; // 1 hour in millis
long endTime =endDate.getTime() ; // create your endtime here, possibly using Calendar or Date
long curTime = startDate.getTime();
while (curTime <= endTime) {
dates.add(new Date(curTime));
curTime += interval;
}
for(int i=0;i<dates.size();i++){
Date lDate =(Date)dates.get(i);
String ds = sdf1.format(lDate);
if(onlybunessdays){
String day= checkformat.format(lDate);
if(!day.equalsIgnoreCase("Sat") && !day.equalsIgnoreCase("Sun")){
dateList.add(ds);
}
}else{
dateList.add(ds);
}


//System.out.println(" Date is ..." + ds);


}




}catch(ParseException e){
e.printStackTrace();
throw e;
}finally{
sdf=null;
sdf1=null;
}
return dateList;
}

And the method call would be like :

public static void main(String aregs[]) throws Exception {
System.out.println(getAllDatesBetweenTwoDates("2015/09/27","2015/10/05","yyyy/MM/dd","dd-MM-yyyy",false));
}

You can find the demo code : Click Here

Streams

Edit: Joda-Time is now deprecated, changed the answer to use Java 8 instead.

Here is the Java 8 way, using streams.

List<LocalDate> daysRange = Stream.iterate(startDate, date -> date.plusDays(1)).limit(numOfDays).collect(Collectors.toList());

 public static List<Date> getDaysBetweenDates(Date startDate, Date endDate){
ArrayList<Date> dates = new ArrayList<Date>();
Calendar cal1 = Calendar.getInstance();
cal1.setTime(startDate);


Calendar cal2 = Calendar.getInstance();
cal2.setTime(endDate);


while(cal1.before(cal2) || cal1.equals(cal2))
{
dates.add(cal1.getTime());
cal1.add(Calendar.DATE, 1);
}
return dates;
}

With java 8

public Stream<LocalDate> getDaysBetween(LocalDate startDate, LocalDate endDate) {
return IntStream.range(0, (int) DAYS.between(startDate, endDate)).mapToObj(startDate::plusDays);
}

Recommending date streams

In Java 9, you can use following new method, LocalDate::datesUntil:

LocalDate start = LocalDate.of(2017, 2, 1);
LocalDate end = LocalDate.of(2017, 2, 28);


Stream<LocalDate> dates = start.datesUntil(end.plusDays(1));
List<LocalDate> list = dates.collect(Collectors.toList());

The new method datesUntil(...) works with an exclusive end date, hence the shown hack to add a day.

Once you have obtained a stream you can exploit all the features offered by java.util.stream- or java.util.function-packages. Working with streams has become so simple compared with earlier approaches based on customized for- or while-loops.

Or if you look for a stream-based solution which operates on inclusive dates by default but can also be configured otherwise then you might find the class DateInterval in my library Time4J interesting because it offers a lot of special features around date streams including a performant spliterator which is faster than in Java-9:

PlainDate start = PlainDate.of(2017,  2, 1);
PlainDate end = start.with(PlainDate.DAY_OF_MONTH.maximized());
Stream<PlainDate> stream = DateInterval.streamDaily(start, end);

Or even simpler in case of full months:

Stream<PlainDate> februaryDates = CalendarMonth.of(2017, 2).streamDaily();
List<LocalDate> list =
februaryDates.map(PlainDate::toTemporalAccessor).collect(Collectors.toList());

List<LocalDate> totalDates = new ArrayList<>();
popularDatas(startDate, endDate, totalDates);
System.out.println(totalDates);


private void popularDatas(LocalDate startDate, LocalDate endDate, List<LocalDate> datas) {
if (!startDate.plusDays(1).isAfter(endDate)) {
popularDatas(startDate.plusDays(1), endDate, datas);
}
datas.add(startDate);
}

Recursive solution

This is simple solution for get a list of dates

import java.io.*;
import java.util.*;
import java.text.SimpleDateFormat;
public class DateList
{


public static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");


public static void main (String[] args) throws java.lang.Exception
{


Date dt = new Date();
System.out.println(dt);


List<Date> dates = getDates("2017-01-01",dateFormat.format(new Date()));
//IF you don't want to reverse then remove Collections.reverse(dates);
Collections.reverse(dates);
System.out.println(dates.size());
for(Date date:dates)
{
System.out.println(date);
}
}
public static List<Date> getDates(String fromDate, String toDate)
{
ArrayList<Date> dates = new ArrayList<Date>();


try {


Calendar fromCal = Calendar.getInstance();
fromCal.setTime(dateFormat .parse(fromDate));


Calendar toCal = Calendar.getInstance();
toCal.setTime(dateFormat .parse(toDate));


while(!fromCal.after(toCal))
{
dates.add(fromCal.getTime());
fromCal.add(Calendar.DATE, 1);
}




} catch (Exception e) {
System.out.println(e);
}
return dates;
}
}

This will add all dates between two dates and It will add current dates and then new dates will be added based on loop condition.

private void onDateSet(){
Calendar endDate = Calendar.getInstance(),startDate = Calendar.getInstance();
startDate.set(currentYear,currentMonthOfYear,currentDayOfMonth);
endDate.set(inputYear,inputMonthOfYear,inputDayOfMonth);
datesToAdd(startDate,endDate);
}


//call for get dates list
private List<Date> datesToAdd(Calendar startDate,Calendar endDate){
List<Dates> datesLists = new List<>();
while (startDate.get(Calendar.YEAR) != endDate.get(Calendar.YEAR) ||
startDate.get(Calendar.MONTH) != endDate.get(Calendar.MONTH) ||
startDate.get(Calendar.DAY_OF_MONTH) != endDate.get(Calendar.DAY_OF_MONTH)) {


datesList.add(new Date(startDate.get(Calendar.YEAR), startDate.get(Calendar.MONTH), startDate.get(Calendar.DATE));


startDate.add(Calendar.DATE, 1);//increas dates


}
return datesList;
}

As of Java 9, you can use the datesUntil method on LocalDate:

public List<LocalDate> getDatesBetween(
LocalDate startDate, LocalDate endDate) {
  

return startDate.datesUntil(endDate)
.collect(Collectors.toList());
}

The LocalDateRange class in the ThreeTen-Extra library represents a range of dates, and can be used for this purpose:

LocalDateRange.ofClosed(startDate, endDate).stream().toList();