java compare dates

Date has before and after methods and can be compared to each other as follows: if(todayDate.after(historyDate) && todayDate.before(futureDate)) { // In between } For an inclusive comparison: if(!historyDate.after(todayDate) && !futureDate.before(todayDate)) { /* historyDate <= todayDate <= futureDate */ } You could also give Joda-Time a go, but note that: Joda-Time is the de facto standard date and time library for Java prior to Java SE 8. Users are now asked to migrate to java.time (JSR-310). Back-ports are available for Java 6 and 7 as well as Android.

for ( Map.Entry<DayOfWeek , LocalTime> entry : dayToTimeMap.entrySet () ) { DayOfWeek key = entry.getKey (); LocalTime value = entry.getValue (); int comparison = key.compareTo ( today ); if ( comparison < 0 ) { // if earlier day… earlier.add ( key ); } else if ( comparison == 0 ) { //If same day… if ( value.isBefore ( now ) ) { earlier.add ( key ); } else { // Else same time as now or later than now… later.add ( key ); } } else if ( comparison > 0 ) { later.add ( key ); } else { throw new RuntimeException ( "Unexpectedly reached IF-ELSE for comparison: " + comparison ); } }

How to compare two string dates with different date formats in Java

package javaapplication;

import java.text.*;
import java.util.Date;
import java.text.ParseException;

public class date {

    public static void main(String[] args) {

        String startDate = "21-08-2027";
        String endDate = "21/08/2021";

        try {

            Date dateStart = new SimpleDateFormat("dd-MM-yyyy").parse(startDate);

            Date dateEnd = new SimpleDateFormat("dd/MM/yyyy").parse(endDate);

            if (dateStart.after(dateEnd)) {
                System.out.println("Start Date is greater than End Date");

            } else if (dateStart.before(dateEnd)) {

                System.out.println("Start Date is less than End Date");

            } else {

                System.out.println("Start Date is Equal to End Date");
            }

        } catch (ParseException e) {
            e.printStackTrace();
        }

    }
}

Posted by: Guest on October-03-2021

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