Java 8 LocalDate By Example

Java Util Date is Past, Now is a new Era, Java Time is a Future, my teacher say like that

Java 8 come with the new Api for Date. LocalDate is an immutable date-time object that represents a date, often viewed as year-month-day. Other date fields, such as day-of-year, day-of-week and week-of-year, can also be accessed. For example, the value “2nd October 2007” can be stored in a LocalDate.

Let’s see this code, how to use LocalDate

import java.time.LocalDate;
import java.time.Month;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoField;
import java.time.temporal.ChronoUnit;

public class LocalDateMain {

    @SuppressWarnings("deprecation")
    public static void main(String[] args) {
                LocalDate localDate=LocalDate.now();
                LocalDate ld=LocalDate.now().minusDays(4);
                System.out.println("Local date\t\t\t: "+localDate);
                System.out.println("Local Date Minus 4 Days\t\t: "+ld);
                System.out.println("Chronology\t\t\t: "+localDate.getChronology());
                System.out.println("Day of Month\t\t\t: "+localDate.getDayOfMonth());
                System.out.println("Day of Week\t\t\t: "+localDate.getDayOfWeek());
                System.out.println("Day of Year\t\t\t: "+localDate.getDayOfYear());
                System.out.println("Era\t\t\t\t: "+localDate.getEra());
                System.out.println("Month\t\t\t\t: "+localDate.getMonth());
                System.out.println("Month Value\t\t\t: "+localDate.getMonthValue());
                System.out.println("Year\t\t\t\t: "+localDate.getYear());
                System.out.println(localDate+" Is After "+ld +"\t: "+localDate.isAfter(ld));
                System.out.println(localDate+" Is Before "+ld +"\t: "+localDate.isBefore(ld));
                System.out.println(localDate+" Is Equals "+ld+"\t: "+localDate.equals(ld));
                System.out.println("Is Leap Year\t\t\t: "+localDate.isLeapYear());
                System.out.println("Now :"+ LocalDate.now()+" Is Leaf Year : 2016-02-02 :"+LocalDate.of(2016, 02, 02).isLeapYear());
                System.out.println("Is Supported TemporalField \t: "+localDate.isSupported(ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH));
                System.out.println("Is Supported TemporalUnit \t: "+localDate.isSupported(ChronoUnit.CENTURIES));
                System.out.println("Length of Month ("+localDate+")\t: "+localDate.lengthOfMonth());
                System.out.println("Length of Year ("+localDate+")\t: "+localDate.lengthOfYear());
                System.out.println(localDate+" Minus one Day\t: "+localDate.minus(1, ChronoUnit.DAYS));
                System.out.println(localDate+" Minus one Day\t: "+localDate.minusDays(1)+"\t//Using minusDays(long)");
                System.out.println(localDate+" Minus One Month\t: "+localDate.minus(1,ChronoUnit.MONTHS));
                System.out.println(localDate+" Minus One Months\t: "+localDate.minusMonths(1)+"\t//Using minusMonths(long)");
                System.out.println(localDate+" Minus One Year\t: "+localDate.minus(1,ChronoUnit.YEARS));
                System.out.println(localDate+" Minus One Year\t: "+localDate.minusYears(1)+"\t//Using minusYears(long)");
                System.out.println(localDate+" Minus One Weeks\t: "+localDate.minus(1,ChronoUnit.WEEKS));
                System.out.println(localDate+" Minus One Weeks\t: "+localDate.minusWeeks(1)+"\t//Using minusWeeks(long)");

                System.out.println("LocalDate.of(int Year,int Month,int Days)\t: "+LocalDate.of(2015, 02, 02));
                System.out.println("LocalDate.of(int Year,Month Month,int Days)\t: "+LocalDate.of(2015, Month.FEBRUARY, 02));
                System.out.println("LocalDate of Year Day \t\t: "+LocalDate.ofYearDay(2015, localDate.getDayOfYear()));
                System.out.println("LocalDate.parse(CharSequence)\t\t: "+LocalDate.parse("2015-03-30")+"\t //By Default FormatDate yyyy-MM-dd");
                System.out.println("LocalDate.parse(CharSequence,DateFormatter)\t: "+LocalDate.parse("30-Mar-2015",DateTimeFormatter.ofPattern("dd-MMM-yyyy"))+"\t//Parse using DateFormater");
                
                System.out.println(localDate+" Plus one Day\t\t: "+localDate.plus(1, ChronoUnit.DAYS));
                System.out.println(localDate+" Plus one Day\t\t: "+localDate.plusDays(1)+"\t//Using minusDays(long)");
                System.out.println(localDate+" Plus One Month\t: "+localDate.plus(1,ChronoUnit.MONTHS));
                System.out.println(localDate+" Plus One Months\t: "+localDate.plusMonths(1)+"\t//Using plusMonths(long)");
                System.out.println(localDate+" Plus One Year\t: "+localDate.plus(1,ChronoUnit.YEARS));
                System.out.println(localDate+" Plus One Year\t: "+localDate.plusYears(1)+"\t//Using plusYears(long)");
                System.out.println(localDate+" Plus One Weeks\t: "+localDate.plus(1,ChronoUnit.WEEKS));
                System.out.println(localDate+" Plus One Weeks\t: "+localDate.plusWeeks(1)+"\t//Using plusWeeks(long)");
                
                //LocalDate.with
                System.out.println("Local Date With(TemporalField,new_value=21)");
                System.out.println(localDate+" With(ChronoField.DAY_OF_MONTH,21) : "+localDate.with(ChronoField.DAY_OF_MONTH, 21));
                System.out.println(localDate+" With(ChronoField.DAY_OF_YEAR,21) : "+localDate.with(ChronoField.DAY_OF_YEAR, 21));
                System.out.println(localDate+" With(ChronoField.DAY_OF_WEEK,21) : "+localDate.with(ChronoField.DAY_OF_WEEK, 1));
                
        
    }
}

And What we get is

Local date           : 2015-02-02
Local Date Minus 4 Days     : 2015-01-29
Chronology          : ISO
Day of Month            : 2
Day of Week         : MONDAY
Day of Year         : 33
Era             : CE
Month               : FEBRUARY
Month Value         : 2
Year                : 2015
2015-02-02 Is After 2015-01-29  : true
2015-02-02 Is Before 2015-01-29 : false
2015-02-02 Is Equals 2015-01-29 : false
Is Leap Year            : false
Now :2015-02-02 Is Leaf Year : 2016-02-02 :true
Is Supported TemporalField  : true
Is Supported TemporalUnit   : true
Length of Month (2015-02-02)    : 28
Length of Year (2015-02-02) : 365
2015-02-02 Minus one Day    : 2015-02-01
2015-02-02 Minus one Day    : 2015-02-01    //Using minusDays(long)
2015-02-02 Minus One Month  : 2015-01-02
2015-02-02 Minus One Months : 2015-01-02    //Using minusMonths(long)
2015-02-02 Minus One Year   : 2014-02-02
2015-02-02 Minus One Year   : 2014-02-02    //Using minusYears(long)
2015-02-02 Minus One Weeks  : 2015-01-26
2015-02-02 Minus One Weeks  : 2015-01-26    //Using minusWeeks(long)
LocalDate.of(int Year,int Month,int Days)   : 2015-02-02
LocalDate.of(int Year,Month Month,int Days) : 2015-02-02
LocalDate of Year Day       : 2015-02-02
LocalDate.parse(CharSequence)       : 2015-03-30     //By Default FormatDate yyyy-MM-dd
LocalDate.parse(CharSequence,DateFormatter) : 2015-03-30    //Parse using DateFormater
2015-02-02 Plus one Day     : 2015-02-03
2015-02-02 Plus one Day     : 2015-02-03    //Using minusDays(long)
2015-02-02 Plus One Month   : 2015-03-02
2015-02-02 Plus One Months  : 2015-03-02    //Using plusMonths(long)
2015-02-02 Plus One Year    : 2016-02-02
2015-02-02 Plus One Year    : 2016-02-02    //Using plusYears(long)
2015-02-02 Plus One Weeks   : 2015-02-09
2015-02-02 Plus One Weeks   : 2015-02-09    //Using plusWeeks(long)
Local Date With(TemporalField,new_value=21)
2015-02-02 With(ChronoField.DAY_OF_MONTH,21) : 2015-02-21
2015-02-02 With(ChronoField.DAY_OF_YEAR,21) : 2015-01-21
2015-02-02 With(ChronoField.DAY_OF_WEEK,21) : 2015-02-02