Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.time.LocalDate;
import java.time.Month;
import java.time.Year;
import java.time.temporal.ChronoField;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.TemporalQuery;

public class Main {
    public static void main(String[] args) {
        Month month = Month.valueOf("MARCH");

        int day = 10;
        LocalDate date = LocalDate.of(Year.now().getValue(), month, day);

        // Invoking the query without using a lambda expression.
        Boolean isFamilyVacation = date.query(new FamilyVacations());

        // Invoking the query using a lambda expression.
        Boolean isFamilyBirthday = date.query(FamilyBirthdays::isFamilyBirthday);

        if (isFamilyVacation.booleanValue() || isFamilyBirthday.booleanValue())
            System.out.printf("%s is an important date!%n", date);
        else
            System.out.printf("%s is not an important date.%n", date);
    }
}

class FamilyBirthdays {

    // Returns true if the passed-in date is the same as one of the
    // family birthdays. Because the query compares the month and day only,
    // the check succeeds even if the Temporal types are not the same.
    public static Boolean isFamilyBirthday(TemporalAccessor date) {
        int month = date.get(ChronoField.MONTH_OF_YEAR);
        int day = date.get(ChronoField.DAY_OF_MONTH);

        // Angie's birthday is on April 3.
        if ((month == Month.APRIL.getValue()) && (day == 3))
            return Boolean.TRUE;

        // Sue's birthday is on June 18.
        if ((month == Month.JUNE.getValue()) && (day == 18))
            return Boolean.TRUE;

        // Joe's birthday is on May 29.
        if ((month == Month.MAY.getValue()) && (day == 29))
            return Boolean.TRUE;

        return Boolean.FALSE;
    }
}

class FamilyVacations implements TemporalQuery<Boolean> {

    // Returns true if the passed-in date occurs during one of the
    // family vacations. Because the query compares the month and day only,
    // the check succeeds even if the Temporal types are not the same.
    public Boolean queryFrom(TemporalAccessor date) {
        int month = date.get(ChronoField.MONTH_OF_YEAR);
        int day = date.get(ChronoField.DAY_OF_MONTH);

        // Disneyland over Spring Break
        if ((month == Month.APRIL.getValue()) && ((day >= 3) && (day <= 8)))
            return Boolean.TRUE;

        // Smith family reunion on Lake Saugatuck
        if ((month == Month.AUGUST.getValue()) && ((day >= 8) && (day <= 14)))
            return Boolean.TRUE;

        return Boolean.FALSE;
    }
}
/*
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 *
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 * modification, are permitted provided that the following conditions
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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