Java Query Find the date of family vacation date - Java Date Time

Java examples for Date Time:Date Time Query

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Description

Java Query Find the date of family vacation date

Demo Code

import java.time.Month;
import java.time.Year;
import java.time.LocalDate;
import java.time.DateTimeException;

import java.time.temporal.TemporalQuery;
import java.time.temporal.TemporalAccessor;

import java.io.PrintStream;
import java.time.Month;
import java.time.Year;
import java.time.LocalDate;
import java.time.DateTimeException;

import java.time.temporal.TemporalQuery;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.ChronoField;

import java.io.PrintStream;
import java.lang.Boolean;
import java.time.Month;
import java.time.Year;
import java.time.LocalDate;
import java.time.DateTimeException;

import java.time.temporal.TemporalQuery;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.ChronoField;

import java.io.PrintStream;
import java.lang.Boolean;

 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;
    }//from   w  w  w.  j  a  v  a  2  s  .  co  m
}
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;
    }
}

public class CheckDate {

    public static void main(String[] args) {
    Month month = null;
    LocalDate date = null;

    if (args.length < 2)
    {
        System.out.printf("Usage: CheckDate <month> <day>%n");
        throw new IllegalArgumentException();
    }

    try {
        month = Month.valueOf(args[0].toUpperCase());
    } catch (IllegalArgumentException exc) {
        System.out.printf("%s is not a valid month.%n", args[0]);
        throw exc;    // Rethrow the exception.
    }

    int day = Integer.parseInt(args[1]);

    try {
        date = LocalDate.of(Year.now().getValue(), month, day);
    } catch (DateTimeException exc) {
        System.out.printf("%s %s is not a valid date.%n", month, day);
        throw exc;     // Rethrow the exception.
    }

    // 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);
}
}

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 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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