Check if the two dates are equals comparing only those fields that are given in the array. Example: Date a = new Date(); Date b = new Date(); int[] fields = { Calendar.MONTH, Calendar.DAY_OF_MONTH }; boolean equality = equals(fields, a, b); - Java java.util

Java examples for java.util:Month

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Description

Check if the two dates are equals comparing only those fields that are given in the array. Example: Date a = new Date(); Date b = new Date(); int[] fields = { Calendar.MONTH, Calendar.DAY_OF_MONTH }; boolean equality = equals(fields, a, b);

Demo Code


//package com.java2s;

import java.util.Calendar;
import java.util.Date;

public class Main {
    public static void main(String[] argv) throws Exception {
        int[] fields = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        Date dateA = new Date();
        Date dateB = new Date();
        System.out.println(equals(fields, dateA, dateB));
    }//from   w ww .  j av  a2  s  .  co  m

    /**
     * Check if the two dates are equals comparing only those fields that are
     * given in the array.<br/>
     * Example:<br/>
     * <code>Date a = new Date();</code><br/>
     * <code>Date b = new Date();</code><br/>
     * <code>int[] fields = { Calendar.MONTH, Calendar.DAY_OF_MONTH };</code><br/>
     * <code>boolean equality = equals(fields, a, b);</code><br/>
     *
     * @param fields
     *            the fields to compare (Constants from Calendar)
     * @param dateA
     *            the first date to be compared with the second
     * @param dateB
     *            the second date to be compared with the first
     * @return <code>true</code> if they equal, <code>false</code> if not.
     */
    public static boolean equals(int[] fields, Date dateA, Date dateB) {
        Calendar calendar = Calendar.getInstance();
        // if both are null return true
        if (dateA == null && dateB == null) {
            return true;
        }
        // if either one is null then return false
        if (dateA == null || dateB == null) {
            return false;
        }

        boolean b = true;
        int[] values = new int[fields.length];

        calendar.setTime(dateA);
        for (int i = 0; i < fields.length; i++) {
            values[i] = calendar.get(fields[i]);
        }
        calendar.setTime(dateB);
        for (int i = 0; i < fields.length; i++) {
            int x = calendar.get(fields[i]);
            if (values[i] != x) {
                b = false;
                break;
            }
        }
        return b;
    }
}

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