Java_begining_to_medium_level/LeetcodePractice/ReformatDate.java at main · vivekkumarq/Java_begining_to_medium_level · GitHub

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package LeetcodePractice;

import java.util.*;

public class ReformatDate {
    public static String reformatDate(String date) {
        Map<String, String> monthMap = new HashMap<>();
        monthMap.put("Jan", "01");
        monthMap.put("Feb", "02");
        monthMap.put("Mar", "03");
        monthMap.put("Apr", "04");
        monthMap.put("May", "05");
        monthMap.put("Jun", "06");
        monthMap.put("Jul", "07");
        monthMap.put("Aug", "08");
        monthMap.put("Sep", "09");
        monthMap.put("Oct", "10");
        monthMap.put("Nov", "11");
        monthMap.put("Dec", "12");

        String[] parts = date.split(" ");
        String day = parts[0].replaceAll("[a-zA-Z]", "");
        if (day.length() == 1) day = "0" + day;
        String month = monthMap.get(parts[1]);
        String year = parts[2];

        return year + "-" + month + "-" + day;
    }

    public static void main(String[] args) {
        String d1 = "20th Oct 2052";
        String d2 = "6th Jun 1933";
        String d3 = "26th May 1960";

        System.out.println(reformatDate(d1));
        System.out.println(reformatDate(d2));
        System.out.println(reformatDate(d3));
    }
}