g1501_1600.s1507_reformat_date.Solution Maven / Gradle / Ivy

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Java-based LeetCode algorithm problem solutions, regularly updated

There is a newer version: 1.37

package g1501_1600.s1507_reformat_date;

// #Easy #String #2022_04_08_Time_1_ms_(98.73%)_Space_42.5_MB_(46.87%)

import java.util.HashMap;
import java.util.Map;

public class Solution {
    public String reformatDate(String date) {
        StringBuilder sb = new StringBuilder();
        Map map = new HashMap<>();
        map.put("Jan", "01");
        map.put("Feb", "02");
        map.put("Mar", "03");
        map.put("Apr", "04");
        map.put("May", "05");
        map.put("Jun", "06");
        map.put("Jul", "07");
        map.put("Aug", "08");
        map.put("Sep", "09");
        map.put("Oct", "10");
        map.put("Nov", "11");
        map.put("Dec", "12");
        sb.append(date.substring(date.length() - 4));
        sb.append('-');
        sb.append(map.get(date.substring(date.length() - 8, date.length() - 5)));
        sb.append('-');
        if (Character.isDigit(date.charAt(1))) {
            sb.append(date, 0, 2);
        } else {
            sb.append('0');
            sb.append(date.charAt(0));
        }
        return sb.toString();
    }
}