Date_From_Str, Java

Date_From_Str

//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

import java.util.*;
import java.lang.*;
import java.util.Map.Entry;
import java.text.SimpleDateFormat;
import java.text.DateFormat;

class Rextester
{  
    public static void main(String args[])
    {
        //String vDateStr = "23.09.2019T23:59:59";
        String vDateStr = "23.09.2019";
        Date vParsedDate = null;
        Map<String, String> mapDateMasks = new HashMap<>();
        mapDateMasks.put("\\d{4}\\.\\d{2}\\.\\d{2}$","yyyy.mm.dd");
        mapDateMasks.put("\\d{4}\\-\\d{2}\\-\\d{2}T\\d{2}:\\d{2}:\\d{2}","yyyy-mm-dd'T'HH:mm:ss");
        mapDateMasks.put("\\d{4}\\-\\d{2}\\-\\d{2}$","yyyy-mm-dd");        
        mapDateMasks.put("\\d{4}\\.\\d{2}\\.\\d{2}T\\d{2}:\\d{2}:\\d{2}","yyyy.mm.dd'T'HH:mm:ss");        
        mapDateMasks.put("\\d{2}\\.\\d{2}\\.\\d{4}","dd.mm.yyyy");                        
        mapDateMasks.put("\\d{2}\\.\\d{2}\\.\\d{4}T\\d{2}:\\d{2}:\\d{2}","dd.mm.yyyy'T'HH:mm:ss");                
        
        System.out.println("Str_Date = " + vDateStr);
        for (Entry<String,String> tmpDatemask : mapDateMasks.entrySet()) {
            System.out.println(tmpDatemask.getKey());
            if (vDateStr.matches(tmpDatemask.getKey())) {
              System.out.println("mask ok. using template = \"" + tmpDatemask.getValue() + "\"");
              DateFormat df = new SimpleDateFormat(tmpDatemask.getValue());
              try {
                vParsedDate = df.parse(vDateStr);
                if (vParsedDate != null) { 
                  break;  
                }    
              } catch (Exception e) {
              };
            }    
        }
        System.out.println("vParsedDate = " + vParsedDate);
    }
}


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