import java.io.*;
 
public class Test{
    
    public Test(){
        
    }
    
    public static void main (String[] args){
        Test test = new Test();
        String dateString = test.getDateString();
        if (test.validateDateString(dateString)){
            System.out.println(dateString);
        }else{
            System.out.println("Invalidate date entered.");            
        }
    }
    
 
    
    public String readConsoleInput(){
        String lineRead = "";
        try{
            InputStreamReader isr = new InputStreamReader(System.in); 
            BufferedReader br = new BufferedReader(isr);
            lineRead = br.readLine();
        }catch(IOException ioe){
            System.err.println("IOException: " + ioe.getMessage());
        }
        return lineRead;        
    }
    
    public String getDateString(){
        String lineRead = "";
        try{
            System.out.println("Enter Date: MM-DD-YYYY");
            InputStreamReader isr = new InputStreamReader(System.in); 
            BufferedReader br = new BufferedReader(isr);
            lineRead = br.readLine();
        }catch(IOException ioe){
            System.err.println("IOException: " + ioe.getMessage());
        }
        return lineRead;        
    }
    
    public boolean validateDateString(String dateString){
        int month = toInt(getMonth(dateString));
        int day = toInt(getDay(dateString));
        int year = toInt(getYear(dateString));
        System.out.println("Month: " + month);
        System.out.println("Day: " + day);
        System.out.println("Year: " + year);
        return ((month > 0) && (month <= 12)
                && (day > 0) && (day <= 31)
                && (year > 0) && (getYear(dateString).length() == 4));
    }
    
    private String getMonth(String dateString){
        String month = "";
        if (dateString.indexOf("-") > 0) month = dateString.substring(0,dateString.indexOf("-"));
        return month;        
    }
 
    private String getDay(String dateString){
        String day = "";
        if (dateString.indexOf("-") > 0) day = dateString.substring(dateString.indexOf("-") + 1,dateString.lastIndexOf("-"));
        return day;        
    }
 
    private String getYear(String dateString){
        String year = "";
        if (dateString.indexOf("-") > 0) year = dateString.substring(dateString.lastIndexOf("-")+1);
        return year;        
    }
    
    
    private int toInt(String s){
        int n = -1;
        try{
            n = Integer.parseInt(s);
        }catch(NumberFormatException nfe){
            System.err.println(s + " is not a valid integer.");
        }
        return n;
    }
}

String format = "yyyy-MM-dd";
String inputDate = "2003-12-25";
SimpleDateFormat sdf = new SimpleDateFormat(format);
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(sdf.parse(inputDate));