import java.text.DateFormat;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class DateParse {
    
    public static void main(String[] args) throws Exception {
        final String dateStr = "1997-02-14T00:00:00.0000000+05:30";
        
        final String metaChars = "$()*+.?[\\^{|"; // Java regex meta-characters
        
        final Pattern YMD_PATTERN = Pattern.compile(
        "(\\d{4})[/\\-\\.](\\d{2})[/\\-\\.](\\d{2})"  // yyyy-mm-dd
        + "T(\\d{2}):(\\d{2}):(\\d{2})\\.(\\d{1,20})" // Thh:mm:ss.microsec
        + "\\+(\\d{2}):(\\d{2})"                      // +th:tm (timezone)
        );
        
        final Matcher matcher = YMD_PATTERN.matcher(dateStr);
        if (matcher.matches()) {
            final int TOKEN_COUNT = 9;
            final String[] tokens = new String[TOKEN_COUNT];
            for (int i = 0; i < TOKEN_COUNT; i++) {
                tokens[i] = matcher.group(i + 1);
                if (tokens[i] == null) {
                    throw new IllegalStateException("Invalid date string - cannot parse");
                }
            }
            System.out.println("" + Arrays.asList(tokens));
            // get time-zone
            final String tzStr = "GMT+" + tokens[7] + ":" + tokens[8];
            final TimeZone tz = TimeZone.getTimeZone(tzStr);
            final Calendar cal = Calendar.getInstance(tz);
            
            final int y = Integer.parseInt(tokens[0]);
            final int m = Integer.parseInt(tokens[1]);
            final int d = Integer.parseInt(tokens[2]);
            final int hh = Integer.parseInt(tokens[3]);
            final int mm = Integer.parseInt(tokens[4]);
            final int ss = Integer.parseInt(tokens[5]);
            final int ms = Integer.parseInt(tokens[6]);
            cal.set(y, m - 1 /* month is zero-based */, d, hh, mm, ss);
            
            final Date date = cal.getTime();
            System.out.println(date);
        } else {
            System.out.println("Does not match");
        }
    }
}