Date and Time Conversion using java

Convert one Date format to Another Date format using java.

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class ConversionExamplesDate {

  // Convert from String to date
  private void stringToDate() {
    
    try {
      Date date1;
      date1 = new SimpleDateFormat("MM/dd/yy").parse("05/18/05");
      System.out.println(date1);
      Date date2 = new SimpleDateFormat("MM/dd/yyyy").parse("05/18/2007");
      System.out.println(date2);
    } catch (ParseException e) {
      e.printStackTrace();
    }
  }

  // Convert from millisecs to a String with a defined format
  private void calcDate(long millisecs) {
    SimpleDateFormat date_format = new SimpleDateFormat("MMM dd,yyyy HH:mm");
    Date resultdate = new Date(millisecs);
    System.out.println(date_format.format(resultdate));
  }
  
  private void writeActualDate(){
    Calendar cal = new GregorianCalendar();
    Date creationDate = cal.getTime();
    SimpleDateFormat date_format = new SimpleDateFormat("MMM dd,yyyy HH:mm");
    System.out.println(date_format.format(creationDate));
  }
  

  public static void main(String[] args) {
    ConversionExamplesDate convert = new ConversionExamplesDate();
    convert.stringToDate();
    convert.calcDate(System.currentTimeMillis());
    convert.writeActualDate();
  }
}