Calculating Julian date

There was this need for identifying the date in YYYYMMDD format when year and day of the year was to be taken from a property value.

I did this by creating utility in Pega, though Java coding is the last option suggested in PRPC.
Here is the code-

import java.util.GregorianCalendar;

public class Julian {

public static void main(String[] argv) {

    GregorianCalendar gc = new GregorianCalendar();

    String yr="2011"; // parameter to be passed into the function

    String day="230"; // parameter to be passed into the function

   

    int yr1 = Integer.parseInt(yr);

    int day1 = Integer.parseInt(day);

   

    gc.set(GregorianCalendar.YEAR, yr1);

    gc.set(GregorianCalendar.DAY_OF_YEAR, day1);

    int Day;

    int Month;

    Day=gc.get(GregorianCalendar.DAY_OF_MONTH);

    Month=(gc.get(GregorianCalendar.MONTH)+1);

    String mm=Integer.toString(Month);

    String dd=Integer.toString(Day);

    if(Month <10 ){

        mm=0+mm;

    }

    if (Day <10){

        dd=0+dd;

    }

    String date=yr+mm+dd;

  }

}

If anyone can suggest better approach, that would be great.