How do I convert day of the year to date?

package org.kodejava.example.util;

import java.util.Calendar;

public class DayOfYearToDate {
    public static void main(String[] args) {
        // In the example we want to get the date value of the specified
        // day of the year. Using the calendar object we can define our
        // calendar for a specific day of the year.

        int dayOfYear = 112;
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, dayOfYear);

        System.out.println("Day of year " + dayOfYear + " = "
                + calendar.getTime());

        // If you want to get the date for a specific day of year and for
        // a specific year, you can also pass the year information to the
        // calendar object.

        int year = 2004;
        calendar.set(Calendar.YEAR, year);
        System.out.println("Day of year " + dayOfYear + " in year " + year
                + " = " + calendar.getTime());
    }
}

And here is an example result of the code above:

Day of year 112 = Sun Apr 22 16:53:03 GMT+07:00 2007
Day of year 112 in year 2004 = Wed Apr 21 16:53:03 GMT+07:00 2004

How do I convert day-of-year to day-of-month?

package org.kodejava.example.util;

import java.util.Calendar;

public class DayYearToDayMonth {
    public static void main(String[] args) {
        // Create an instance of calendar for the year 2007 and set the
        // day to the 180 day of the year.
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, 2007);
        cal.set(Calendar.DAY_OF_YEAR, 180);

        // Print the date of the calendar.
        System.out.println("Calendar date is: " + cal.getTime());

        // To know what day in month of the calendar we can obtain the
        // value by calling Calendar's instance get() method and pass
        // the Calendar.DAY_OF_MONTH field.
        int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);

        // Print which month day is it in number.
        System.out.println("Calendar day of month: " + dayOfMonth);

        // To know what day in week of the calendar we can obtain the
        // value by calling Calendar's instance get() method and pass
        // the Calendar.DAY_OF_WEEK field.
        int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);

        // Print which week day is it in number.
        System.out.println("Calendar day of week: " + dayOfWeek);
    }
}

The result of our above example is.

Calendar date is: Fri Jun 29 18:24:07 ICT 2007
Calendar day of month: 29
Calendar day of week: 6