need to show date in yyyy/mm/dd format in java

I am using Nebulla DateChooserCombo. I have used it as dateChooserFrom.getText();. It is Producing the result like 7/31/2011 which is in m/dd/yyyy and mm/dd/yyyy format. I need the result in yyyy/mm/dd format. For that I have use the code as.

DateFormat df = new SimpleDateFormat("yyyy-MM-dd");  
String s = df.format(dateChooserFrom.getText()); 

But when I run the code it says Cannot format given Object as a Date . so please anybody could help me on this. I am using eclipse rcp and java.

DateFormat dffrom = new SimpleDateFormat("M/dd/yyyy");
DateFormat dfto = new SimpleDateFormat("yyyy-MM-dd");  
Date today = dffrom.parse("7/1/2011");
String s = dfto.format(today);

Convert the String to Date first.

I don't know what Nebulla DateChooserCombo is but I guess the problem is related to the returning type of the instance method getText. Is is a date? Because you have to pass an instance of java.util.Date to the format method.

Use this:

public class Class1 {
    public static void main(String args[]) {
      Date date = new Date();
      Calendar calendar = Calendar.getInstance();
      calendar.setTime(date);
      SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd");//you can use any format that you want, for example:("yyyy/MM/dd")
      String s = SDF.format(date);
      System.out.print(s);
      }
}