Date date = null;
SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");
date = df.parse("20080808");
System.out.println(date);

------解决方案--------------------
Java code
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

public class DateParser {
    public static void main(String[] args) {
        String sDate="20080808";
        DateFormat formatter=new SimpleDateFormat("yyyyMMdd");
        java.util.Date date;
        try {
            date = formatter.parse(sDate);
            System.out.println(date);
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
}