Java convert string to double

/**
 * @author lautturi.com
 * Java example: convert string to double in java
 */

import java.util.*;
import java.text.DecimalFormat;
import java.text.ParseException;

public class Lautturi {

	public static void main(String[] args) {

		String s = "3.145";
		DecimalFormat dF = new DecimalFormat("0.000");
		Number num;
		try {
			num = dF.parse(s);
			double d = num.doubleValue();
			System.out.println("double:"+d);
		} catch (ParseException e) {
			e.printStackTrace();
		}
	}
}