how to format double to 2 decimal places in java

/**
 * @author lautturi.com
 * Java example: Double upto 2 decimal places in java
 */

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

public class Lautturi {

	public static void main(String[] args) {

		//DecimalFormat df = new DecimalFormat("0.00");
		// Or
		DecimalFormat df = new DecimalFormat("#.##");

		double pie = 3.14159265359;

		System.out.println("double : " + pie);
		System.out.println("double : " + df.format(pie));
		
	}
}

output:

double : 3.14159265359
double : 3.14