how to print a float with 2 decimal places in java

/**
 * @author lautturi.com 
 * Java example: print a float with 2 decimal places in java
 */

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

public class Lautturi {
	public static void main(String[] args) {
		float decimalNumber = 3.1415f;
		DecimalFormat df = new DecimalFormat();
		df.setMaximumFractionDigits(2);
		System.out.println(df.format(decimalNumber));
	}
}

output:

3.14