I need help with setting 2 decimal places

I am using netbeans to create a GUI. My math works I need help formatting the result to 2 decimal places.
Thanks for any help.
This is part of my code..
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// Regular button
double RegularPrice = 3.09;
double num1, result;
num1 = Float.parseFloat(jTextField1.getText());
result=RegularPrice * num1;
jLabel2.setText(String.valueOf(result));
}

http://java.sun.com/j2se/1.5.0/docs/api/java/text/DecimalFormat.html

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I need help with setting 2 decimal places

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