Question

I am very new to Java and playing with displaying a message with GUI. So if use the console

System.out.printf("Your total montly bill is $%.2f",  totalCost); 

gives me the output with decimal the way it should. I am trying to do the same thing with this, but I get more digits after the decimal because totalCost is a type double. How can I format the output to only show two digits after the decimal? Thanks.

JOptionPane.showMessageDialog(null, "Your monthly payment is " + totalCost);

Answer 1

You could do:

JOptionPane.showMessageDialog(null, String.format("Your monthly payment is $%.2f",  totalCost));