How can I output only a certain number of digits after a decimal place in a JTextComponent?

问题

I am using both JLabels and JTextFields, and need to be able to truncate my doubles to two decimal places when they are displayed by the application.

How can I perform this truncation, preferably without switching to JFormattedTextFields?

回答1:

You can use DecimalFormat class. Here is an explanation

回答2:

Prefer the Swing JFormattedTextField instead; see the Java Tutorial.

来源：https://stackoverflow.com/questions/2525492/how-can-i-output-only-a-certain-number-of-digits-after-a-decimal-place-in-a-jtex