Java's Formatter class allows you to format data before it is output. With the Formatter, you can define the maximum width of a value, and the Formatter then automatically pads the value with ...

When your class implements the Formattable interface, the Formatter class can use it to customize output formatting. You are no longer limited to what is printed by toString() for your class.

How to format a Date in Java with printf?. The best way to output date and time values in Java is with the DateTimeFormatter class. But the printf method supports simple date formatting through the ...

Java double precision. The precision of a double in Java is 10-324 decimal places, although true mathematical precision can suffer due to issues with binary arithmetic. To simplify display, you can ...