Java Formatter Methods

More Utility Classes > Formatter >
Siva Nookala - 03 Mar 2017

The most important method on the Formatter class is format. Using this method, we can format the data to our requirements.

This table shows various methods on the Formatter class.

Method	Description
Formatter format(String fmtString, Object... args)	This is the main method which we need to use to format various objects like Strings, numbers, date and time to the required format.
Formatter format(Locale loc, String fmtString, Object... args)	Same as the previous format method, but additionally we can pass the `Locale` to do the formatting depending upon the `Locale`.
`void close()`	closes the `Formatter` and releases any underlying resources. Should be called after you are done with using the `Formatter`.
void flush()	Writes the formatted data into the underlying resource. If we created the `Formatter` using the `File`, then this method will forcefully write all the content into the `File`.
IOException ioException()	Returns any underlying exception, if it happens during the formatting. If no exception occurs it return `null`.
Locale locale()	Returns the `Locale` used for formatting.
Appendable out()	Returns the reference to the underlying object which could be StringBuilder or any other OutputStream.
String toString()	Returns the formatted content as `String`. After we have formatted the data, we can use this method to easily print the output.

In Java Formatter , we will understand how to use the Formatter using an example.

Java Formatter Class

Java Formatter