Java String.format() is a method that returns a formatted string using a format string and arguments, similar to Java System.out.printf(). It allows for precise control over the output, such as specifying the number of decimal places for floating-point numbers or padding integers with leading zeros. Introduced in Java 2004 with Java 5, format() is widely used in applications for generating formatted reports, logs, or user-facing messages.

https://docs.oracle.com/javase/8/docs/api/java/lang/String.html