Learn how to use synchronous and asynchronous callbacks in Java—including callbacks with lambda expressions, CompletableFuture, and more.

Here's a quick tutorial on how to use printf to format Java int, long, short and byte values. It's pretty easy to do. And the output you can generate can be very visually appealing.

To use Java printf to format double and float values with decimal place precision, follow these two rules: Use %f as the double specifier in the text string. Precede the letter f with a decimal and ...