In Java, we can implement the functional interface with a lambda expression and pass it to a method, then execute the function after an operation is finished. Here’s how that looks in code: ...

See the Java 101 Java interfaces tutorial for a more in-depth introduction to using interfaces in your Java programs, including where and where not to use default, static, and private methods.

showOptionDialog (). JOptionPane import and methods For example, the following Java class uses JOptionPane’s showInputDialog() method to prompt for user input, and then displays a message back to the ...