Our stock market program will consist of three main components:
A function simulating an external service from which we can query the current price—this would likely be a network call in a real setting
A scheduler that polls the preceding function at a predefined interval
A display function responsible for updating the screen
We'll start by creating a new leiningen project, where the source code for our application will live. Type the following on the command line and then switch into the newly created directory:
lein new stock-market-monitor cd stock-market-monitor
As we'll be building a GUI for this application, go ahead and add a dependency on Seesaw to the dependencies section of your project.clj:
[seesaw "1.4.4"]
Next, create a src/stock_market_monitor/core.clj file in your favorite editor. Let's create and configure our application's UI components:
(ns stock-market-monitor.core (:require [seesaw.core :refer :all]) (:import (java.util.concurrent...