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Modern Java: From Fundamentals to Advanced Architecture

Solution: Smart Thermostat Control

Explore how to implement a smart thermostat control in Java by using conditionals and methods to determine heating, cooling, or standby modes based on temperature thresholds. Understand how to structure code for clear decision making and ensure each control branch works as expected.

We'll cover the following...
Java 25
public class ThermostatControl {
    
    public static String getOperatingMode(double currentTemp, double targetTemp) {
        if (currentTemp < targetTemp - 5) {
            return "Heating";
        } else if (currentTemp > targetTemp + 5) {
            return "Cooling";
        } else {
            return "Standby";
        }
    }
    public static void main(String[] args) {
        System.out.println("Current: 60, Target: 70 -> " + getOperatingMode(60.0, 70.0));
        System.out.println("Current: 80, Target: 70 -> " + getOperatingMode(80.0, 70.0));
        System.out.println("Current: 72, Target: 70 -> " + getOperatingMode(72.0, 70.0));
    }
}
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