refactoring : global data - encapsulate variable

refactoring/src/main/java/com/example/refactoring/_05_global_data/_00_before/Home.java

@@ -0,0 +1,10 @@
+package com.example.refactoring._05_global_data._00_before;
+
+public class Home {
+
+    public static void main(String[] args) {
+        System.out.println(Thermostats.targetTemperature);
+        Thermostats.targetTemperature = -1111600;
+        Thermostats.fahrenheit = false;
+    }
+}

refactoring/src/main/java/com/example/refactoring/_05_global_data/_00_before/Thermostats.java

@@ -0,0 +1,15 @@
+package com.example.refactoring._05_global_data._00_before;
+
+public class Thermostats {
+
+    public static Integer targetTemperature = 70;
+
+    public static Boolean heating = true;
+
+    public static Boolean cooling = false;
+
+    public static Boolean fahrenheit = true;
+
+
+
+}

refactoring/src/main/java/com/example/refactoring/_05_global_data/_17_encapsulate_variable/Home.java

@@ -0,0 +1,10 @@
+package com.example.refactoring._05_global_data._17_encapsulate_variable;
+
+public class Home {
+
+    public static void main(String[] args) {
+        System.out.println(Thermostats.getTargetTemperature());
+        Thermostats.setTargetTemperature(68);
+        Thermostats.setFahrenheit(false);
+    }
+}

refactoring/src/main/java/com/example/refactoring/_05_global_data/_17_encapsulate_variable/Thermostats.java

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+package com.example.refactoring._05_global_data._17_encapsulate_variable;
+
+public class Thermostats {
+
+    private static Integer targetTemperature = 70;
+
+    private static Boolean heating = true;
+
+    private static Boolean cooling = false;
+
+    private static Boolean fahrenheit = true;
+
+
+    public static Integer getTargetTemperature() {
+        return targetTemperature;
+    }
+
+    public static void setTargetTemperature(Integer targetTemperature) {
+        // TODO validation ....
+        Thermostats.targetTemperature = targetTemperature;
+    }
+
+    public static Boolean getHeating() {
+        return heating;
+    }
+
+    public static void setHeating(Boolean heating) {
+        Thermostats.heating = heating;
+    }
+
+    public static Boolean getCooling() {
+        return cooling;
+    }
+
+    public static void setCooling(Boolean cooling) {
+        Thermostats.cooling = cooling;
+    }
+
+    public static Boolean getFahrenheit() {
+        return fahrenheit;
+    }
+
+    public static void setFahrenheit(Boolean fahrenheit) {
+        Thermostats.fahrenheit = fahrenheit;
+    }
+}