Added Enumeration classes

syndersage · Jul 22, 2022 · a15eb96 · a15eb96
1 parent 9e70f69
commit a15eb96
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diff --git a/src/main/java/com/randomtasks/enumerations/EnumDemo1.java b/src/main/java/com/randomtasks/enumerations/EnumDemo1.java
@@ -0,0 +1,24 @@
+package com.randomtasks.enumerations;
+
+public class EnumDemo1 {
+    public enum Transport {
+        CAR(10), TRUCK(10), AIRPLANE(10), BOAT(10), TRAIN(10);
+        int speed;
+        Transport(int speed) {
+            this.speed = speed;
+        }
+    }
+    public static void main(String[] args) {
+        try {
+            System.out.println(Transport.valueOf("CAR1"));
+        }
+        catch (IllegalArgumentException e) {
+            System.out.println("Illegal argument in enum list");
+        }
+        Transport tp1 = Transport.CAR;
+        Transport tp2 = Transport.CAR;
+        tp2.speed = 20;
+        System.out.println(tp1.speed);
+        System.out.println(Transport.BOAT.ordinal());
+    }
+}
diff --git a/src/main/java/com/trythis/c12/t01/TrafficLightDemo.java b/src/main/java/com/trythis/c12/t01/TrafficLightDemo.java
@@ -0,0 +1,75 @@
+package com.trythis.c12.t01;
+
+import com.randomtasks.enumerations.EnumDemo1;
+import com.randomtasks.multithreading.threadImplementsRunnable.MyThreadDemo;
+
+enum TrafficLight {
+    RED(5), GREEN(5), ORANGE_BEFORE_RED(2), ORANGE_BEFORE_GREEN(2);
+    private int time;
+    public int getTime() {
+        return time;
+    }
+    TrafficLight(int time) { this.time = time; }
+}
+
+class TrafficLightController implements Runnable {
+    private TrafficLight light;
+    private boolean stop = false;
+    private boolean change = false;
+
+    TrafficLightController() {
+        light = TrafficLight.RED;
+    }
+
+    TrafficLightController(TrafficLight light) {
+        this.light = light;
+    }
+
+    @Override
+    public void run() {
+        while (!stop) {
+            changeColor();
+            announcer();
+        }
+    }
+
+    synchronized private void changeColor() {
+        try {
+            Thread.sleep(light.getTime() * 1000L);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        switch (light) {
+            case RED -> light = TrafficLight.ORANGE_BEFORE_GREEN;
+            case ORANGE_BEFORE_GREEN -> light = TrafficLight.GREEN;
+            case GREEN -> light = TrafficLight.ORANGE_BEFORE_RED;
+            case ORANGE_BEFORE_RED -> light = TrafficLight.RED;
+        }
+        change = true;
+        notify();
+    }
+
+    synchronized public void announcer() {
+        while (!change) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        System.out.println("Traffic light color changed. Current color is " + light);
+        change = false;
+    }
+}
+
+public class TrafficLightDemo {
+    public static void main(String[] args) {
+        Thread thread = new Thread(new TrafficLightController(), "Traffic light");
+        thread.start();
+        try {
+            thread.join();
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}