add practice 2

practice-2-sample/src/main/java/practice2/tiktak/Data.java

@@ -8,13 +8,42 @@ public int getState() {
         return state;
     }
 
-    public void Tic() {
+    public synchronized void Tic() {
+        while (state != 1) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
         System.out.print("Tic-");
         state = 2;
+        notifyAll();
     }
 
-    public void Tak() {
-        System.out.println("Tak");
+    public synchronized void Tak() {
+        while (state != 2) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        System.out.print("Tak-");
+        state = 3;
+        notifyAll();
+    }
+
+    public synchronized void Toy() {
+        while (state != 3) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        System.out.println("Toy");
         state = 1;
+        notifyAll();
     }
 }

practice-2-sample/src/main/java/practice2/tiktak/Main.java

@@ -7,11 +7,14 @@ public static void main(String[] args) throws InterruptedException {
 
         Thread w1 = new Thread(new Worker(1, d));
         Thread w2 = new Thread(new Worker(2, d));
+        Thread w3 = new Thread(new Worker(3, d));
+
 
         w1.start();
         w2.start();
+        w3.start();
 
-        w2.join();
+        w3.join();
         System.out.println("end of main...");
     }
 }

practice-2-sample/src/main/java/practice2/tiktak/Worker.java

@@ -15,8 +15,10 @@ public void run() {
         for (int i = 0; i < 5; i++) {
             if (id == 1) {
                 data.Tic();
-            } else {
+            } else if (id == 2){
                 data.Tak();
+            } else if (id == 3){
+                data.Toy();
             }
         }
     }