commit Exercise_30_10

csv77 · csv77 · commit 5682b4af2137 · 2017-09-30T20:04:32.000+02:00
diff --git a/Chapter_30/exercise_30_10/Exercise_30_10.java b/Chapter_30/exercise_30_10/Exercise_30_10.java
@@ -0,0 +1,54 @@
+package exercise_30_10;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+
+public class Exercise_30_10 {
+    private static Set set = Collections.synchronizedSet(new HashSet());
+    
+    public static void main(String[] args) {
+        Thread thread1 = new Thread(new AddToSetTask());
+        Thread thread2 = new Thread(new TraverseSetTask());
+        thread1.start();
+        thread2.start();
+    }
+    
+    public static class AddToSetTask implements Runnable {
+
+        @Override
+        public void run() {
+            for(int i = 0; i < 1000000; i++) {
+                System.out.println("AddToSetThread");
+                set.add(i);
+                try {
+                    Thread.sleep(1000);
+                }
+                catch (InterruptedException ex) {
+                }
+            }
+        }
+    }
+    
+    public static class TraverseSetTask implements Runnable {
+
+        @Override
+        public void run() {
+            while(true) {
+                System.out.println("TraverseSetThread");
+                try {
+                    Thread.sleep(1000);
+                }
+                catch (InterruptedException ex) {
+                }
+                synchronized(set) {
+                    Iterator<Integer> iterator = set.iterator();
+                    while(iterator.hasNext()) {
+                        System.out.println(iterator.next());
+                    }
+                }        
+            }
+        }
+    }
+}
