commit Exercise_30_09

csv77 · csv77 · commit a5a79bf7abe1 · 2017-09-30T19:38:22.000+02:00
diff --git a/Chapter_30/exercise_30_09/Exercise_30_09.java b/Chapter_30/exercise_30_09/Exercise_30_09.java
@@ -0,0 +1,48 @@
+package exercise_30_09;
+
+import java.util.HashSet;
+import java.util.Iterator;
+
+public class Exercise_30_09 {
+    private static HashSet<Integer> set = 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++) {
+                set.add(i);
+            }
+            try {
+                    Thread.sleep(1000);
+            }
+            catch (InterruptedException ex) {
+            }
+        }
+    }
+    
+    public static class TraverseSetTask implements Runnable {
+
+        @Override
+        public void run() {
+            try {
+                while(true) {
+                    Iterator<Integer> iterator = set.iterator();
+                    while(iterator.hasNext()) {
+                        System.out.println(iterator.next());
+                    }
+                    Thread.sleep(1000);
+                }
+            }
+            catch (InterruptedException ex) {
+            }
+        }
+    }
+}
