TimSongCoder
diff --git a/‎Chapter10/AtomicVariableDemo.java‎
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+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class AtomicVariableDemo{
+	public static void main(String[] args){
+		int threadAcount = 20;
+		ExecutorService es = Executors.newFixedThreadPool(threadAcount);
+		Runnable runnable = new Runnable(){
+			public void run(){
+				System.out.println(Thread.currentThread() + " get id: " + ID.getNextID());
+				if(ID.getNextID() == threadAcount){
+					es.shutdown();
+				}
+			}
+		};
+		for(int i=0; i<threadAcount; i++){
+			es.submit(runnable);
+		}
+	}
+}
+
+class ID{
+	private static AtomicLong nextID = new AtomicLong(0);
+	
+	static long getNextID(){
+		return nextID.getAndIncrement();
+	}
+}