[Ch15] Book example for race condition/lost update (be56d377) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch15/TestSyncTest.java→src/main/java/ch15/LostUpdate.java

+3 −7

Changes for src/main/java/ch15/LostUpdate.java: 3 added lines, 7 removed lines.
Original line number	Diff line number	Diff line
		@@ -4,12 +4,12 @@ import java.util.concurrent.ExecutorService;
		import java.util.concurrent.Executors;
		import java.util.concurrent.TimeUnit;

		public class TestSyncTest {
		public class LostUpdate {
		public static void main(String[] args) throws InterruptedException {
		ExecutorService pool = Executors.newFixedThreadPool(6);
		ExecutorService pool = Executors.newFixedThreadPool(30);
		Balance balance = new Balance();
		for (int i = 0; i < 1000; i++) {
		pool.execute(() -> incrementBalance(balance));
		pool.execute(() -> balance.increment());
		}
		pool.shutdown();
		// make sure the pool has finished running all the updates before printing the output
		@@ -17,10 +17,6 @@ public class TestSyncTest {
		System.out.println("balance = " + balance.balance);
		}
		}

		private static void incrementBalance(Balance balance) {
		balance.increment();
		}
		}

		class Balance {