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public class SharedState { @Test public void sharedState(){ final ExecutorService executorService = Executors.newCachedThreadPool(); final SimpleCounter simpleCounter = new SimpleCounter(); executorService.execute(new CounterSetter(simpleCounter)); simpleCounter.setNumber(200); assertEquals(200, simpleCounter.getNumber()); } private static class CounterSetter implements Runnable{ private final S..