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| 1 | +packagecom.winterbe.java8.samples.concurrent; |
| 2 | + |
| 3 | +importjava.util.concurrent.ExecutorService; |
| 4 | +importjava.util.concurrent.Executors; |
| 5 | +importjava.util.concurrent.atomic.LongAdder; |
| 6 | +importjava.util.stream.IntStream; |
| 7 | + |
| 8 | +/** |
| 9 | + * @author Benjamin Winterberg |
| 10 | + */ |
| 11 | +publicclassLongAdder1 { |
| 12 | + |
| 13 | +privatestaticfinalintNUM_INCREMENTS =10000; |
| 14 | + |
| 15 | +privatestaticLongAdderadder =newLongAdder(); |
| 16 | + |
| 17 | +publicstaticvoidmain(String[]args) { |
| 18 | +testIncrement(); |
| 19 | +testAdd(); |
| 20 | + } |
| 21 | + |
| 22 | +privatestaticvoidtestAdd() { |
| 23 | +ExecutorServiceexecutor =Executors.newFixedThreadPool(2); |
| 24 | + |
| 25 | +IntStream.range(0,NUM_INCREMENTS) |
| 26 | + .forEach(i ->executor.submit(() ->adder.add(2))); |
| 27 | + |
| 28 | +ConcurrentUtils.stop(executor); |
| 29 | + |
| 30 | +System.out.format("Add: %d\n",adder.sumThenReset()); |
| 31 | + } |
| 32 | + |
| 33 | +privatestaticvoidtestIncrement() { |
| 34 | +ExecutorServiceexecutor =Executors.newFixedThreadPool(2); |
| 35 | + |
| 36 | +IntStream.range(0,NUM_INCREMENTS) |
| 37 | + .forEach(i ->executor.submit(adder::increment)); |
| 38 | + |
| 39 | +ConcurrentUtils.stop(executor); |
| 40 | + |
| 41 | +System.out.format("Increment: Expected=%d; Is=%d\n",NUM_INCREMENTS,adder.sumThenReset()); |
| 42 | + } |
| 43 | +} |