8);List<int[]>pairs=numbers1.stream().flatMap(i->numbers2.stream().map(j->newint[]{i, j})).collect(Collectors.toList());for(int[] pair:pairs){System.out.println("pair:"+Arrays.toString(pair));
Stream.flatMap(Function<? super T, ? extends Stream<? extends R>> mapper) flatMap扁平化映射,即将数据元素为数组的Stream转化为单个元素 Stream<String> stringStream = Stream.of("Hello Aron."); // 返回值为数组 Stream<String[]> stringArrayStream = stringStream.map(word -> word.split(" "));...
Map<Department,Double>map=persons.stream().collect(groupingBy(Person::department,averagingDouble(Person::salary)));System.out.println(map)
* itself, either because the stream was already unordered, or because * the underlying stream state was modified to be unordered. * * This is an intermediate * operation. * *@returnan unordered stream */Sunordered();/** * Returns an equivalent stream with an additional close handler. Close...
Exception in thread "main" java.io.NotSerializableException: com.example.demo.Student at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) at com.example.demo.Test.main(Test.java:13) 复制代码 ...
InputStreamResource类,需要重写2个方法 * getFilename:文件名称 * contentLength:长度 */ File file = new File("/java/com/example/springmvc/22c017e48ea445199708dc1d2832dae5.pdf"); //2、建立数据通道 try { InputStream inputStream = new FileInputStream(file); InputStreamResource inputStream...
out.println("This is methodTwo"); return 2; } @Test void assertExample() { assert methodOne().equals("This is methodOne"); } @Test void assertFailureExample() { assert 1 == 2: "What a surprise!"; } @Test void exceptionExample() throws IOException { try(FileInputStream fis = ...
java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:159) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233) at java.base/java.util.stream....
(); v.stream().map(TagInfo::getTagId).map(lastValues::get).filter(Functions.not(Objects::isNull)) .map(data -> Pair.of(now, data)).forEach(transferQueue::add); }, 0, k.toNanos(), TimeUnit.NANOSECONDS)); //then subscribe for all final SubscriptionConfiguration subscription...
dirs.isEmpty()) {finalImmutableMap<String,String>new_flume_builder = dirs.stream() .reduce(ImmutableMap.<String,String>builder()// defaults.put("channels","mem").put("channels:mem:capacity","1000") .put("channels:mem:transactionCapacity","100").put("channels:mem:type","memory"), (acc,...