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)
AI代码解释 // annotations/UseCaseTracker.javaimportjava.util.*;importjava.util.stream.*;importjava.lang.reflect.*;publicclassUseCaseTracker{publicstaticvoidtrackUseCases(List<Integer>useCases,Class<?>cl){for(Method m:cl.getDeclaredMethods()){UseCase uc=m.getAnnotation(UseCase.class);if(uc!=nul...
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...
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BaseStream# BaseStream是所有流的父类接口。 对JavaDoc做一次解读,了解提供的所有方法。# Copy /** * Base interface for streams, which are sequences of elements supporting * sequential and parallel aggregate operations. The following example * illustrates an aggregate operation using the stream types {...
class); String packageNames = "com.thinkbiganalytics"; if (map != null && !map.isEmpty()) { String beanPackageNames = map.values().stream().map(o -> o.getClass().getPackage().getName()).distinct() .collect(Collectors.joining(",")); if (StringUtils.isNotBlank(beanPackageNames))...
(); 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...
// open an input stream to the file FileInputStream fis = new FileInputStream(filename); // instantiate a CertificateFactory for X.509 CertificateFactory cf = CertificateFactory.getInstance("X.509"); // extract the certification path from // the PKCS7 SignedData structure CertPath cp = cf...