Java Stream.close方法代碼示例

import java.util.stream.Stream; //導入方法依賴的package包/類
static final List<String> getItems(final String path, final String ext) throws URISyntaxException, IOException {

		final List<String> itemFileNames = new ArrayList<>();

		final URI uri = AssetLoader.class.getResource(path).toURI();
		Path myPath;

		if (uri.getScheme().equals("jar")) {
			final FileSystem fileSystem = getFileSystem(uri);
			myPath = fileSystem.getPath(path);
		} else myPath = Paths.get(uri);
		final Stream<Path> walk = Files.walk(myPath, 1);
		for (final Iterator<Path> it = walk.iterator(); it.hasNext();) {
			final String next = it.next().toString();

			if (next.endsWith("." + ext)) itemFileNames.add(next);
		}

		walk.close();

		return itemFileNames;

	}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
private void appendStackTrace(StringBuilder log, ThrowableProxy proxy) {
    if (proxy != null) {
        Stream<StackTraceElementProxy> trace = Arrays.stream(proxy.getStackTraceElementProxyArray());

        trace.forEach(step -> {
            String string = step.toString();

            log.append(CoreConstants.TAB).append(string);

            ThrowableProxyUtil.subjoinPackagingData(log, step);

            log.append(CoreConstants.LINE_SEPARATOR);
        });

        trace.close();
    }
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
/**
 * Method to obtain the paths to all files in a directory specified
 * by a path. This should work in an ordinary file system
 * as well as a (possibly nested) JAR file.
 * 
 * @param path path to a directory (may be contained in a JAR file) 
 * @return a sequence of paths or {@code null} if the specified path 
 * is not a directory
 */
public static Path[] listResources(Path path) {
	// with help from http://stackoverflow.com/questions/1429172/how-do-i-list-the-files-inside-a-jar-file, #10
	if (!Files.isDirectory(path)) {
		throw new IllegalArgumentException("path is not a directory: " + path.toString());
	}
	
	List<Path> pathList = new ArrayList<Path>();
	Stream<Path> walk = null;
	try {
		walk = Files.walk(path, 1);
	} catch (IOException e) {
		e.printStackTrace();
	}

	for (Iterator<Path> it = walk.iterator(); it.hasNext();){
		Path p = it.next();
		if (Files.isRegularFile(p) && Files.isReadable(p)) {
			pathList.add(p);
		}
	}
	walk.close();
	return pathList.toArray(new Path[0]);
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
private static List<String> getFileNamesFromFolder(Path folderPath)
{
	List<String> fileNames = new ArrayList<String>();
	try
	{
		Stream<Path> walk = Files.walk(folderPath, 1);
		for (Iterator<Path> it = walk.iterator(); it.hasNext();)
		{
			String fileName = it.next().getFileName().toString();
			if (fileName.endsWith(".json")) fileNames.add(fileName);
		}
		walk.close();
	}
	catch (Exception ex)
	{
		VillagerTradesMod.LOGGER.catching(ex);
	}
	return fileNames;
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
public void viewFileContent(String empFile) throws IOException{
Consumer<String> readStr = System.out::println;
Stream<String> content = null;
Path path = Paths.get(empFile);
  	content = Files.lines(path, Charset.defaultCharset());
  	content.map(String::toUpperCase)
  		   .forEach(readStr);
   content.close();
 }
 

import java.util.stream.Stream; //導入方法依賴的package包/類
public long countRecsInFile(String empFile) throws IOException{
long numWords = 0;
Stream<String> content = null;
Path path = Paths.get(empFile);
  	content = Files.lines(path, Charset.defaultCharset());
numWords = content
		.map(line -> Arrays.stream(line.split(" ")))
		.count();
     	content.close();
     	return numWords;
  }
 

import java.util.stream.Stream; //導入方法依賴的package包/類
public String searchFilesDir(String filePath, String extension) throws IOException{
	Path root = Paths.get(filePath);
	int depth = 3;
	Stream<Path> searchStream = Files.find(root, depth, (path, attr) ->
	        String.valueOf(path).endsWith(extension));
	String found = searchStream
	        .sorted()
	        .map(String::valueOf)
	        .collect(Collectors.joining(" / "));
	searchStream.close();
	return found;
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
public static PlayerCollisionData playerCollision() {
	Stream<Entry<ImmutableWrapper<Circle>, PlayerCollisionData>> stream = enemyJudges.entrySet().parallelStream();
	mJudgeEntry = null;
	stream.forEach((entry) -> {
		if (entry.getValue().judgeCallback.getDamage() > 0 && entry.getKey().getData().contains(playerJudge)) {
			mJudgeEntry = entry;
		}
	});
	stream.close();
	return mJudgeEntry == null ? null : mJudgeEntry.getValue();
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
void closeResource() {
    Stream<?> a = (Stream<?>)RESOURCE.getAcquire(this);
    if (a != null) {
        a = (Stream<?>)RESOURCE.getAndSetAcquire(this, null);
        if (a != null) {
            a.close();
        }
    }
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
private void loadUserDict(Stream<String> stream) throws IOException {
    try {
        stream.forEach(line -> {
            Matcher matcher = RE_USERDICT.matcher(line.trim());
            if (matcher.find()) {
                String word = matcher.group(1).trim();
                String freqStr = matcher.group(2);
                int freq = 1;
                if (freqStr != null) {
                    freq = Integer.parseInt(freqStr.trim());
                } else {
                    double df = 1.;
                    for (String seg : this.cut(word, false, false)) {
                        df *= this.freq.getOrDefault(seg, 1) / total;
                    }
                    freq = Math.max((int) (df * total) + 1, this.freq.getOrDefault(word, 1));
                }

                this.freq.put(word, freq);
                this.total += freq;

                for (int i = 1; i <= word.length(); i++) {
                    String wfrag = word.substring(0, i);
                    if (!this.freq.containsKey(wfrag)) {
                        this.freq.put(wfrag, 0);
                    }
                }
            }
        });
    } finally {
        stream.close();
    }
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
void runTest(Stream<Path> inputs) {
    JavacTool tool = JavacTool.create();
    try (JavacFileManager fm = tool.getStandardFileManager(null, null, null)) {
        Path classes = Paths.get(System.getProperty("test.classes"));
        Iterable<? extends JavaFileObject> reconFiles =
                fm.getJavaFileObjectsFromFiles(inputs.sorted().map(p -> p.toFile()) :: iterator);
        List<String> options = Arrays.asList("-classpath", classes.toAbsolutePath().toString());
        JavacTask reconTask = tool.getTask(null, fm, null, options, null, reconFiles);
        Iterable<? extends CompilationUnitTree> reconUnits = reconTask.parse();
        JavacTrees reconTrees = JavacTrees.instance(reconTask);
        SearchAnnotations scanner = new SearchAnnotations(reconTrees,
                                                          reconTask.getElements());
        List<JavaFileObject> validateFiles = new ArrayList<>();

        reconTask.analyze();
        scanner.scan(reconUnits, null);

        for (CompilationUnitTree cut : reconUnits) {
            validateFiles.add(ClearAnnotations.clearAnnotations(reconTrees, cut));
        }

        Context validateContext = new Context();
        TestDependencies.preRegister(validateContext);
        JavacTask validateTask =
                tool.getTask(null, fm, null, options, null, validateFiles, validateContext);

        validateTask.analyze();

        TestDependencies deps = (TestDependencies) Dependencies.instance(validateContext);

        if (!scanner.topLevel2Expected.equals(deps.topLevel2Completing)) {
            throw new IllegalStateException(  "expected=" + scanner.topLevel2Expected +
                                            "; actual=" + deps.topLevel2Completing);
        }
    } catch (IOException ex) {
        throw new IllegalStateException(ex);
    } finally {
        inputs.close();
    }
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
private List<Point2D> readCitiesFromFile() throws IOException {
    List<Point2D>  cities     = new ArrayList<>(8092);
    String         citiesFile = (Main.class.getResource("cities.txt").toExternalForm()).replace("file:", "");
    Stream<String> lines      = Files.lines(Paths.get(citiesFile));
    lines.forEach(line -> {
        String city[] = line.split(",");
        double[] xy = World.latLonToXY(Double.parseDouble(city[1]), Double.parseDouble(city[2]));
        cities.add(new Point2D(xy[0], xy[1]));
    });
    lines.close();
    return cities;
}
 

import java.util.stream.Stream; //導入方法依賴的package包/類
private List<Point> readCitiesFromFile() throws IOException {
    List<Point>  cities     = new ArrayList<>(8092);
    String         citiesFile = (WorldHeatMapTest.class.getResource("cities.txt").toExternalForm()).replace("file:", "");
    Stream<String> lines      = Files.lines(Paths.get(citiesFile));
    lines.forEach(line -> {
        String city[] = line.split(",");
        double[] xy = World.latLonToXY(Double.parseDouble(city[1]), Double.parseDouble(city[2]));
        cities.add(new Point(xy[0], xy[1]));
    });
    lines.close();
    return cities;
}