Example usage for java.util Scanner Scanner

Introduction

In this page you can find the example usage for java.util Scanner Scanner.

Prototype

public Scanner(ReadableByteChannel source)

Source Link

Document

Constructs a new Scanner that produces values scanned from the specified channel.

Usage

From source file:com.cocktail.initializer.ItemReader.java

/**
 * Read items./*from   w  w w  .  j av  a2 s  . c  om*/
 *
 * @param <I>
 *            the generic type
 * @param path
 *            the path
 * @param itemMapper
 *            the item mapper
 * @return the list
 * @throws Exception
 *             the exception
 */
public static <I> List<I> readItems(String path, FieldSetMapper<I> itemMapper) throws Exception {

    ClassPathResource resource = new ClassPathResource(path);
    Scanner scanner = new Scanner(resource.getInputStream());
    String line = scanner.nextLine();
    scanner.close();

    FlatFileItemReader<I> itemReader = new FlatFileItemReader<I>();
    itemReader.setResource(resource);

    // DelimitedLineTokenizer defaults to | as its delimiter
    DelimitedLineTokenizer tokenizer = new DelimitedLineTokenizer("|");
    tokenizer.setNames(line.split("\\|"));
    tokenizer.setStrict(false);

    DefaultLineMapper<I> lineMapper = new DefaultLineMapper<I>();
    lineMapper.setLineTokenizer(tokenizer);
    lineMapper.setFieldSetMapper(itemMapper);
    itemReader.setLineMapper(lineMapper);
    itemReader.setRecordSeparatorPolicy(new DefaultRecordSeparatorPolicy());
    itemReader.setLinesToSkip(1);
    itemReader.open(new ExecutionContext());

    List<I> items = new ArrayList<>();
    I item = null;

    do {

        item = itemReader.read();

        if (item != null) {
            items.add(item);
        }

    } while (item != null);

    return items;
}

From source file:io.fabric8.vertx.maven.plugin.utils.Prompter.java

public void startInteraction() {
    scanner = new Scanner(System.in);
}

From source file:com.taobao.datax.engine.tools.JobConfGenDriver.java

private static int showChoice(String header, List<String> plugins) {
    System.out.println(header);//from   www.ja v a2 s  .c o  m

    int idx = 0;
    for (String plugin : plugins) {
        System.out.println(String.format("%d\t%s", idx++,
                plugin.toLowerCase().replace("reader", "").replace("writer", "")));
    }

    System.out.print(String.format("Please choose [%d-%d]: ", 0, plugins.size() - 1));

    try {
        idx = Integer.valueOf(new Scanner(System.in).nextLine());
    } catch (Exception e) {
        // TODO: handle exception
        idx = -1;
    }

    return idx;
}

From source file:hammingcode.HammingCode.java

ArrayList<String> readFile(String filename) throws FileNotFoundException {
    Scanner input = new Scanner(new File(filename));
    ArrayList<String> inputList = new ArrayList();
    while (input.hasNext()) {
        inputList.add(input.nextLine());
    }//from   w ww. j ava  2  s  . c o m
    return inputList;
}

From source file:de.uni_freiburg.informatik.ultimate.licence_manager.util.ProcessUtils.java

public static void inheritIO(final InputStream src, final PrintStream dest) {
    new Thread(new Runnable() {
        public void run() {
            final Scanner sc = new Scanner(src);
            while (sc.hasNextLine()) {
                dest.println(sc.nextLine());
            }/*from  w ww  . j a  va2 s  . com*/
            sc.close();
        }
    }).start();
}

From source file:ca.weblite.xmlvm.VtableHelper.java

/**
 * Tries to find the actual function to use for the given mangled method name in the 
 * given header file./*from w w w  . jav a 2 s . c o m*/
 * @param searchPaths  The paths to search for headers.
 * @param headerFile The header file in which to start the search.  Its name is used
 * as the base for the mangled function name.
 * @param mangledMethodName The mangled method name.  This should only be the portion
 * pertaining to the method - not the class portion of a mangled function name.  It will
 * be concatenated to headerFile.getName()+"_" to form the full function name.
 * @return Either a VTable ID (which will have the form XMLVM_VTABLE_IDX_{funcname}) or
 * the actual function name if there is no vtable index constant defined.
 * @throws IOException 
 */
public static String resolveVirtualMethod(Project project, Path searchPaths, File headerFile,
        String mangledMethodName) throws IOException {
    String mangledClassName = headerFile.getName().replaceAll("\\.h$", "");
    String funcName = mangledClassName + "_" + mangledMethodName;
    String headerContents = FileUtils.readFileToString(headerFile);
    Scanner scanner = new Scanner(headerContents);
    int state = 0;
    String superClassHeader = null;
    while (scanner.hasNextLine()) {
        String line = scanner.nextLine();
        if (state == 0 && line.startsWith("// Super Class:")) {
            state = 1;
        } else if (state == 1 && line.startsWith("#include \"")) {
            superClassHeader = line.substring(line.indexOf("\"") + 1, line.lastIndexOf("\""));
            state = 0;
            break;
        }
    }

    String idxConstant = "XMLVM_VTABLE_IDX_" + funcName;
    String idxConstantSp = idxConstant + " ";
    if (headerContents.indexOf(idxConstantSp) > 0) {
        return idxConstant;
    } else if (headerContents.indexOf(funcName + "(") > 0) {
        return funcName;
    } else if (superClassHeader != null) {
        for (String p : searchPaths.list()) {
            File d = new File(p);
            File h = new File(d, superClassHeader);
            if (h.exists()) {
                return resolveVirtualMethod(project, searchPaths, h, mangledMethodName);
            }
        }
        throw new RuntimeException("Failed to find header file " + superClassHeader);
    } else {
        throw new RuntimeException(
                "Failed to find virtual method " + mangledMethodName + " in header " + headerFile);
    }
}

From source file:hu.petabyte.redflags.PassEncoder.java

@Test
public void test() {
    BCryptPasswordEncoder e = new BCryptPasswordEncoder();
    Scanner s = new Scanner(System.in);
    String i;//ww w  . jav a  2 s. co  m
    while (!(i = s.nextLine()).isEmpty()) {
        System.out.println("ENC: " + e.encode(i));
    }
    s.close();
}

From source file:cpd3314.buildit12.CPD3314BuildIt12.java

/**
 * Build a program that asks the user for a filename. It then reads a file
 * line-by-line, and outputs its contents in uppercase.
 *
 * Make sure that the program exits gracefully when the file does not exist.
 *
 *//* ww w  . j  a v  a2s  . c om*/
public static void doBuildIt1() {
    // Prompt the User for a Filename
    Scanner kb = new Scanner(System.in);
    System.out.println("Filename: ");
    String filename = kb.next();

    try {
        // Attempt to Access the File, this may cause an Exception
        File file = new File(filename);
        Scanner input = new Scanner(file);

        // Iterate through the File and Output in Upper Case
        while (input.hasNext()) {
            System.out.println(input.nextLine().toUpperCase());
        }
    } catch (IOException ex) {
        // If the File is Not Found, Tell the User and Exit Gracefully
        System.err.println("File not found: " + filename);
    }
}

From source file:view.UserInteractor.java

public void run(String... args) throws Exception {
    System.out.println(" ### Payment Tracker ### ");

    Scanner in = new Scanner(System.in);
    tryLoadFile(in);/*from   ww  w.  ja va 2 s .c  o m*/
    tryLoadExchangeRates();
    Thread viewerThread = startViewerThread();
    userInputCycle(in);
    viewerThread.interrupt();
}

From source file:com.dalelotts.rpn.ScannerTest.java

@Test
public void hasNextReturnsFalseForEmptyString() throws Exception {
    // Given//from   w w w. ja  v a2  s.c  o  m
    try (final InputStream inputStream = IOUtils.toInputStream("", "UTF-8")) {
        scanner = new Scanner(inputStream);

        // When
        final boolean hasNext = scanner.hasNext();

        // Then
        assertThat(hasNext, is(false));
    }
}