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:Main.java

private static String readTemplate(String templatePath) {
    try {//from  w ww .  j  a v a 2s  .c om
        return new Scanner(new File(templatePath)).useDelimiter("\\Z").next();
    } catch (FileNotFoundException e) {
        System.err.println("Template \"" + templatePath + "\" not found");
    }

    return null;
}

From source file:Main.java

private static Scanner wordScanner(String text) {
    Scanner s = new Scanner(text);
    s.useDelimiter(WHITESPACE_PATTERN);
    return s;
}

From source file:Main.java

public static List<String> asList(String source, String separator) {
    Scanner scanner = new Scanner(source);
    scanner.useDelimiter(separator);//from w  ww.  j a  v  a 2s.c  om
    List<String> list = new ArrayList<String>();
    while (scanner.hasNext()) {
        list.add(scanner.next());
    }
    return list;
}

From source file:Main.java

public static String readFileAsset(Context ctx, String filename) throws IOException {
    StringBuilder builder = new StringBuilder();

    Scanner s = new Scanner(ctx.getAssets().open(filename));
    while (s.hasNextLine()) {
        builder.append(s.nextLine());//ww  w . j av  a  2s.  co m
    }
    return builder.toString();
}

From source file:Main.java

public static String readFile(String pathname) {
    File file = new File(pathname);
    StringBuilder fileContents = new StringBuilder((int) file.length());
    String lineSeparator = System.getProperty("line.separator");

    try {/*  w  w w .j a v a  2 s  .  co m*/
        try (Scanner scanner = new Scanner(file)) {
            while (scanner.hasNextLine()) {
                fileContents.append(scanner.nextLine()).append(lineSeparator);
            }
            return fileContents.toString();
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    return "";
}

From source file:Main.java

public static float[][] readMatrix(String path) throws FileNotFoundException {
    int n = 0, p = 0;
    System.err.println("Load matrix from " + path);
    Scanner sc = new Scanner(new BufferedReader(new FileReader(path)));
    while (sc.hasNext()) {
        String line = sc.nextLine();
        if (line.startsWith("%")) {
            System.err.println(line);
        } else {/*  ww  w  . jav a 2 s .  c o m*/
            String[] dim = line.split(" ");
            n = Integer.parseInt(dim[0]);
            p = Integer.parseInt(dim[1]);
            System.err.println("num rows: " + n + "\n" + "num cols: " + p);
            break;
        }
    }
    int count = 0;
    float[][] mat = new float[p][n];
    int row = 0, col = 0;
    while (sc.hasNextLine()) {
        String line = sc.nextLine();
        if (line.isEmpty()) {
            break;
        }
        Float val = Float.parseFloat(line);
        mat[col][row] = val;
        row++;
        if (row == n) {
            row = 0;
            col++;
        }
        count++;
    }
    if (count != n * p) {
        System.err.println("Parse fail: not enough elements. num rows: " + n + "\n" + "num cols: " + p
                + "\n nun elements: " + count);
        return null;
    }
    System.err.println("Done.");
    return mat;
}

From source file:Main.java

public static double[][] readMatrixDouble(String path) throws FileNotFoundException {
    int n = 0, p = 0;
    System.err.println("Load matrix from " + path);
    Scanner sc = new Scanner(new BufferedReader(new FileReader(path)));
    while (sc.hasNext()) {
        String line = sc.nextLine();
        if (line.startsWith("%")) {
            System.err.println(line);
        } else {/* w w  w. j  av a  2 s .c o m*/
            String[] dim = line.split(" ");
            n = Integer.parseInt(dim[0]);
            p = Integer.parseInt(dim[1]);
            System.err.println("num rows: " + n + "\n" + "num cols: " + p);
            break;
        }
    }
    int count = 0;
    double[][] mat = new double[p][n];
    int row = 0, col = 0;
    while (sc.hasNextLine()) {
        String line = sc.nextLine();
        if (line.isEmpty()) {
            break;
        }
        Double val = Double.parseDouble(line);
        mat[col][row] = val;
        row++;
        if (row == n) {
            row = 0;
            col++;
        }
        count++;
    }
    if (count != n * p) {
        System.err.println("Parse fail: not enough elements. num rows: " + n + "\n" + "num cols: " + p
                + "\n nun elements: " + count);
        return null;
    }
    System.err.println("Done.");
    return mat;
}

From source file:Main.java

public static double[] readVectorDouble(String path) throws FileNotFoundException {
    ArrayList<Double> arr = new ArrayList<Double>();
    System.err.println("Load vector from " + path);
    Scanner sc = new Scanner(new BufferedReader(new FileReader(path)));
    while (sc.hasNext()) {
        String line = sc.nextLine();
        if (line.isEmpty()) {
            break;
        }/*from w  w w . jav a  2  s  . co  m*/
        if (line.startsWith("%%")) { // detect matrix market format
            System.err.println(line);
            while (sc.nextLine().startsWith("%"))
                ; // skip the comment line, and the dimension info.
            continue;
        }
        arr.add(Double.parseDouble(line));
    }
    System.err.println("Length: " + arr.size());
    double[] ret = new double[arr.size()];
    for (int i = 0; i < arr.size(); i++)
        ret[i] = arr.get(i);
    System.err.println("Done.");
    return ret;
}

From source file:Main.java

public static String[][] tsvToArray(File f, int columns, boolean useFirstLine) throws FileNotFoundException {
    List<String[]> rows = new LinkedList<String[]>();
    Scanner in = new Scanner(f);
    if (!useFirstLine && in.hasNextLine())
        in.nextLine();/* w w  w  .j a v  a 2 s .  c  o m*/

    while (in.hasNextLine()) {
        String[] tokens = in.nextLine().split("\t");
        if (columns > 0 && tokens.length < columns)
            continue;
        rows.add(tokens);
    }
    in.close();
    return rows.toArray(new String[0][]);
}

From source file:Main.java

/**
 * Reads a file relative to the dir this app was started from.
 * @param filename relative filename to load
 * @return entire file as a String//from   ww  w .  j  a v a 2s.c o m
 * @throws FileNotFoundException if file not found!
 */
public static String readFile(String filename) throws FileNotFoundException {

    String startDir = System.getProperty("user.dir");
    File propertyFile = new File(startDir, filename);

    Scanner scan = new Scanner(new FileInputStream(propertyFile));
    scan.useDelimiter("\\Z");
    String content = scan.next();
    scan.close();

    return content;
}