Example usage for java.io LineNumberReader readLine

Introduction

In this page you can find the example usage for java.io LineNumberReader readLine.

Prototype

public String readLine() throws IOException 

Source Link

Document

Read a line of text.

Usage

From source file:Main.java

/**
 * Reads the first non-empty line from a file.
 *
 * @param file the file from which the line is to be read. This argument
 *   cannot be {@code null}./*w  ww .j  a v a2  s  .c om*/
 * @return the first non-empty line in the given file or {@code null} if
 *   there is no such line in the specified file
 *
 * @throws IOException thrown if there was an error while reading the
 *   specified file (e.g.: it does not exist)
 */
private static String readFirstLine(Path file) throws IOException {
    try (InputStream input = Files.newInputStream(file)) {
        LineNumberReader reader = new LineNumberReader(new InputStreamReader(input, DEFAULT_CHARSET));
        String line = reader.readLine();
        while (line != null) {
            line = line.trim();
            if (!line.isEmpty()) {
                return line;
            }
            line = reader.readLine();
        }
    }

    return null;
}

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From source file:Main.java

public static String getMac() {
    String mac = null;//w ww  . j  a va  2 s .  c  o  m
    String macSerial = null;
    String str = "";
    try {
        Process pp = Runtime.getRuntime().exec("cat /sys/class/net/wlan0/address");
        //            Process pp = Runtime.getRuntime().exec("cat /sys/class/net/eth0/address");
        InputStreamReader ir = new InputStreamReader(pp.getInputStream());
        LineNumberReader input = new LineNumberReader(ir);

        for (; null != str;) {
            str = input.readLine();
            if (str != null) {
                macSerial = str.trim();
                break;
            }
        }
    } catch (IOException ex) {
        ex.printStackTrace();
    }

    if (macSerial != null) {
        macSerial = macSerial.replace(":", "");
        macSerial = macSerial.replace("a", "A");
        macSerial = macSerial.replace("b", "B");
        macSerial = macSerial.replace("c", "C");
        macSerial = macSerial.replace("d", "D");
        macSerial = macSerial.replace("e", "E");
        mac = macSerial.replace("f", "F");
    }

    return mac;

}

---

From source file:com.porvak.bracket.social.jdbc.versioned.SqlDatabaseChange.java

private static String readScript(Resource resource) throws IOException {
    EncodedResource encoded = resource instanceof EncodedResource ? (EncodedResource) resource
            : new EncodedResource(resource);
    LineNumberReader lnr = new LineNumberReader(encoded.getReader());
    String currentStatement = lnr.readLine();
    StringBuilder scriptBuilder = new StringBuilder();
    while (currentStatement != null) {
        if (StringUtils.hasText(currentStatement)
                && (SQL_COMMENT_PREFIX != null && !currentStatement.startsWith(SQL_COMMENT_PREFIX))) {
            if (scriptBuilder.length() > 0) {
                scriptBuilder.append('\n');
            }//w w  w. jav a  2 s . c o  m
            scriptBuilder.append(currentStatement);
        }
        currentStatement = lnr.readLine();
    }
    return scriptBuilder.toString();
}

---

From source file:Diff.java

public static void readersAsText(Reader r1, String name1, Reader r2, String name2, List diffs)
        throws IOException {
    LineNumberReader reader1 = new LineNumberReader(r1);
    LineNumberReader reader2 = new LineNumberReader(r2);
    String line1 = reader1.readLine();
    String line2 = reader2.readLine();
    while (line1 != null && line2 != null) {
        if (!line1.equals(line2)) {
            diffs.add("File \"" + name1 + "\" and file \"" + name2 + "\" differ at line "
                    + reader1.getLineNumber() + ":" + "\n" + line1 + "\n" + line2);
            break;
        }/*from   w w  w  .  jav a 2s .  c  om*/
        line1 = reader1.readLine();
        line2 = reader2.readLine();
    }
    if (line1 == null && line2 != null)
        diffs.add("File \"" + name2 + "\" has extra lines at line " + reader2.getLineNumber() + ":\n" + line2);
    if (line1 != null && line2 == null)
        diffs.add("File \"" + name1 + "\" has extra lines at line " + reader1.getLineNumber() + ":\n" + line1);
}

---

From source file:Main.java

public static String readFileAsStr(File file) throws IOException {
    StringBuffer sb = new StringBuffer();
    if (file == null)
        return "";
    if (!file.exists())
        return "";

    LineNumberReader lnr = null;
    try {/*from   w w  w.  ja  va 2  s .c om*/
        lnr = new LineNumberReader(new FileReader(file));

        String s = lnr.readLine();
        while (s != null) {
            sb.append(s);
            s = lnr.readLine();
        }
    } catch (java.io.IOException ioe) {
        throw ioe;
    } finally {
        if (lnr != null) {
            lnr.close();
        }
    }
    return sb.toString();
}

---

From source file:Main.java

/**
 * Loads an index (Hashtable) from a file.
 * //from ww w .  ja  v a 2s .  c om
 * @param root_
 *            The file where the index is stored in.
 * @return The indextable.
 * @exception IOException
 *                If an internal error prevents the file from being read.
 */
public static Hashtable loadIndex(File root_, String name) throws IOException {
    File indexfile = new File(root_, name);
    Hashtable index = new Hashtable();
    if (indexfile.exists()) {
        LineNumberReader in = new LineNumberReader(new FileReader(indexfile));
        while (in.ready())
            index.put(in.readLine(), new Long(in.readLine()));
        in.close();
    }
    return index;
}

---

From source file:org.kawanfw.sql.jdbc.util.CallableUtil.java

public static CallableStatementHolder fromRsFile(File file, ConnectionHttp connectionHttp) throws SQLException {
    if (!file.exists()) {
        String message = Tag.PRODUCT_PRODUCT_FAIL + "Internal File does not exists: " + file;
        throw new SQLException(message, new IOException(message));
    }/*from   w  ww  .ja  v a 2 s. c o m*/

    String line = null;
    LineNumberReader lineNumberReader = null;

    try {
        lineNumberReader = new LineNumberReader(new FileReader(file));
        line = lineNumberReader.readLine();
    } catch (FileNotFoundException e) {
        String message = Tag.PRODUCT_PRODUCT_FAIL + "Internal File does not exists: " + file;
        throw new SQLException(message, new IOException(message));
    } catch (IOException e) {
        String message = Tag.PRODUCT_PRODUCT_FAIL + "I/O Error when reading file: " + file;
        throw new SQLException(message, new IOException(message));
    } finally {
        IOUtils.closeQuietly(lineNumberReader);
    }

    if (line == null) {
        String message = Tag.PRODUCT_PRODUCT_FAIL + "Internal File is empty: " + file;
        throw new SQLException(message, new IOException(message));
    }

    line = JsonLineDecryptor.decrypt(line, connectionHttp);

    return CallableStatementHolderTransportJson.fromJson(line);
}

---

From source file:org.kalypso.wspwin.core.WspWinProfProj.java

/** Reads the first line of a profproj.txt or .str file. Returns 2 ints: profile count + second count. */
public static int[] readStrHeader(final LineNumberReader reader) throws IOException, ParseException {
    final String firstLine = reader.readLine();
    if (firstLine == null || firstLine.length() == 0)
        throw new ParseException(Messages.getString("org.kalypso.wspwin.core.WspCfg.8"), //$NON-NLS-1$
                reader.getLineNumber());

    // ignore the values, we read the count from the linecount
    // just parse the type
    final StringTokenizer firstLineTokenizer = new StringTokenizer(firstLine);
    if (firstLineTokenizer.countTokens() < 2)
        throw new ParseException(Messages.getString("org.kalypso.wspwin.core.WspCfg.9"), //$NON-NLS-1$
                reader.getLineNumber());

    final int[] counts = new int[2];
    counts[0] = Integer.parseInt(firstLineTokenizer.nextToken());
    counts[1] = Integer.parseInt(firstLineTokenizer.nextToken());

    // if it is a .str file, we ignore the following name and waterName

    return counts;
}

---

From source file:com.l2jfree.gameserver.util.GPLLicenseChecker.java

private static List<String> read(File f) throws IOException {
    ArrayList<String> list = new ArrayList<String>();

    LineNumberReader lnr = null;
    try {//from w  ww .  j  av  a 2s  .c o  m
        lnr = new LineNumberReader(new FileReader(f));

        for (String line; (line = lnr.readLine()) != null;)
            list.add(line);
    } finally {
        IOUtils.closeQuietly(lnr);
    }

    int i = 0;
    for (; i < LICENSE.length; i++) {
        if (!list.get(i).equals(LICENSE[i])) {
            MODIFIED.add(f.getPath() + ":" + i);
            return list;
        }
    }

    if (!startsWithPackageName(list.get(i))) {
        MODIFIED.add(f.getPath() + ":" + lnr.getLineNumber());
        return list;
    }

    return null;
}

---

From source file:com.shmsoft.dmass.services.Util.java

public static int countLines(String filename) throws IOException {
    LineNumberReader reader = new LineNumberReader(new FileReader(filename));
    int cnt = 0;/*from   www. ja  va 2  s. c o  m*/
    String lineRead = "";
    while ((lineRead = reader.readLine()) != null) {
    }
    cnt = reader.getLineNumber();
    reader.close();
    return cnt;
}

---

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