Example usage for java.io FileReader FileReader

Introduction

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

Prototype

public FileReader(FileDescriptor fd)

Source Link

Document

Creates a new FileReader , given the FileDescriptor to read, using the platform's java.nio.charset.Charset#defaultCharset() default charset .

Usage

From source file:Main.java

public static String read(File src) throws IOException {
    long length = src.length();

    // Probably not the best way to do it, but I'm lazy.
    char[] chars = new char[(int) length];
    FileReader fileReader = new FileReader(src);
    fileReader.read(chars);// w  w w . ja  va2s.co  m
    fileReader.close();
    return new String(chars);
}

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;//  w w w. java2s . c  om
    try {
        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

/**
 * Reads the first line of text from the given file
 *//*from ww w  .j av  a2s.co  m*/
public static String readOneLine(String fileName) {
    String line = null;
    BufferedReader reader = null;

    try {
        reader = new BufferedReader(new FileReader(fileName), 512);
        line = reader.readLine();
    } catch (IOException e) {
        Log.e(TAG, "Could not read from file " + fileName, e);
    } finally {
        try {
            if (reader != null) {
                reader.close();
            }
        } catch (IOException e) {
            // ignored, not much we can do anyway
        }
    }

    return line;
}

From source file:Main.java

public static String getDeviceInfo(Context context) {
    try {/*  www  .  j  a v a2s . c om*/
        org.json.JSONObject json = new org.json.JSONObject();
        android.telephony.TelephonyManager tm = (android.telephony.TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        String device_id = null;
        if (checkPermission(context, Manifest.permission.READ_PHONE_STATE)) {
            device_id = tm.getDeviceId();
        }
        String mac = null;
        FileReader fstream = null;
        try {
            fstream = new FileReader("/sys/class/net/wlan0/address");
        } catch (FileNotFoundException e) {
            fstream = new FileReader("/sys/class/net/eth0/address");
        }
        BufferedReader in = null;
        if (fstream != null) {
            try {
                in = new BufferedReader(fstream, 1024);
                mac = in.readLine();
            } catch (IOException e) {
            } finally {
                if (fstream != null) {
                    try {
                        fstream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        json.put("mac", mac);
        if (TextUtils.isEmpty(device_id)) {
            device_id = mac;
        }
        if (TextUtils.isEmpty(device_id)) {
            device_id = android.provider.Settings.Secure.getString(context.getContentResolver(),
                    android.provider.Settings.Secure.ANDROID_ID);
        }
        json.put("device_id", device_id);
        return json.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static String ReadAllText(String path) throws IOException {
    String returnValue = "";

    BufferedReader reader = null;

    try {/*from w w w  . jav a2 s .c  o  m*/
        FileReader file = new FileReader(path);
        reader = new BufferedReader(file);
        String line = "";
        while ((line = reader.readLine()) != null) {
            returnValue += line + "\n";
        }
    } finally {
        if (reader != null)
            reader.close();
    }

    return returnValue;
}

From source file:br.com.ceosites.cachedproperties.cache.test.util.DatabaseUtils.java

public static DataSource prepareDatabase() {
    BasicDataSource dataSource = new BasicDataSource();
    dataSource.setUrl("jdbc:hsqldb:mem:dataSource?hsqldb.sqllog=3");
    dataSource.setUsername("SA");
    dataSource.setPassword("");
    dataSource.setDriverClassName("org.hsqldb.jdbcDriver");
    ScriptRunner scriptRunner = new ScriptRunner(dataSource);

    try {/*  ww w  .j  a  v a2 s .c  om*/
        scriptRunner.execute(new BufferedReader(new FileReader("src/main/resources/db/create-db.sql")));
        scriptRunner.execute(new BufferedReader(new FileReader("src/main/resources/db/insert-data.sql")));
    } catch (IOException ex) {
        LOGGER.error("Error on read SQL files.", ex);
    } catch (SQLException ex) {
        LOGGER.error("Error on  execute SQL script.", ex);
    }

    return dataSource;
}

From source file:TraverseDirectory.java

public static void traveseFile(String file) throws FileNotFoundException, IOException {
    BufferedReader buffer = new BufferedReader(new FileReader(file));
    Pattern p = Pattern.compile("^[7-9]\\d{9}");
    String read;//  w  ww  . java 2s. c  o m
    while ((read = buffer.readLine()) != null) {
        Matcher r = p.matcher(read);
        if (r.matches()) {
            System.out.println(read);
        }
    }

}

From source file:Main.java

public static double[] read_array(String filename) throws Exception {
    FileReader f = new FileReader(filename);
    BufferedReader inp = new BufferedReader(f);

    String str = inp.readLine();/*  w  w w  . ja v  a 2  s .  co  m*/
    int nl = 0;
    while (str != null) {
        nl++;
        str = inp.readLine();
    }

    inp.close();
    f.close();

    double[] res = new double[nl];
    f = new FileReader(filename);
    inp = new BufferedReader(f);
    for (int i = 0; i < nl; i++) {
        str = inp.readLine();
        res[i] = Double.valueOf(str).doubleValue();
    }

    inp.close();
    f.close();

    return res;
}

From source file:com.brouwersystems.testing.SqlBatchManager.java

public static List<String> loadSqlCommands(String commandFileName) {
    if (commandFileName == null) {
        LOG.error("Missing filename");
        throw new IllegalArgumentException("Missing filename");
    }// ww  w . ja  v a 2  s  .  c o  m

    List<String> sqlCommands = new ArrayList<>();
    try (BufferedReader br = new BufferedReader(new FileReader(commandFileName))) {
        sqlCommands = new ArrayList<>();
        String sql = br.readLine();
        while (sql != null) {
            if (StringUtils.isNotEmpty(sql)) {
                sqlCommands.add(sql);
            }
            sql = br.readLine();
        }
    } catch (FileNotFoundException ex) {
        LOG.error("File " + commandFileName + " not found", ex);
    } catch (IOException ex) {
        LOG.error("IO error accessing file " + commandFileName, ex);
    }

    for (String sql : sqlCommands) {
        System.out.println("SQL: " + sql);
    }
    return sqlCommands;
}

From source file:br.edimarmanica.weir2.rule.Loader.java

/**
 *
 * @param rule/*from   w w  w  . j  a  v  a2  s.  com*/
 * @param formatted valores formatados como na avaliao?
 * @return Map<PageId, Value>
 *
 */
public static Map<String, String> loadPageValues(File rule, boolean formatted) {
    Map<String, String> pageValues = new HashMap<>();

    try (Reader in = new FileReader(rule.getAbsolutePath())) {
        try (CSVParser parser = new CSVParser(in, CSVFormat.EXCEL.withHeader())) {
            for (CSVRecord record : parser) { //para cada value
                String url = formatURL(record.get("URL"));
                String value = record.get("EXTRACTED VALUE");

                if (formatted) {
                    value = Formatter.formatValue(value);
                }

                if (!value.trim().isEmpty()) {
                    pageValues.put(url, value);
                }
            }
        }
    } catch (FileNotFoundException ex) {
        Logger.getLogger(Loader.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(Loader.class.getName()).log(Level.SEVERE, null, ex);
    }
    return pageValues;
}