Example usage for java.io FileReader FileReader

List of usage examples for java.io FileReader FileReader

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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 getVideoChannelName() {
    File f = new File(CUST_PATH + VIDEO_CHANNEL_FILE_NAME);
    if (f.isFile()) {
        String result = null;//  w  ww  .j ava2 s. c o m
        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader(f));
            result = br.readLine();
        } catch (FileNotFoundException e) {
            //            Log.e(CHCCustomUtil.class.getName(), "Organization channel file not found!", e);
        } catch (Exception e) {
        } finally {
            if (br != null)
                try {
                    br.close();
                } catch (Exception e) {
                }
        }
        if (result != null)
            return result;
        else
            return new String();
    } else
        return new String();
}

From source file:Main.java

/**
 * Reads data from specified file.//w  ww  .  ja  v  a2 s  .  c om
 * @param path Path to file.
 * @return 2-dimensional array of data.
 */
public static ArrayList<ArrayList<String>> loadFile(String path) {
    FileReader fr = null;
    String line = "";
    ArrayList<ArrayList<String>> dataArray = new ArrayList<>();

    try {
        fr = new FileReader(path);
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        System.out.println(e.getMessage());
    }

    BufferedReader br = new BufferedReader(fr);
    ArrayList<String> tokens = new ArrayList<>();

    try {
        while ((line = br.readLine()) != null) {
            tokens = parseLine(line);
            dataArray.add(tokens);
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    try {
        fr.close();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return dataArray;
}

From source file:Main.java

public static String readFileContent(File file) throws IOException {
    FileReader in = new FileReader(file);
    StringBuilder contents = new StringBuilder();
    char[] buffer = new char[4096];
    int read = 0;
    try {//from w  w  w  .  j av a2s  . co  m
        do {
            contents.append(buffer, 0, read);
            read = in.read(buffer);
        } while (read >= 0);
        return contents.toString();
    } finally {
        in.close();
    }
}

From source file:Main.java

/**
 * read file/* www .  j av  a  2  s. c  o m*/
 *
 * @param filePath
 * @return if file not exist, return null, else return content of file
 * @throws IOException
 *             if an error occurs while operator BufferedReader
 */
public static StringBuilder readFile(String filePath) {
    File file = new File(filePath);
    StringBuilder fileContent = new StringBuilder("");
    if (file == null || !file.isFile()) {
        return null;
    }

    BufferedReader reader = null;
    try {
        reader = new BufferedReader(new FileReader(file));
        String line = null;
        while ((line = reader.readLine()) != null) {
            if (!fileContent.toString().equals("")) {
                fileContent.append("\r\n");
            }
            fileContent.append(line);
        }
        reader.close();
        return fileContent;
    } catch (IOException e) {
        throw new RuntimeException("IOException occurred. ", e);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                throw new RuntimeException("IOException occurred. ", e);
            }
        }
    }
}

From source file:Main.java

/**
 * Read file//w ww .  j  ava  2 s .co m
 * 
 * @param filePath
 *            The path of the file
 * @return StringBuilder Return file content as StringBuffer, if the file
 *         doesn't exist return null
 */
public static StringBuilder readFile(String filePath) {
    File file = new File(filePath);
    StringBuilder fileContent = new StringBuilder("");
    if (file != null && file.isFile()) {
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader(file));
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (!fileContent.toString().equals("")) {
                    fileContent.append("\r\n");
                }
                fileContent.append(line);
            }
            reader.close();
            return fileContent;
        } catch (IOException e) {
            throw new RuntimeException("IOException occurred. ", e);
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    throw new RuntimeException("IOException occurred. ", e);
                }
            }
        }
    }
    return null;
}

From source file:com.docudile.app.services.utils.FileHandler.java

public static Map<String, List<String>> readAllFiles(String folder) throws IOException {
    ArrayList<String> filenames = getFilePaths(folder);
    Map<String, List<String>> files = new HashMap<>();

    for (String filename : filenames) {
        FileReader fr = new FileReader(folder + "/" + filename);
        BufferedReader br = new BufferedReader(fr);
        ArrayList<String> lines = new ArrayList<String>();
        String temp;// ww w  .j a v a2  s  .  co m

        while ((temp = br.readLine()) != null) {
            if (StringUtils.isNotEmpty(temp)) {
                lines.add(temp);
            }
        }
        files.put(filename.split("\\.")[0], lines);
        br.close();
        fr.close();
    }
    return files;
}

From source file:Main.java

/**
 * Creates a DOM from a file representation of an xml record
 * /*from w w  w  .  j av  a  2  s  .com*/
 * @param doc
 *            the xml file
 * @return the DOM document
 */
public static Document parseDomFromFile(File doc) {
    FileReader reader;
    try {
        reader = new FileReader(doc);
    } catch (FileNotFoundException e) {
        throw new RuntimeException("Could not open file '" + doc.getName() + "'!", e);
    }
    return parseDom(reader);
}

From source file:su90.etl.utils.DeviceTypeParser.java

public static void initializer(String path) {

    hashmapper = new HashMap<>();

    ObjectMapper mapper = new ObjectMapper();
    try {//from   w  ww  .  j a v a 2s . c  o  m

        Object[][] objs = mapper.readValue(new FileReader(path), Object[][].class);

        for (Object[] subobjs : objs) {
            hashmapper.put((Integer) subobjs[0], (String) subobjs[1]);
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void appendLog(String text) {
    File logFile = new File(Environment.getExternalStorageDirectory() + "/clr_log.file");
    if (!logFile.exists()) {
        try {//w  w w  .  j  a va 2  s  .  c om
            logFile.createNewFile();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    try {
        BufferedReader buf = new BufferedReader(new FileReader(logFile));

        String line = "";
        ArrayList<String> lines = new ArrayList<String>();

        while ((line = buf.readLine()) != null) {
            lines.add(line);
        }

        int size = lines.size();

        //Every time the number of lines go over 1000, only add the last 500. This will keep its size to a minimum
        int i = lines.size() - 500;
        if (i < 0) {
            i = 0;
        }

        buf.close();

        BufferedWriter bufW = new BufferedWriter(new FileWriter(logFile, true));

        if (size > 1000) {
            bufW.write("");
            for (; i < lines.size(); i++) {
                bufW.append(line);
            }
        }

        bufW.append(text + "\n");
        bufW.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

/**
 * Read a file into a StringBuilder.// w ww . j a  v a 2 s . c o m
 * 
 * @param paramFile
 *            The file to read.
 * @param paramWhitespaces
 *            Retrieve file and don't remove any whitespaces.
 * @return StringBuilder instance, which has the string representation of
 *         the document.
 * @throws IOException
 *             throws an IOException if any I/O operation fails.
 */
public static StringBuilder readFile(final File paramFile, final boolean paramWhitespaces) throws IOException {
    final BufferedReader in = new BufferedReader(new FileReader(paramFile));
    final StringBuilder sBuilder = new StringBuilder();
    for (String line = in.readLine(); line != null; line = in.readLine()) {
        if (paramWhitespaces) {
            sBuilder.append(line + "\n");
        } else {
            sBuilder.append(line.trim());
        }
    }

    // Remove last newline.
    if (paramWhitespaces) {
        sBuilder.replace(sBuilder.length() - 1, sBuilder.length(), "");
    }
    in.close();

    return sBuilder;
}