Example usage for java.nio.channels FileChannel size

Introduction

In this page you can find the example usage for java.nio.channels FileChannel size.

Prototype

public abstract long size() throws IOException;

Source Link

Document

Returns the current size of this channel's file.

Usage

From source file:Main.java

public static void backupDb(File currentDB) {
    try {//from w w w .ja v a  2s. c o  m

        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            File f = new File(sd.getAbsolutePath() + "/AccountManagement");
            if (!f.exists()) {
                f.mkdir();
            }
            Date currentDate = new Date();
            String currentDateStr = newFormat1.format(currentDate);

            currentDateStr = currentDateStr.trim();
            System.out.println(
                    "---------------------------------------------------------------" + currentDateStr);
            String backupDBPath = "AccountManagement/backup_" + currentDateStr + ".db";
            File backupDB = new File(sd, backupDBPath);

            if (currentDB.exists()) {
                FileChannel src = new FileInputStream(currentDB).getChannel();
                FileChannel dst = new FileOutputStream(backupDB).getChannel();
                dst.transferFrom(src, 0, src.size());
                src.close();
                dst.close();
            }
        }
    } catch (Exception e) {
        System.out.println(e);
    }
}

From source file:FileUtils.java

public static void copyFile(File in, File out) throws IOException {
    FileChannel inChannel = new FileInputStream(in).getChannel();
    FileChannel outChannel = new FileOutputStream(out).getChannel();
    try {//from ww w  .  ja v  a2 s .  c o m
        // magic number for Windows, 64Mb - 32Kb)
        int maxCount = (64 * 1024 * 1024) - (32 * 1024);
        long size = inChannel.size();
        long position = 0;
        while (position < size) {
            position += inChannel.transferTo(position, maxCount, outChannel);
        }
    } catch (IOException e) {
        throw e;
    } finally {
        if (inChannel != null)
            inChannel.close();
        if (outChannel != null)
            outChannel.close();
    }
}

From source file:Main.java

public static void copyFileFast(File in, File out) {
    FileChannel filein = null;
    FileChannel fileout = null;//from  ww  w.  j a v  a  2  s .c o  m
    try {
        filein = new FileInputStream(in).getChannel();
        fileout = new FileOutputStream(out).getChannel();
        filein.transferTo(0, filein.size(), fileout);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        closeIO(filein, fileout);
    }
}

From source file:Main.java

public static void copyFile(@NonNull String pathFrom, @NonNull String pathTo) throws IOException {
    FileChannel outputChannel = null;
    FileChannel inputChannel = null;
    try {/*w  ww .j a  va2 s  . co  m*/
        inputChannel = new FileInputStream(new File(pathFrom)).getChannel();
        outputChannel = new FileOutputStream(new File(pathTo)).getChannel();
        inputChannel.transferTo(0, inputChannel.size(), outputChannel);
        inputChannel.close();
    } finally {
        if (inputChannel != null)
            inputChannel.close();
        if (outputChannel != null)
            outputChannel.close();
    }

}

From source file:edu.usf.cutr.siri.SiriParserJacksonExample.java

/**
 * Read in input file to string/*  ww w . j  av  a  2 s. c  o m*/
 * @param file file containing the JSON or XML data
 * @return String representation of the JSON or XML file
 * @throws IOException
 */
private static String readFile(File file) throws IOException {
    FileInputStream stream = new FileInputStream(file);
    try {
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        return Charset.defaultCharset().decode(bb).toString();
    } finally {
        stream.close();
    }
}

From source file:Grep.java

public static void setFile(File f) throws IOException {
    FileInputStream fis = new FileInputStream(f);
    FileChannel fc = fis.getChannel();

    // Get the file's size and then map it into memory
    int sz = (int) fc.size();
    MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, sz);
    // Decode the file into a char buffer
    indexFile = decoder.decode(bb);/*from   w w w  .j  a  va 2  s  . co  m*/

    fc.close();
}

From source file:Main.java

public static void copyFileUsingFileChannels(File source, File dest) throws IOException {
    FileChannel inputChannel = null;
    FileChannel outputChannel = null;
    try {/* w ww .  j  av  a  2s. co m*/
        inputChannel = new FileInputStream(source).getChannel();
        outputChannel = new FileOutputStream(dest).getChannel();
        outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
    } finally {
        inputChannel.close();
        outputChannel.close();
    }
}

From source file:Main.java

private static void copyFileUsingFileChannels(File source, File dest) throws IOException {
    FileChannel inputChannel = null;
    FileChannel outputChannel = null;
    try {/* ww w. j av  a2 s .co m*/
        inputChannel = new FileInputStream(source).getChannel();
        outputChannel = new FileOutputStream(dest).getChannel();
        outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
    } finally {
        if (inputChannel != null)
            inputChannel.close();
        if (outputChannel != null)
            outputChannel.close();
    }
}

From source file:Main.java

public static void copyFile(File sourceFile, File destFile) throws IOException {
    if (!destFile.exists()) {
        destFile.createNewFile();//w ww.j a  v  a 2s .co  m
    }

    FileChannel source = null;
    FileChannel destination = null;

    try {
        source = new FileInputStream(sourceFile).getChannel();
        destination = new FileOutputStream(destFile).getChannel();
        destination.transferFrom(source, 0, source.size());
    } finally {
        if (source != null) {
            source.close();
        }
        if (destination != null) {
            destination.close();
        }
    }
}

From source file:asia.gkc.vneedu.utils.FileUtil.java

/**
 * //from  w w w.  j  a v a  2 s  .  c o m
 *
 * @param source - ?
 * @param destination - ?
 * @return ??
 * @throws IOException
 */
public static boolean transferFile(File source, File destination) throws IOException {
    if (!destination.exists()) {
        logger.debug(destination.getPath());
        destination.createNewFile();
    }

    FileChannel src, dest;

    src = new FileInputStream(source).getChannel();
    dest = new FileOutputStream(destination).getChannel();

    long count = 0;
    long size = src.size();

    while ((count += dest.transferFrom(src, count, size - count)) < size)
        ;

    return true;
}