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:MainClass.java

public static void main(String[] args) throws Exception {
    File fromFile = new File("fromFile.txt");
    File toFile = new File("toFile.txt");
    FileInputStream inFile = new FileInputStream(fromFile);
    FileOutputStream outFile = new FileOutputStream(toFile);
    FileChannel inChannel = inFile.getChannel();
    FileChannel outChannel = outFile.getChannel();
    int bytesWritten = 0;
    long byteCount = inChannel.size();
    while (bytesWritten < byteCount) {
        bytesWritten += inChannel.transferTo(bytesWritten, byteCount - bytesWritten, outChannel);
    }//  w ww  . j  a v  a2s. co m
    inFile.close();
    outFile.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String fromFileName = "from.txt";
    String toFileName = "to.txt";
    FileChannel in = new FileInputStream(fromFileName).getChannel();
    FileChannel out = new FileOutputStream(toFileName).getChannel();
    in.transferTo(0, (int) in.size(), out);
    in.close();/*from  w ww  .  j  a v  a 2 s  .  c  o  m*/
    out.close();
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String fromFileName = args[0];
    String toFileName = args[1];//from w  ww .  j a  va2  s .co m
    FileChannel in = new FileInputStream(fromFileName).getChannel();
    FileChannel out = new FileOutputStream(toFileName).getChannel();
    in.transferTo(0, (int) in.size(), out);
    in.close();
    out.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    FileChannel roChannel = new RandomAccessFile(file, "r").getChannel();
    ByteBuffer readonlybuffer = roChannel.map(FileChannel.MapMode.READ_ONLY, 0, (int) roChannel.size());

    FileChannel rwChannel = new RandomAccessFile(file, "rw").getChannel();
    ByteBuffer writeonlybuffer = rwChannel.map(FileChannel.MapMode.READ_WRITE, 0, (int) rwChannel.size());

    // Create a private (copy-on-write) memory-mapped file.
    FileChannel pvChannel = new RandomAccessFile(file, "rw").getChannel();

    ByteBuffer privatebuffer = roChannel.map(FileChannel.MapMode.READ_WRITE, 0, (int) rwChannel.size());

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    FileChannel srcChannel = new FileInputStream("srcFilename").getChannel();
    FileChannel dstChannel = new FileOutputStream("dstFilename").getChannel();

    dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
    srcChannel.close();//from  ww w . ja  va2 s  . c  om
    dstChannel.close();
}

From source file:MainClass.java

public static void main(String[] args) throws IOException {

    FileInputStream inFile = new FileInputStream(args[0]);
    FileOutputStream outFile = new FileOutputStream(args[1]);

    FileChannel inChannel = inFile.getChannel();
    FileChannel outChannel = outFile.getChannel();

    FileLock outLock = outChannel.lock();
    FileLock inLock = inChannel.lock(0, inChannel.size(), true);

    inChannel.transferTo(0, inChannel.size(), outChannel);

    outLock.release();/*w  w w.  j a va  2  s  .com*/
    inLock.release();

    inChannel.close();
    outChannel.close();
}

From source file:ExplicitChannelRead.java

public static void main(String args[]) {
    FileInputStream fIn;/*from  w ww  . jav a2 s  .  co  m*/
    FileChannel fChan;
    long fSize;
    ByteBuffer mBuf;

    try {
        fIn = new FileInputStream("test.txt");
        fChan = fIn.getChannel();
        fSize = fChan.size();
        mBuf = ByteBuffer.allocate((int) fSize);
        fChan.read(mBuf);
        mBuf.rewind();
        for (int i = 0; i < fSize; i++)
            System.out.print((char) mBuf.get());
        fChan.close();
        fIn.close();
    } catch (IOException exc) {
        System.out.println(exc);
        System.exit(1);
    }
}

From source file:MappedChannelRead.java

public static void main(String args[]) {
    FileInputStream fIn;//  w ww .jav a  2 s.  co  m
    FileChannel fChan;
    long fSize;
    MappedByteBuffer mBuf;

    try {
        fIn = new FileInputStream("test.txt");
        fChan = fIn.getChannel();
        fSize = fChan.size();
        mBuf = fChan.map(FileChannel.MapMode.READ_ONLY, 0, fSize);
        for (int i = 0; i < fSize; i++)
            System.out.print((char) mBuf.get());

        fChan.close();
        fIn.close();
    } catch (IOException exc) {
        System.out.println(exc);
        System.exit(1);
    }
}

From source file:MainClass.java

public static void main(String args[]) {
    FileInputStream fIn;//from ww  w.  j a va2  s . c o  m
    FileChannel fChan;
    long fSize;
    ByteBuffer mBuf;

    try {
        fIn = new FileInputStream("test.txt");

        fChan = fIn.getChannel();

        fSize = fChan.size();

        mBuf = ByteBuffer.allocate((int) fSize);

        fChan.read(mBuf);

        mBuf.rewind();

        for (int i = 0; i < fSize; i++)
            System.out.print((char) mBuf.get());
        fChan.close();
        fIn.close();
    } catch (IOException exc) {
        System.out.println(exc);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {

    FileChannel sourceChannel = new FileInputStream("sourceFile").getChannel();
    FileChannel sinkChannel = new FileOutputStream("newFile").getChannel();

    // Copy source file contents to the sink file
    sourceChannel.transferTo(0, sourceChannel.size(), sinkChannel);
}