Example usage for java.io RandomAccessFile length

Introduction

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

Prototype

public native long length() throws IOException;

Source Link

Document

Returns the length of this file.

Usage

From source file:Main.java

public static byte[] readFile(File f1) throws IOException {
    RandomAccessFile f = new RandomAccessFile(f1, "r");
    byte[] b = new byte[(int) f.length()];
    f.read(b);/* ww w  . j a  v a 2  s  .c  om*/
    f.close();
    return b;
}

From source file:Main.java

private static String readSaltFromFile(File file) throws IOException {
    RandomAccessFile accessFile = new RandomAccessFile(file, "r");
    byte[] bs = new byte[(int) accessFile.length()];
    accessFile.readFully(bs);//from  ww  w .ja v  a  2 s  .  c  o m
    accessFile.close();
    return new String(bs);
}

From source file:Main.java

private static String readInstallationFile(File installation) throws IOException {
    RandomAccessFile f = new RandomAccessFile(installation, "r");
    byte[] bytes = new byte[(int) f.length()];
    f.readFully(bytes);/*from  www .  j  av a 2s  . c o m*/
    f.close();
    return new String(bytes);
}

From source file:Main.java

public static long truncateFile(String fileName, long size) throws FileNotFoundException, IOException {
    RandomAccessFile raf = new RandomAccessFile(fileName, "rw");

    if (raf.length() >= size) {
        FileChannel channel = raf.getChannel();
        channel.truncate(size);/*  www  .  j  av a2 s  . co  m*/
        return size;
    }

    return raf.length();
}

From source file:Main.java

private static String readInstallationFile(File installation) throws IOException {
    RandomAccessFile accessFile = new RandomAccessFile(installation, "r");
    byte[] bs = new byte[(int) accessFile.length()];
    accessFile.readFully(bs);//from   w  ww  . ja v  a  2  s  .  c  om
    accessFile.close();
    return new String(bs);
}

From source file:Main.java

public static boolean appendFile(String filename, byte[] data, int datapos, int datalength) {
    try {//from  w  w w . j  av a 2 s.co  m

        createFile(filename);

        RandomAccessFile rf = new RandomAccessFile(filename, "rw");
        rf.seek(rf.length());
        rf.write(data, datapos, datalength);
        if (rf != null) {
            rf.close();
        }

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

    return true;
}

From source file:Main.java

public static short[] fromAudioFile(RandomAccessFile f) {
    short[] samples = null;

    try {/*from   w  w  w .j a v a2 s .  c  o  m*/
        samples = new short[(int) (f.length() / 2)];
        f.seek(0); //Seek to start point of file

        for (int i = 0; i < f.length() / 2; i++) {
            samples[i] = f.readShort();
        }
        f.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return samples;
}

From source file:org.apache.hadoop.hdfs.server.namenode.FSImageUtil.java

public static boolean checkFileFormat(RandomAccessFile file) throws IOException {
    if (file.length() < Loader.MINIMUM_FILE_LENGTH)
        return false;

    byte[] magic = new byte[MAGIC_HEADER.length];
    file.readFully(magic);//from w w  w . j av a2s  .co m
    if (!Arrays.equals(MAGIC_HEADER, magic))
        return false;

    return true;
}

From source file:Main.java

public static byte[] readFile(File file) throws IOException {
    // Open file/*  ww w  .  j  av a2  s. c o m*/
    RandomAccessFile f = new RandomAccessFile(file, "r");
    try {
        // Get and check length
        long longlength = f.length();
        int length = (int) longlength;
        if (length != longlength)
            throw new IOException("File size >= 2 GB");
        // Read file and return data
        byte[] data = new byte[length];
        f.readFully(data);
        return data;
    } finally {
        f.close();
    }
}

From source file:org.snt.inmemantlr.utils.FileUtils.java

/**
 * load file content//from  w w  w.ja  va 2s  .c om
 *
 * @param path path of the file to load
 * @return file content as string
 */
public static String loadFileContent(String path) {
    byte[] bytes;
    try {
        RandomAccessFile f = new RandomAccessFile(path, "r");
        bytes = new byte[(int) f.length()];
        f.read(bytes);
    } catch (Exception e) {
        return null;
    }
    return new String(bytes);
}