Example usage for java.io File File

Introduction

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

Prototype

public File(URI uri)

Source Link

Document

Creates a new File instance by converting the given file: URI into an abstract pathname.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    ZipFile zipFile = new ZipFile(new File("testfile.zip"), ZipFile.OPEN_DELETE);

    Enumeration zipEntries = zipFile.entries();

    while (zipEntries.hasMoreElements()) {
        System.out.println(((ZipEntry) zipEntries.nextElement()).getName());
    }/*from  ww  w .  j  a v a  2 s  .  c  o  m*/
}

From source file:Main.java

public static void main(String args[]) throws IOException {
    File file = new File("your_file.jpg");
    BufferedImage image = ImageIO.read(file);

    int x = 10;//ww w .jav  a2  s  .  co  m
    int y = 10;

    int clr = image.getRGB(x, y);
    int red = (clr & 0x00ff0000) >> 16;
    int green = (clr & 0x0000ff00) >> 8;
    int blue = clr & 0x000000ff;
    System.out.println("Red Color value = " + red);
    System.out.println("Green Color value = " + green);
    System.out.println("Blue Color value = " + blue);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

    FileLock lock = channel.lock();

    lock = channel.tryLock();/*  w  ww  .j  av  a 2 s.com*/

    lock.release();

    channel.close();
}

From source file:MainClass.java

public static void main(String[] args) {
    File originFile = new File("c:\\file1.txt");
    File destinationFile = new File("c:\\file1.txt");
    if (!originFile.exists() || destinationFile.exists()) {
        return;//from w w w. ja  v  a 2  s  . c  om
    }
    try {
        byte[] readData = new byte[1024];
        FileInputStream fis = new FileInputStream(originFile);
        FileOutputStream fos = new FileOutputStream(destinationFile);
        int i = fis.read(readData);

        while (i != -1) {
            fos.write(readData, 0, i);
            i = fis.read(readData);
        }
        fis.close();
        fos.close();
    } catch (IOException e) {
        System.out.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File aFile = new File("C:/test.bin");
    FileInputStream inFile = new FileInputStream(aFile);
    FileChannel inChannel = inFile.getChannel();
    final int PRIMECOUNT = 6;
    ByteBuffer buf = ByteBuffer.allocate(8 * PRIMECOUNT);
    long[] primes = new long[PRIMECOUNT];
    while (inChannel.read(buf) != -1) {
        ((ByteBuffer) (buf.flip())).asLongBuffer().get(primes);
        for (long prime : primes) {
            System.out.printf("%10d", prime);
        }//  w  w  w.  j av  a  2s  .c  o  m
        buf.clear();
    }
    inFile.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    JFileChooser chooser = new JFileChooser();
    File f = new File(new File(".").getCanonicalPath());
    chooser.setCurrentDirectory(f);//from  www  .ja  va  2 s. co m
    chooser.setCurrentDirectory(null);
    chooser.showOpenDialog(null);
    JComponent obj = chooser.getAccessory();

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();
    MappedByteBuffer buf = channel.map(FileChannel.MapMode.READ_WRITE, 0, (int) channel.size());

    buf.put(0, (byte) 0xFF);

    System.out.println(buf.isLoaded());

    buf.force();//from w  w w  .  j a  v a  2s  .  c o m

    channel.close();
}

From source file:Main.java

  public static void main(String[] argv) throws Exception {
  File file = new File("c:\\");

  URL url = file.toURI().toURL(); 
  URL[] urls = new URL[] { url };

  ClassLoader cl = new URLClassLoader(urls);

  Class cls = cl.loadClass("com.mycompany.MyClass");
}

From source file:CopyBytes.java

public static void main(String[] args) throws IOException {
    File inputFile = new File("input.txt");
    File outputFile = new File("output.txt");

    FileInputStream in = new FileInputStream(inputFile);
    FileOutputStream out = new FileOutputStream(outputFile);
    int c;/*from   ww  w .j  ava 2s  .c  o  m*/

    while ((c = in.read()) != -1)
        out.write(c);

    in.close();
    out.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

    FileLock lock = channel.lock(0, Long.MAX_VALUE, true);

    lock = channel.tryLock(0, Long.MAX_VALUE, true);

    boolean isShared = lock.isShared();

    lock.release();//from  ww  w  .j  a v  a  2  s .c  om

    channel.close();
}