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 FileNotFoundException {

    Formatter formatter = new Formatter(new File("generated/format.txt"));

    // format a new string
    String name = "from java2s.com";
    formatter.format("Hello %s !", name);

    // print the formatted string
    System.out.println(formatter);

    // flush the formatter. Here it does nothing.
    formatter.flush();// w  w w. ja va  2 s .  c o m
    System.out.println("Formatter Flushed.");
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File f = new File("your.ttf");
    FileInputStream in = new FileInputStream(f);
    Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, in);
    Font dynamicFont32Pt = dynamicFont.deriveFont(32f);

    JLabel testLabel = new JLabel(dynamicFont.getName());
    testLabel.setFont(dynamicFont32Pt);/* www .  java  2 s .  c  o m*/
    JFrame frame = new JFrame("Font Loading Demo");
    frame.getContentPane().add(testLabel);
    frame.pack();
    frame.setVisible(true);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    File aFile = new File("charData.xml");
    FileInputStream inFile = null;

    inFile = new FileInputStream(aFile);

    FileChannel inChannel = inFile.getChannel();
    ByteBuffer buf = ByteBuffer.allocate(48);

    while (inChannel.read(buf) != -1) {
        System.out.println("String read: " + ((ByteBuffer) (buf.flip())).asCharBuffer().get(0));
        buf.clear();//from  w  w  w  . j  av a 2  s  . c o m
    }
    inFile.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();
    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 ww  w.  j  a v a  2 s.c  o  m*/

    MappedByteBuffer mbb = buf.load();

    channel.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("c:\\a.bat");
    InputStream is = new FileInputStream(file);

    long length = file.length();
    if (length > Integer.MAX_VALUE) {
        System.out.println("File is too large");
    }//from   w  w  w .  j a v  a 2  s .  c om

    byte[] bytes = new byte[(int) length];

    int offset = 0;
    int numRead = 0;
    while (numRead >= 0) {
        numRead = is.read(bytes, offset, bytes.length - offset);
        offset += numRead;
    }

    if (offset < bytes.length) {
        throw new IOException("Could not completely read file " + file.getName());
    }
    is.close();
    System.out.println(new String(bytes));
}

From source file:Main.java

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

    File f = new File("your.ttf");
    FileInputStream in = new FileInputStream(f);
    Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, in);
    Font dynamicFont32Pt = dynamicFont.deriveFont(32f);

    JLabel testLabel = new JLabel("Dynamically loaded font \"" + dynamicFont.getName() + "\"");
    testLabel.setFont(dynamicFont32Pt);/*from  w w  w .  j a  va  2  s . c  om*/
    JFrame frame = new JFrame("Font Loading Demo");
    frame.getContentPane().add(testLabel);
    frame.pack();
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    FileChannel rwChannel = new RandomAccessFile(new File("test.txt"), "rw").getChannel();
    ByteBuffer wrBuf = rwChannel.map(FileChannel.MapMode.READ_WRITE, 0, (int) rwChannel.size());
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File file = new File(args[0]);
    sun.awt.shell.ShellFolder sf = sun.awt.shell.ShellFolder.getShellFolder(file);
    Icon icon = new ImageIcon(sf.getIcon(true));
    System.out.println("type = " + sf.getFolderType());

    JLabel label = new JLabel(icon);
    JFrame frame = new JFrame();
    frame.getContentPane().add(label);//from www  . j  a  v  a2 s  .  c  o  m
    frame.pack();
    frame.setVisible(true);

}

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 w w  w  .ja  va  2 s . com
    chooser.setCurrentDirectory(null);
    chooser.showOpenDialog(null);
    FileFilter obj = chooser.getAcceptAllFileFilter();
}

From source file:FileAttributesDemo.java

public static void main(String[] args) throws IOException {
    // Create a new file, by default canWrite=true, readonly=false
    File file = new File("test.txt");
    if (file.exists()) {
        file.delete();//from w  w w  . ja  v a 2  s.  c o  m
    }
    file.createNewFile();
    System.out.println("Before. canWrite?" + file.canWrite());

    // set to read-only, atau canWrite = false */
    file.setWritable(false);
    System.out.println("After. canWrite?" + file.canWrite());
}