Example usage for java.io File File

List of usage examples for java.io File File

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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, UnsupportedEncodingException {

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

    // 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();/*from   w  w w  .j a  v  a2s .  co m*/
    System.out.println("Formatter Flushed.");
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File archivo = new File("c:/Java_Dev/run.bat");
    FileReader fr = new FileReader(archivo);
    BufferedReader br = new BufferedReader(fr);

    Vector<String> lines = new Vector<String>();

    String line;/*w  w w . j ava  2  s  .c o  m*/
    while ((line = br.readLine()) != null) {
        lines.add(line);
    }
    JOptionPane.showMessageDialog(null, new JScrollPane(new JList(lines)));
    fr.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String phrase = new String("www.java2s.com\n");

    File aFile = new File("test.txt");
    FileOutputStream outputFile = null;
    outputFile = new FileOutputStream(aFile, true);
    System.out.println("File stream created successfully.");

    FileChannel outChannel = outputFile.getChannel();

    ByteBuffer buf = ByteBuffer.allocate(1024);
    System.out.println("New buffer:           position = " + buf.position() + "\tLimit = " + buf.limit()
            + "\tcapacity = " + buf.capacity());
    // Load the data into the buffer
    for (char ch : phrase.toCharArray()) {
        buf.putChar(ch);//  w ww. j a va 2  s .c om
    }
    System.out.println("Buffer after loading: position = " + buf.position() + "\tLimit = " + buf.limit()
            + "\tcapacity = " + buf.capacity());
    buf.flip();
    System.out.println("Buffer after flip:    position = " + buf.position() + "\tLimit = " + buf.limit()
            + "\tcapacity = " + buf.capacity());

    outChannel.write(buf);
    outputFile.close();
    System.out.println("Buffer contents written to file.");
}

From source file:Main.java

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

    byte b = 66;/*from   w ww . jav a2s .c  om*/
    int i = 0;
    FileOutputStream fos = new FileOutputStream(new File("C://test1.txt"), true);

    fos.write(b);

    fos.flush();

    FileInputStream fis = new FileInputStream("C://test.txt");

    // read till the end of the file
    while ((i = fis.read()) != -1) {
        // convert integer to character
        char c = (char) i;

        System.out.print(c);
    }
    fos.close();
    fis.close();
}

From source file:Main.java

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

    byte b = 66;/*from w w w. j a  v  a 2 s . co m*/
    int i = 0;
    FileOutputStream fos = new FileOutputStream(new File("C://test1.txt"));

    fos.write(b);

    fos.flush();

    FileInputStream fis = new FileInputStream("C://test.txt");

    // read till the end of the file
    while ((i = fis.read()) != -1) {
        // convert integer to character
        char c = (char) i;

        System.out.print(c);
    }
    fos.close();
    fis.close();
}

From source file:MainClass.java

public static void main(String[] args) {
    File aFile = new File("file.dat");
    FileInputStream inFile = null;

    try {//from w w w.j  ava2  s.com
        inFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
        System.exit(0);
    }
    FileChannel inChannel = inFile.getChannel();
    final int COUNT = 6;
    ByteBuffer buf = ByteBuffer.allocate(8 * COUNT);
    long[] data = new long[COUNT];
    try {
        while (inChannel.read(buf) != -1) {
            ((ByteBuffer) (buf.flip())).asLongBuffer().get(data);
            System.out.println();
            for (long prime : data)
                System.out.printf("%10d", prime);
            buf.clear();
        }
        System.out.println("\nEOF reached.");
        inFile.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
        System.exit(1);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    JFileChooser chooser = new JFileChooser();
    File file = new File("filename.txt");
    Icon icon = chooser.getIcon(file);

    JLabel label = new JLabel("" + file);
    label.setIcon(icon);//w w w .  jav  a2s.  c  o m
    JFrame frame = new JFrame();
    frame.getContentPane().add(label, BorderLayout.CENTER);
    frame.pack();
    frame.setVisible(true);
}

From source file:MainClass.java

public static void main(String[] args) {
    File aFile = new File("primes.txt");
    FileInputStream inFile = null;
    try {/*from   ww w  . ja va2  s  . c  o m*/
        inFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
    }
    FileChannel inChannel = inFile.getChannel();
    try {
        ByteBuffer lengthBuf = ByteBuffer.allocate(8);
        while (true) {
            if (inChannel.read(lengthBuf) == -1) {
                break;
            }
            lengthBuf.flip();
            int strLength = (int) lengthBuf.getDouble();
            ByteBuffer buf = ByteBuffer.allocate(2 * strLength + 8);
            if (inChannel.read(buf) == -1) {
                break;
            }
            buf.flip();
            byte[] strChars = new byte[2 * strLength];
            buf.get(strChars);
            System.out.println(strLength);
            System.out.println(ByteBuffer.wrap(strChars).asCharBuffer());
            System.out.println(buf.getLong());
            lengthBuf.clear();
        }
        inFile.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
    }
}

From source file:Main.java

public static void main(String[] a) {
    try {/*from  w w  w  .  j  a  va  2  s.co m*/
        Desktop desktop = null;
        if (Desktop.isDesktopSupported()) {
            desktop = Desktop.getDesktop();
        }

        desktop.edit(new File("c:\\a.txt"));
    } catch (IOException ioe) {
        ioe.printStackTrace();
    }

}

From source file:Test.java

public static void main(String[] a) {
    try {// w  ww .  j a  va2  s .c om
        Desktop desktop = null;
        if (Desktop.isDesktopSupported()) {
            desktop = Desktop.getDesktop();
        }

        desktop.open(new File("c:\\a.doc"));
    } catch (IOException ioe) {
        ioe.printStackTrace();
    }

}