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:MainClass.java

public static void main(String[] args) {
    try {//from  ww  w  . j  a va 2 s  .  co m
        char[] chars = new char[2];
        chars[0] = '\u4F60';
        chars[1] = '\u597D';
        String encoding = "GB18030";
        File textFile = new File("C:\\temp\\myFile.txt");
        PrintWriter writer = new PrintWriter(textFile,

                encoding);
        writer.write(chars);
        writer.close();

        // read back
        InputStreamReader reader = new InputStreamReader(new FileInputStream(textFile), encoding);
        char[] chars2 = new char[2];
        reader.read(chars2);
        System.out.print(chars2[0]);
        System.out.print(chars2[1]);
        reader.close();
    } catch (IOException e) {
        System.out.println(e.toString());
    }
}

From source file:MainClass.java

public static void main(String args[]) {
    File f1 = new File("MainClass.java");
    System.out.println("File Name:" + f1.getName());
    System.out.println("Path:" + f1.getPath());
    System.out.println("Abs Path:" + f1.getAbsolutePath());
    System.out.println("Parent:" + f1.getParent());
    System.out.println(f1.exists() ? "exists" : "does not exist");
    System.out.println(f1.canWrite() ? "is writeable" : "is not writeable");
    System.out.println(f1.canRead() ? "is readable" : "is not readable");
    System.out.println("is a directory" + f1.isDirectory());
    System.out.println(f1.isFile() ? "is normal file" : "might be a named pipe");
    System.out.println(f1.isAbsolute() ? "is absolute" : "is not absolute");
    System.out.println("File last modified:" + f1.lastModified());
    System.out.println("File size:" + f1.length() + " Bytes");
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));

    int eventTypeID = reader.nextTag();
    reader.require(XMLStreamConstants.START_ELEMENT, null, "person");

    eventTypeID = reader.nextTag();//  w  w w.  j av  a 2  s  . c o  m
    reader.require(XMLStreamConstants.START_ELEMENT, null, "first_name");
    System.out.println(reader.getElementText());

}

From source file:MainClass.java

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

    try {/*from  w ww.j a  va2s .  c o m*/
        inFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
        System.exit(1);
    }

    FileChannel inChannel = inFile.getChannel();
    final int COUNT = 6;
    ByteBuffer buf = ByteBuffer.allocate(8 * COUNT);
    long[] data = new long[COUNT];
    try {
        int pos = 0;
        while (inChannel.read(buf) != -1) {
            try {
                ((ByteBuffer) (buf.flip())).asLongBuffer().get(data);
                pos = data.length;
            } catch (BufferUnderflowException e) {
                LongBuffer longBuf = buf.asLongBuffer();
                pos = longBuf.remaining();
                longBuf.get(data, 0, pos);
            }
            System.out.println();
            for (int i = 0; i < pos; i++) {
                System.out.printf("%10d", data[i]);
            }
            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 args[]) throws Exception {
    FileInputStream fileInputStream = new FileInputStream(new File("src/file.xml"));
    DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = builderFactory.newDocumentBuilder();
    Document doc1 = builder.parse(fileInputStream);
    doc1.getDocumentElement().normalize();
    NodeList kList1 = doc1.getElementsByTagName("item");

    StringBuilder stringBuilder = new StringBuilder();

    for (int temp = 0; temp < kList1.getLength(); temp++) {
        Node kNode1 = kList1.item(temp);
        System.out.println("\nCurrent Element :" + kNode1.getNodeName());
        if (kNode1.getNodeType() == Node.ELEMENT_NODE) {
            Element eElement = (Element) kNode1;
            System.out.println("node name" + eElement.getNodeName());
            Node in = eElement.getFirstChild();
            if ((in.getTextContent() != null) && !(in.getTextContent()).isEmpty()
                    && !(in.getTextContent().length() == 0))
                stringBuilder.append(in.getTextContent());
        }/*from w  w  w. ja v a2 s .co  m*/
    }
    System.out.println(stringBuilder);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setValidating(true);/*from ww w . j a va2s .  c o  m*/
    factory.setExpandEntityReferences(false);
    Document doc = factory.newDocumentBuilder().parse(new File("filename"));
    Element element = doc.getElementById("key1");

    String attrValue = element.getAttribute("value");
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();

    Document originalDocument = db.parse(new File("input.xml"));
    Node originalRoot = originalDocument.getDocumentElement();

    Document copiedDocument = db.newDocument();
    Node copiedRoot = copiedDocument.importNode(originalRoot, true);
    copiedDocument.appendChild(copiedRoot);

}

From source file:Main.java

static public void main(String args[]) throws Exception {
    File infile = new File("inFilename");
    File outfile = new File("outFilename");

    RandomAccessFile inraf = new RandomAccessFile(infile, "r");
    RandomAccessFile outraf = new RandomAccessFile(outfile, "rw");

    FileChannel finc = inraf.getChannel();
    FileChannel foutc = outraf.getChannel();

    MappedByteBuffer inmbb = finc.map(FileChannel.MapMode.READ_ONLY, 0, (int) infile.length());

    Charset inCharset = Charset.forName("UTF8");
    Charset outCharset = Charset.forName("UTF16");

    CharsetDecoder inDecoder = inCharset.newDecoder();
    CharsetEncoder outEncoder = outCharset.newEncoder();

    CharBuffer cb = inDecoder.decode(inmbb);
    ByteBuffer outbb = outEncoder.encode(cb);

    foutc.write(outbb);//from  ww w.jav a2 s .c om

    inraf.close();
    outraf.close();
}

From source file:ReadBinaryFile.java

public static void main(String[] args) throws Exception {
    NumberFormat cf = NumberFormat.getCurrencyInstance();

    File file = new File("product.dat");
    DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));

    boolean eof = false;
    while (!eof) {
        Product movie = readMovie(in);/*from   w  ww . j a  v a2  s  .  c  o m*/
        if (movie == null)
            eof = true;
        else {
            String msg = Integer.toString(movie.year);
            msg += ": " + movie.title;
            msg += " (" + cf.format(movie.price) + ")";
            System.out.println(msg);
        }
    }
    in.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    AudioInputStream stream = AudioSystem.getAudioInputStream(new File("audiofile"));
    //    stream = AudioSystem.getAudioInputStream(new URL(
    //      "http://hostname/audiofile"));

    AudioFormat format = stream.getFormat();
    if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
        format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, format.getSampleRate(),
                format.getSampleSizeInBits() * 2, format.getChannels(), format.getFrameSize() * 2,
                format.getFrameRate(), true); // big endian
        stream = AudioSystem.getAudioInputStream(format, stream);
    }/*from w w w  .  ja  v  a 2  s  .  co m*/

    SourceDataLine.Info info = new DataLine.Info(SourceDataLine.class, stream.getFormat(),
            ((int) stream.getFrameLength() * format.getFrameSize()));
    SourceDataLine line = (SourceDataLine) AudioSystem.getLine(info);
    line.open(stream.getFormat());
    line.start();

    int numRead = 0;
    byte[] buf = new byte[line.getBufferSize()];
    while ((numRead = stream.read(buf, 0, buf.length)) >= 0) {
        int offset = 0;
        while (offset < numRead) {
            offset += line.write(buf, offset, numRead - offset);
        }
    }
    line.drain();
    line.stop();
}