Example usage for java.io FileInputStream FileInputStream

List of usage examples for java.io FileInputStream FileInputStream

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Introduction

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

Prototype

public FileInputStream(FileDescriptor fdObj)

Source Link

Document

Creates a FileInputStream by using the file descriptor fdObj, which represents an existing connection to an actual file in the file system.

Usage

From source file:Main.java

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

    String s = "Hello World from java2s.com";
    byte[] b = { 'e', 'x', 'a', 'm', 'p', 'l', 'e' };

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    // write something in the file
    oout.writeObject(s);/*from   www .  j  a  v  a 2 s .c  o m*/
    oout.writeObject(b);
    oout.flush();
    oout.close();
    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    // read and print an object and cast it as string
    System.out.println((String) ois.readObject());

    // read and print an object and cast it as string
    byte[] read = (byte[]) ois.readObject();
    String s2 = new String(read);
    System.out.println(s2);
    ois.close();
}

From source file:PrintFile.java

public static void main(String args[]) throws Exception {
    if (args.length != 2) {
        System.err.println("usage : java PrintFile port file");
        System.err.println("sample: java PrintFile LPT1 sample.prn");
        System.exit(-1);/*from   w  w w  .  j  a v  a 2  s  . com*/
    }

    String portname = args[0];
    String filename = args[1];

    // Get port
    CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier(portname);

    // Open port
    // Requires owner name and timeout
    CommPort port = portId.open("Java Printing", 30000);

    // Setup reading from file
    FileInputStream fis = new FileInputStream(filename);
    BufferedInputStream bis = new BufferedInputStream(fis);

    // Setup output
    OutputStream os = port.getOutputStream();
    BufferedOutputStream bos = new BufferedOutputStream(os);

    int c;
    while ((c = bis.read()) != -1) {
        bos.write(c);
    }

    // Close
    bos.close();
    bis.close();
    port.close();
}

From source file:Main.java

public static void main(String[] args) {
    boolean areFilesIdentical = true;
    File file1 = new File("c:\\file1.txt");
    File file2 = new File("c:\\file2.txt");

    if (!file1.exists() || !file2.exists()) {
        System.out.println("One or both files do not exist");
        System.out.println(false);
    }// w  ww .  ja  v  a 2 s.  co  m

    System.out.println("length:" + file1.length());
    if (file1.length() != file2.length()) {
        System.out.println("lengths not equal");
        System.out.println(false);
    }

    try {
        FileInputStream fis1 = new FileInputStream(file1);
        FileInputStream fis2 = new FileInputStream(file2);
        int i1 = fis1.read();
        int i2 = fis2.read();
        while (i1 != -1) {
            if (i1 != i2) {
                areFilesIdentical = false;
                break;
            }
            i1 = fis1.read();
            i2 = fis2.read();
        }
        fis1.close();
        fis2.close();
    } catch (IOException e) {
        System.out.println("IO exception");
        areFilesIdentical = false;
    }
    System.out.println(areFilesIdentical);
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    ZipOutputStream fout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(args[0])));

    for (int n = 1; n < args.length; n++) {

        BufferedInputStream fin = new BufferedInputStream(new FileInputStream(args[n]));
        ZipEntry ze = new ZipEntry(rmPath(args[n]));

        fout.putNextEntry(ze);//  w  ww  .j  ava2 s . c  o m

        int i;
        do {
            i = fin.read();
            if (i != -1)
                fout.write(i);
        } while (i != -1);

        fout.closeEntry();
        fin.close();

        System.out.println("Compressing " + args[n]);
        System.out.println(
                " Original Size: " + ze.getSize() + " Compressed Size: " + ze.getCompressedSize() + "\n");
    }
    fout.close();
}

From source file:Main.java

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

    String s = "Hello World from java2s.com";

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    // write something in the file
    oout.writeUTF(s);//from   ww w. j  av a  2 s.c om
    oout.flush();

    // create an ObjectInputStream for the file we created before
    Main ois = new Main(new FileInputStream("test.txt"));

    // enable object resolving
    ois.enableResolveObject(true);

    // get the class for string and print the name
    System.out.println(ois.resolveObject(ois.readUTF()));
    ois.close();
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    String elements[] = { "I", "P", "E", "G", "P" };
    Set set = new HashSet(Arrays.asList(elements));
    Set set2 = ((Set) ((HashSet) set).clone());
    System.out.println(set2);//from  w ww .  j av  a 2  s.  co  m
    FileOutputStream fos = new FileOutputStream("set.ser");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject(set);
    oos.close();
    FileInputStream fis = new FileInputStream("set.ser");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Set set3 = (Set) ois.readObject();
    ois.close();
    System.out.println(set3);
}

From source file:NewMain.java

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

    FileInputStream myStream = new FileInputStream("D:\\logout.png");

    byte[] imageInBytes = IOUtils.toByteArray(myStream);

    System.out.println(imageInBytes);

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File source = new File(args[0]);
    File target = new File(source + ".new");

    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLOutputFactory outputFactory = XMLOutputFactory.newInstance();
    InputStream in = new FileInputStream(source);
    XMLEventReader reader = inputFactory.createXMLEventReader(in);

    OutputStream out = new FileOutputStream(target);
    XMLEventWriter writer = outputFactory.createXMLEventWriter(out);
    XMLEvent event;/*  w  w  w. j  a  va2 s  .  c  o  m*/

    boolean deleteSection = false;
    while (reader.hasNext()) {
        event = reader.nextEvent();
        if (event.getEventType() == XMLStreamConstants.START_ELEMENT
                && event.asStartElement().getName().toString().equalsIgnoreCase("companies")) {
            deleteSection = true;
            continue;
        } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                && (event.asEndElement().getName().toString().equalsIgnoreCase("companies"))) {
            deleteSection = false;
            continue;
        } else if (deleteSection) {
            continue;
        } else {
            writer.add(event);
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder documentBuilder = docBuilderFactory.newDocumentBuilder();
    Document node = documentBuilder.parse(new FileInputStream("data.xml"));
    cleanEmptyTextNodes(node);/*  w  w  w  .j a va2  s .c  om*/
    StreamResult result = new StreamResult(new StringWriter());

    Transformer transformer = TransformerFactory.newInstance().newTransformer();

    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", Integer.toString(4));

    transformer.transform(new DOMSource(node), result);
    System.out.println(result.getWriter().toString());
}

From source file:MainClass.java

public static void main(String[] args) throws IOException, ClassNotFoundException {
    System.out.println("Constructing objects:");
    MyBean myBean = new MyBean("A String ", 47);
    System.out.println(myBean);/*w ww  . j  a v a 2 s.  c o  m*/
    ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("MyBean.out"));
    System.out.println("Saving object:");
    o.writeObject(myBean);
    o.close();

    ObjectInputStream in = new ObjectInputStream(new FileInputStream("MyBean.out"));
    System.out.println("Recovering:");
    myBean = (MyBean) in.readObject();
    System.out.println(myBean);
}