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 {

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

    // write something in the file
    oout.writeUTF("Hello World from java2s.com");
    oout.flush();// w  w  w  . j a v a 2  s  . co  m
    oout.close();
    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    // check how many bytes are available
    System.out.println(ois.available());
    ois.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    short b = 32767;

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

    // write something in the file
    oout.writeShort(b);/*w ww.j a  va2 s  .co  m*/
    oout.flush();
    oout.close();
    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    // read and print the short
    System.out.println(ois.readUnsignedShort());
    ois.close();
}

From source file:Main.java

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

    double[] dbuf = { 65.56, 66.89, 67.98, 68.82, 69.55, 70.37 };

    FileOutputStream fos = new FileOutputStream("c:\\test.txt");

    DataOutputStream dos = new DataOutputStream(fos);

    for (double d : dbuf) {
        dos.writeDouble(d);//w  ww . j a v  a  2s.  c o m
    }

    dos.flush();

    InputStream is = new FileInputStream("c:\\test.txt");

    DataInputStream dis = new DataInputStream(is);

    while (dis.available() > 0) {
        double c = dis.readDouble();
        System.out.print(c + " ");
    }

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    User a = new User("A", "B");
    System.out.println("logon a = " + a);
    ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("User.out"));
    o.writeObject(a);/*from ww  w .  ja  va 2s.  c o m*/
    o.close();

    Thread.sleep(1000); // Delay for 1 second

    ObjectInputStream in = new ObjectInputStream(new FileInputStream("User.out"));
    System.out.println("Recovering object at " + new Date());
    a = (User) in.readObject();
    System.out.println("logon a = " + a);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    try {/*from  w w w  .  j a va  2  s.c  o  m*/
        String url = "jdbc:odbc:yourdatabasename";
        String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
        String user = "guest";
        String password = "guest";

        FileInputStream fis = new FileInputStream("sometextfile.txt");

        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        Statement createTable = connection.createStatement();
        createTable.executeUpdate("CREATE TABLE source_code (name char(20), source LONGTEXT)");
        String ins = "INSERT INTO source_code VALUES(?,?)";
        PreparedStatement statement = connection.prepareStatement(ins);

        statement.setString(1, "TryInputStream2");
        statement.setAsciiStream(2, fis, fis.available());

        int rowsUpdated = statement.executeUpdate();
        System.out.println("Rows affected: " + rowsUpdated);
        Statement getCode = connection.createStatement();
        ResultSet theCode = getCode.executeQuery("SELECT name,source FROM source_code");
        BufferedReader reader = null;
        String input = null;

        while (theCode.next()) {
            reader = new BufferedReader(new InputStreamReader(theCode.getAsciiStream(2)));
            while ((input = reader.readLine()) != null) {
                System.out.println(input);
            }
        }
        connection.close();
    } catch (Exception e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    try {/* w w w  . j  ava2s  .c  om*/
        String url = "jdbc:odbc:yourdatabasename";
        String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
        String user = "guest";
        String password = "guest";

        FileInputStream fis = new FileInputStream("sometextfile.txt");

        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        Statement createTable = connection.createStatement();
        createTable.executeUpdate("CREATE TABLE source_code (name char(20), source LONGTEXT)");
        String ins = "INSERT INTO source_code VALUES(?,?)";
        PreparedStatement statement = connection.prepareStatement(ins);

        statement.setString(1, "TryInputStream2");
        statement.setAsciiStream(2, fis, fis.available());

        int rowsUpdated = statement.executeUpdate();
        System.out.println("Rows affected: " + rowsUpdated);
        Statement getCode = connection.createStatement();
        ResultSet theCode = getCode.executeQuery("SELECT name,source FROM source_code");
        BufferedReader reader = null;
        String input = null;

        while (theCode.next()) {
            reader = new BufferedReader(new InputStreamReader(theCode.getAsciiStream("source")));
            while ((input = reader.readLine()) != null) {
                System.out.println(input);
            }
        }
        connection.close();
    } catch (Exception e) {
        System.err.println(e);
    }
}

From source file:MainClass.java

public static void main(String[] a) throws Exception {
    String elements[] = { "A", "B", "C", "D", "E" };
    Set set = new HashSet(Arrays.asList(elements));

    FileOutputStream fos = new FileOutputStream("set.ser");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject(set);//  w  ww .  j ava 2  s . co  m
    oos.close();

    FileInputStream fis = new FileInputStream("set.ser");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Set anotherSet = (Set) ois.readObject();
    ois.close();
    System.out.println(anotherSet);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream("clients.ser"));

    AccountRecordSerializable record;/*from  ww  w  .j ava 2  s .co m*/

    record = new AccountRecordSerializable(1, "firstName", "lastName", 0.1);
    output.writeObject(record);

    ObjectInputStream input = new ObjectInputStream(new FileInputStream("clients.ser"));
    record = (AccountRecordSerializable) input.readObject();

    System.out.printf("%-10d%-12s%-12s%10.2f\n", record.getAccount(), record.getFirstName(),
            record.getLastName(), record.getBalance());

    output.close();
}

From source file:Main.java

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

    float[] fbuf = { 123.345f, 234.567f, 123.123f, 123.123f, 123.123f, 123.345f };

    FileOutputStream fos = new FileOutputStream("c:\\test.txt");
    DataOutputStream dos = new DataOutputStream(fos);

    for (float f : fbuf) {
        dos.writeFloat(f);//  w  w  w  .  j av a 2s .  c o m
    }

    dos.flush();

    InputStream is = new FileInputStream("c:\\test.txt");

    DataInputStream dis = new DataInputStream(is);

    while (dis.available() > 0) {
        float c = dis.readFloat();
        System.out.print(c + " ");
    }
}

From source file:InputOutputDemoBinaryFile.java

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

    //Write primitive values to a binary file "java2s.dat":
    DataOutputStream dos = new DataOutputStream(new FileOutputStream("java2s.dat"));
    dos.writeInt(228);/* www.  j  a v a 2  s.  c om*/
    dos.writeChar(' ');
    dos.writeUTF("Java Source and Support at www.java2s.com");
    dos.close();
    //Read primitive values from binary file "java2s.dat":
    DataInputStream dis = new DataInputStream(new FileInputStream("java2s.dat"));
    System.out.println(dis.readInt() + "|" + dis.readChar() + "|" + dis.readUTF());
}