Example usage for java.io ObjectOutputStream ObjectOutputStream

Introduction

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

Prototype

public ObjectOutputStream(OutputStream out) throws IOException 

Source Link

Document

Creates an ObjectOutputStream that writes to the specified OutputStream.

Usage

From source file:Data.java

public static void main(String[] args) {
    Data data = new Data(1);
    try {//from  www .  ja  va 2s  .  c  om
        ObjectOutputStream objectOut = new ObjectOutputStream(
                new BufferedOutputStream(new FileOutputStream("C:/test.bin")));
        objectOut.writeObject(data);
        System.out.println("1st Object written has value: " + data.getValue());
        data.setValue(2);
        objectOut.writeObject(data);
        System.out.println("2nd Object written has value: " + data.getValue());
        data.setValue(3);
        objectOut.writeObject(data);
        System.out.println("3rd Object written has value: " + data.getValue());
        objectOut.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
    }
    try {
        ObjectInputStream objectIn = new ObjectInputStream(
                new BufferedInputStream(new FileInputStream("C:/test.bin")));
        Data data1 = (Data) objectIn.readObject();
        Data data2 = (Data) objectIn.readObject();
        Data data3 = (Data) objectIn.readObject();
        System.out.println(data1.equals(data2));
        System.out.println(data2.equals(data3));
        System.out.println(data1.getValue());
        System.out.println(data2.getValue());
        System.out.println(data3.getValue());
        objectIn.close();
    } catch (Exception e) {
        e.printStackTrace(System.err);
    }
}

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From source file:Person.java

public static void main(String[] args) {
    Person p1 = new Person("John", "Male", 1.7);
    Person p2 = new Person("Wally", "Male", 1.7);
    Person p3 = new Person("Katrina", "Female", 1.4);

    File fileObject = new File("person.ser");

    try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(fileObject))) {

        oos.writeObject(p1);/*  w  w w . j a  v  a2 s.c o m*/
        oos.writeObject(p2);
        oos.writeObject(p3);

        // Display the serialized objects on the standard output
        System.out.println(p1);
        System.out.println(p2);
        System.out.println(p3);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:MainClass.java

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

    KeyGenerator keyGen = KeyGenerator.getInstance("DES");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
    random.setSeed(101L);//w  w w . j  a va2  s  . c  om
    keyGen.init(56, random);
    SecretKey sKey = keyGen.generateKey();
    SecretKeyFactory kfactory = SecretKeyFactory.getInstance("DES");

    DESKeySpec kspec = (DESKeySpec) kfactory.getKeySpec(sKey, DESKeySpec.class);

    System.out.println(sKey);
    FileOutputStream fos = new FileOutputStream("secretKeys");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    oos.writeObject(kspec.getKey());

    FileInputStream fin = new FileInputStream("secretKeys");
    ObjectInputStream ois = new ObjectInputStream(fin);

    byte[] kMaterial = (byte[]) ois.readObject();

    DESKeySpec keyspec = new DESKeySpec(kMaterial);
    SecretKey newKey = kfactory.generateSecret(keyspec);
    System.out.println(newKey);
    System.out.println("Do the keys equal :" + newKey.equals(sKey));

}

---

From source file:MyClass.java

public static void main(String[] argv) throws Exception {
    double v[] = { 1.1, 2.2, 3.3 };
    double v2[] = { 9.0, 8.0, 7.7 };

    MyClass obj1 = new MyClass("This is a test", v, "Test.txt");
    MyClass obj2 = new MyClass("Alpha Beta Gamma", v2, "Sample.dat");

    ObjectOutputStream fout = new ObjectOutputStream(new FileOutputStream("obj.dat"));
    System.out.println("obj1:\n" + obj1);
    fout.writeObject(obj1);/* w w w .  j  a  v a 2  s.  c  om*/
    System.out.println("obj2:\n" + obj2);
    fout.writeObject(obj2);
    fout.close();

    ObjectInputStream fin = new ObjectInputStream(new FileInputStream("obj.dat"));
    MyClass inputObj;

    inputObj = (MyClass) fin.readObject();
    System.out.println("First object:\n" + inputObj);

    inputObj = (MyClass) fin.readObject();
    System.out.println("Second object:\n" + inputObj);
    fin.close();
}

---

From source file:CachedRS.java

public static void main(String[] args) throws Exception {
    FileInputStream fis = new FileInputStream(CRS_FILE_LOC);
    ObjectInputStream in = new ObjectInputStream(fis);
    CachedRowSet crs = (CachedRowSet) in.readObject();
    fis.close();/*from ww  w .  j  a v  a  2s . c  o  m*/
    in.close();

    Class.forName("oracle.jdbc.driver.OracleDriver");
    crs.setUrl("jdbc:oracle:thin:@localhost:1521:ORCL");
    crs.setUsername("yourName");
    crs.setPassword("mypwd");
    String sql = "SELECT SSN, Name, Salary, Hiredate FROM Employees WHERE SSN=?";
    crs.setCommand(sql);
    crs.setInt(1, 111111111);
    crs.execute();

    FileOutputStream fos = new FileOutputStream(CRS_FILE_LOC);
    ObjectOutputStream out = new ObjectOutputStream(fos);
    out.writeObject(crs);
    out.close();
    crs.close();

    fis = new FileInputStream(CRS_FILE_LOC);
    in = new ObjectInputStream(fis);
    crs = (CachedRowSet) in.readObject();
    fis.close();
    in.close();

    while (crs.next()) {
        System.out.print("SSN: " + crs.getInt("ssn"));
        System.out.print(", Name: " + crs.getString("name"));
        System.out.print(", Salary: $" + crs.getDouble("salary"));
        System.out.print(", HireDate: " + crs.getDate("hiredate"));
    }
    crs.close();
}

---

From source file:ID.java

public static void main(String[] args) throws IOException, ClassNotFoundException {
    ID id = new ID();
    List employees = new ArrayList();
    employees.add(new Employee("A", id));
    employees.add(new Employee("B", id));
    employees.add(new Employee("C", id));
    System.out.println("employees: " + employees);
    ByteArrayOutputStream buf1 = new ByteArrayOutputStream();
    ObjectOutputStream o1 = new ObjectOutputStream(buf1);
    o1.writeObject(employees);// w  ww  .j  a  v  a 2s  .co  m
    o1.writeObject(employees);

    ByteArrayOutputStream buf2 = new ByteArrayOutputStream();
    ObjectOutputStream o2 = new ObjectOutputStream(buf2);
    o2.writeObject(employees);

    ObjectInputStream in1 = new ObjectInputStream(new ByteArrayInputStream(buf1.toByteArray()));
    ObjectInputStream in2 = new ObjectInputStream(new ByteArrayInputStream(buf2.toByteArray()));
    List emp1 = (List) in1.readObject(), emp2 = (List) in1.readObject(), emp3 = (List) in2.readObject();
    System.out.println("emp1: " + emp1);
    System.out.println("emp2: " + emp2);
    System.out.println("emp3: " + emp3);
}

---

From source file:Engine.java

public static void main(String[] args) throws Exception {
    Car c1 = new Car("Some car", 4, new Engine(6));

    ObjectOutputStream oos = null;

    FileOutputStream fos = new FileOutputStream("car.ser");
    oos = new ObjectOutputStream(fos);

    oos.writeObject(c1);//w  w  w  . ja  va 2 s .  c  om
    ObjectInputStream ois = null;

    FileInputStream fis = new FileInputStream("car.ser");
    ois = new ObjectInputStream(fis);

    Car c2 = (Car) ois.readObject();

    System.out.println("Number of tires = " + c2.getNumTires());
    System.out.println("Number of cylinders = " + c2.getEngine().getNumCylinders());
    System.out.println("Name = " + c2.getName());
}

---

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    SSLSocketFactory factory = HttpsURLConnection.getDefaultSSLSocketFactory();
    SSLSocket socket = (SSLSocket) factory.createSocket("127.0.0.1", 9999);
    socket.startHandshake();/*from w  w w  . j  a  va 2  s. c o m*/
    SSLSession session = socket.getSession();
    java.security.cert.Certificate[] servercerts = session.getPeerCertificates();

    List mylist = new ArrayList();
    for (int i = 0; i < servercerts.length; i++) {
        mylist.add(servercerts[i]);
    }

    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    CertPath cp = cf.generateCertPath(mylist);

    FileOutputStream f = new FileOutputStream("CertPath.dat");
    ObjectOutputStream b = new ObjectOutputStream(f);
    b.writeObject(cp);

}

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From source file:Person.java

public static void main(String[] args) throws Exception {
    ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream("yourFile.dat"));

    Person person = new Person();
    person.setFirstName("A");
    person.setLastName("B");
    person.setAge(38);/*from  w  ww . j  a va2  s .co  m*/
    outputStream.writeObject(person);

    person = new Person();
    person.setFirstName("C");
    person.setLastName("D");
    person.setAge(22);

    outputStream.writeUnshared(person);

    outputStream.close();
}

---

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
    random.setSeed(101L);/*from   w w w  . j  a va2 s .c  om*/
    keyGen.initialize(1024, random);
    KeyPair keypair = keyGen.generateKeyPair();

    KeyFactory kfactory = KeyFactory.getInstance("DSA");

    DSAPublicKeySpec kspec = (DSAPublicKeySpec) kfactory.getKeySpec(keypair.getPublic(),
            DSAPublicKeySpec.class);

    System.out.println(keypair.getPublic());
    FileOutputStream fos = new FileOutputStream("publicKeys");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    oos.writeObject(kspec.getY());
    oos.writeObject(kspec.getP());
    oos.writeObject(kspec.getQ());
    oos.writeObject(kspec.getG());

    FileInputStream fin = new FileInputStream("publicKeys");
    ObjectInputStream ois = new ObjectInputStream(fin);

    BigInteger Y = (BigInteger) ois.readObject();
    BigInteger P = (BigInteger) ois.readObject();
    BigInteger Q = (BigInteger) ois.readObject();
    BigInteger G = (BigInteger) ois.readObject();

    DSAPublicKeySpec keyspec = new DSAPublicKeySpec(Y, P, Q, G);
    PublicKey pkey = kfactory.generatePublic(keyspec);
    System.out.println(pkey);
}

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