JAVA EE: September 2016

Java Tutorial : Java IO (Java ObjectOutputStream | Java Serialization)

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Java Tutorial : Java IO (Java ObjectOutputStream | Java Serialization)

Employee.java

import java.io.Serializable;

/*
 * Before you can serialize and de-serialize objects the
 * class of the object must implement java.io.Serializable.
 */
public class Employee implements Serializable
{

    private static final long serialVersionUID = 3558283530338723147L;
    private String name;
    private int id;

    public Employee(String name, int id)
    {
        super();
        this.name = name;
        this.id = id;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public int getId()
    {
        return id;
    }

    public void setId(int id)
    {
        this.id = id;
    }

    @Override
    public String toString()
    {
        return "Employee [name=" + name + ", id=" + id + "]";
    }

}

ObjectOutputStreamDemo.java

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class ObjectOutputStreamDemo
{

    public static void main(String[] args) throws FileNotFoundException,
            IOException, ClassNotFoundException
    {
        ObjectOutputStreamDemo objectOutputStreamDemo = new ObjectOutputStreamDemo();
        objectOutputStreamDemo.writeEmployeeObject();
    }

    private void writeEmployeeObject() throws FileNotFoundException,
            IOException
    {
        FileOutputStream fileOutputStream = null;
        ObjectOutputStream objectOutputStream = null;
        try
        {
            fileOutputStream = new FileOutputStream("employee.txt");
            objectOutputStream = new ObjectOutputStream(fileOutputStream);

            Employee employee = new Employee("Peter",20);
            System.out.println(employee);

            /*
             * Write the specified object to the
             * ObjectOutputStream.
             */
            objectOutputStream.writeObject(employee);
            System.out
                    .println("Successfully written employee object to the file.\n");
        }
        finally
        {

            if (objectOutputStream != null)
            {
                /*
                 * Closing a ObjectOutputStream will also
                 * close the OutputStream instance to which
                 * the ObjectOutputStream is writing.
                 */
                objectOutputStream.close();
            }
        }

    }

}

Output

Employee [name=Peter, id=20]
Successfully written employee object to the file.

employee.txt

ObjectInputStreamDemo.java

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;

public class ObjectInputStreamDemo
{

    public static void main(String[] args) throws FileNotFoundException,
            IOException, ClassNotFoundException
    {
        ObjectInputStreamDemo objectInputStreamDemo = new ObjectInputStreamDemo();
        objectInputStreamDemo.readEmployeeObject();
    }

    private void readEmployeeObject() throws IOException,
            FileNotFoundException, ClassNotFoundException
    {
        FileInputStream fileInputStream = null;
        ObjectInputStream objectInputStream = null;

        try
        {
            fileInputStream = new FileInputStream("employee.txt");
            objectInputStream = new ObjectInputStream(fileInputStream);

            /*
             * Read an object from the ObjectInputStream.
             */
            Employee employee = (Employee) objectInputStream.readObject();

            System.out
                    .println("Successfully read employee object from the file.");
            System.out.println(employee);
            System.out.println("Name = " + employee.getName());
            System.out.println("Id = " + employee.getId());
        }
        finally
        {

            if (objectInputStream != null)
            {
                /*
                 * Closing a ObjectInputStream will also
                 * close the InputStream instance from which
                 * the ObjectInputStream is reading.
                 */
                objectInputStream.close();
            }
        }

    }

}

Output

Successfully read employee object from the file.
Employee [name=Peter, id=20]
Name = Peter
Id = 20


Refer: 

https://docs.oracle.com/javase/8/docs/api/index.html?java/io/ObjectOutputStream.html

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_ObjectOutputStream_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_ObjectOutputStream_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/77a722c38e027b0dc283350527400c69b6e8d643/BasicJava/JavaIODemo_ObjectOutputStream_App/?at=master

See also:

Java Tutorial : Java IO (Java Serializable Interface)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=N44f0ePhMbo&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java Serializable Interface)

Employee.java

import java.io.Serializable;

public class Employee implements Serializable
{
    private static final long serialVersionUID = 3558283530338723147L;
    private int id;
    private String name;

    public int getId()
    {
        return id;
    }

    public void setId(int id)
    {
        this.id = id;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

}

Refer:
https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_Serializable_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_Serializable_App/JavaIODemo

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/77a722c38e027b0dc283350527400c69b6e8d643/BasicJava/JavaIODemo_Serializable_App/JavaIODemo/?at=master

See also:

Friday, 23 September 2016

Java Tutorial : Java IO (Java Serialization_V5)

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https://www.youtube.com/watch?v=gMLRxweHfFA&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java Serialization_V5)

See also:

Java Tutorial : Java IO (Java Serialization_V4)

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https://www.youtube.com/watch?v=HhzX0CWq2zU&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java Serialization_V4)

See also:

Java Tutorial : Java IO (Java Serialization_V3)

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https://www.youtube.com/watch?v=yE7a6Gi7x4Q&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java Serialization_V3)

See also:

Java Tutorial : Java IO (Java Serialization_V2)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=FlPbBN8VPeY&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java Serialization_V2)

See also:

Java Tutorial : Java IO (Java Serialization_V1)

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https://www.youtube.com/watch?v=6RhAJWsKYCc&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java Serialization_V1)

See also:

Thursday, 22 September 2016

Java Tutorial : Java IO (Serialization and deserialization)- Playlist

Click here to watch in Youtube :
https://www.youtube.com/watch?v=SnUv-qt4Qh8&list=PLmCsXDGbJHdhpkYMYDf9CUL1Hnko5p0di
See also:

Java Tutorial : Java IO (Marker Interface)

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https://www.youtube.com/watch?v=SnUv-qt4Qh8&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Marker Interface)

Refer:
https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html

https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html

See also:

Java Tutorial : Java IO (DataStreams)

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https://www.youtube.com/watch?v=JSqPc2cOV5Q&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (DataStreams)

See also:

Java Tutorial : Java IO (DataOutputStream DataInputStream Example)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=OeL1GLYw8-M&list=UUhwKlOVR041tngjerWxVccw

DataOutputStreamDemo.java

import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class DataOutputStreamDemo
{

    public static void main(String[] args) throws Exception
    {
        DataOutputStreamDemo dataOutputStreamDemo = new DataOutputStreamDemo();
        dataOutputStreamDemo.writePrimitiveData();
    }

    public void writePrimitiveData() throws IOException
    {
        DataOutputStream dataOutputStream = null;
        FileOutputStream fileOutputStream = null;
        try
        {
            fileOutputStream = new FileOutputStream("data.txt");
            dataOutputStream = new DataOutputStream(fileOutputStream);
            int[] intArray = { 100, 250, 440, 550, 900 };

            for (int j : intArray)
            {
                dataOutputStream.writeInt(j);
            }

            System.out.println("Successfully written to \'data.txt\' file\n");
        }
        finally
        {
            if (dataOutputStream != null)
            {
                /*
                 * Closing a DataOutputStream will also
                 * close the OutputStream instance to which
                 * the DataOutputStream is writing.
                 */
                dataOutputStream.close();
            }
        }

    }
}

Output

Successfully written to 'data.txt' file

data.txt

DataInputStreamDemo.java

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;

public class DataInputStreamDemo
{

    public static void main(String[] args) throws Exception
    {
        DataInputStreamDemo dataInputStreamDemo = new DataInputStreamDemo();
        dataInputStreamDemo.readPrimitiveData();
    }

    public void readPrimitiveData() throws IOException
    {
        FileInputStream fileInputStream = null;
        DataInputStream dataInputStream = null;

        try
        {
            fileInputStream = new FileInputStream("data.txt");
            dataInputStream = new DataInputStream(fileInputStream);

            while (dataInputStream.available() > 0)
            {
                int intValue = dataInputStream.readInt();
                System.out.println(intValue);
            }

        }
        finally
        {
            if (dataInputStream != null)
            {
                /*
                 * Closing a DataInputStream will also close
                 * the InputStream instance from which the
                 * DataInputStream is reading.
                 */
                dataInputStream.close();
            }
        }

    }

}

Output

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_DataInput_and_Output_Stream_Example_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_DataInput_and_Output_Stream_Example_App

Bitbucket Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_DataInput_and_Output_Stream_Example_App

See also:

Java Tutorial : Java IO (DataInputStream and DataOutputStream)-Playlist

Click here to watch in Youtube :
https://www.youtube.com/watch?v=zuzXHqA00BM&list=PLmCsXDGbJHdhy_HxIpUqpfpOMl6CEBYff

See also:

Refer:
https://docs.oracle.com/javase/8/docs/api/index.html?java/io/DataOutputStream.html

Java Tutorial : Java IO (DataOutputStream)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=INIpdcB6o0k&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge

Java Tutorial : Java IO (DataOutputStream)

DataOutputStreamDemo.java

import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class DataOutputStreamDemo
{

    public static void main(String[] args) throws Exception
    {
        DataOutputStreamDemo dataOutputStreamDemo = new DataOutputStreamDemo();
        dataOutputStreamDemo.writePrimitiveData();
    }

    public void writePrimitiveData() throws IOException
    {
        DataOutputStream dataOutputStream = null;
        FileOutputStream fileOutputStream = null;
        try
        {
            fileOutputStream = new FileOutputStream("data.bin");
            dataOutputStream = new DataOutputStream(fileOutputStream);

            dataOutputStream.writeInt(125);
            dataOutputStream.writeFloat(150.45F);
            dataOutputStream.writeLong(9090);
            dataOutputStream.writeBoolean(true);

            System.out.println("Successfully written primitive data's to \'data.bin\' file\n");
        }
        finally
        {
            if (dataOutputStream != null)
            {
                /*
                 * Closing a DataOutputStream will also
                 * close the OutputStream instance to which
                 * the DataOutputStream is writing.
                 */
                dataOutputStream.close();
            }
        }

    }
}

Output

Successfully written primitive data's to 'data.bin' file

data.bin

DataInputStreamDemo.java

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;

public class DataInputStreamDemo
{

    public static void main(String[] args) throws Exception
    {
        DataInputStreamDemo dataInputStreamDemo = new DataInputStreamDemo();
        dataInputStreamDemo.readPrimitiveData();
    }

    public void readPrimitiveData() throws IOException
    {
        FileInputStream fileInputStream = null;
        DataInputStream dataInputStream = null;

        try
        {
            fileInputStream = new FileInputStream("data.bin");
            dataInputStream = new DataInputStream(fileInputStream);

            int intValue = dataInputStream.readInt();
            float floatValue = dataInputStream.readFloat();
            long longValue = dataInputStream.readLong();
            boolean booleanValue = dataInputStream.readBoolean();

            System.out.println("intValue     = " + intValue);
            System.out.println("floatValue   = " + floatValue);
            System.out.println("longValue    = " + longValue);
            System.out.println("booleanValue = " + booleanValue);
        }
        finally
        {
            if (dataInputStream != null)
            {
                /*
                 * Closing a DataInputStream will also close
                 * the InputStream instance from which the
                 * DataInputStream is reading.
                 */
                dataInputStream.close();
            }
        }

    }

}
Output
intValue     = 125
floatValue   = 150.45
longValue    = 9090
booleanValue = true

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_DataInputStream_DataOutputStream_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_DataInputStream_DataOutputStream_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/8270b2c7cbb37f975ee9fc66e47a041db3aa4063/BasicJava/JavaIODemo_DataInputStream_DataOutputStream_App/?at=master

See also:

Refer:
https://docs.oracle.com/javase/8/docs/api/index.html?java/io/DataInputStream.html

Java Tutorial : Java IO (DataInputStream)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=zuzXHqA00BM&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge

Java Tutorial : Java IO (DataInputStream)

DataOutputStreamDemo.java

import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class DataOutputStreamDemo
{

    public static void main(String[] args) throws Exception
    {
        DataOutputStreamDemo dataOutputStreamDemo = new DataOutputStreamDemo();
        dataOutputStreamDemo.writePrimitiveData();
    }

    public void writePrimitiveData() throws IOException
    {
        DataOutputStream dataOutputStream = null;
        FileOutputStream fileOutputStream = null;
        try
        {
            fileOutputStream = new FileOutputStream("data.bin");
            dataOutputStream = new DataOutputStream(fileOutputStream);

            dataOutputStream.writeInt(125);
            dataOutputStream.writeFloat(150.45F);
            dataOutputStream.writeLong(9090);
            dataOutputStream.writeBoolean(true);

            System.out.println("Successfully written primitive data's to \'data.bin\' file\n");
        }
        finally
        {
            if (dataOutputStream != null)
            {
                /*
                 * Closing a DataOutputStream will also
                 * close the OutputStream instance to which
                 * the DataOutputStream is writing.
                 */
                dataOutputStream.close();
            }
        }

    }
}

Output

Successfully written primitive data's to 'data.bin' file

data.bin

DataInputStreamDemo.java

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;

public class DataInputStreamDemo
{

    public static void main(String[] args) throws Exception
    {
        DataInputStreamDemo dataInputStreamDemo = new DataInputStreamDemo();
        dataInputStreamDemo.readPrimitiveData();
    }

    public void readPrimitiveData() throws IOException
    {
        FileInputStream fileInputStream = null;
        DataInputStream dataInputStream = null;

        try
        {
            fileInputStream = new FileInputStream("data.bin");
            dataInputStream = new DataInputStream(fileInputStream);

            int intValue = dataInputStream.readInt();
            float floatValue = dataInputStream.readFloat();
            long longValue = dataInputStream.readLong();
            boolean booleanValue = dataInputStream.readBoolean();

            System.out.println("intValue     = " + intValue);
            System.out.println("floatValue   = " + floatValue);
            System.out.println("longValue    = " + longValue);
            System.out.println("booleanValue = " + booleanValue);
        }
        finally
        {
            if (dataInputStream != null)
            {
                /*
                 * Closing a DataInputStream will also close
                 * the InputStream instance from which the
                 * DataInputStream is reading.
                 */
                dataInputStream.close();
            }
        }

    }

}

Output

intValue     = 125
floatValue   = 150.45
longValue    = 9090
booleanValue = true