Java Tutorial : Java IO (DataInputStream)

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Java Tutorial : Java IO (DataInputStream) 

Java Tutorial : Java IO (DataInputStream) 

Java Tutorial : Java IO (DataInputStream) 

Java Tutorial : Java IO (DataInputStream) 

Java Tutorial : Java IO (DataInputStream) 

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

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

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

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