Practice Exercises Java - Learn to program performing exercises with Java

Practice Exercises Java

Learn to program performing exercises with Java

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Writing to a binary file - Practice Exercises Java

Lesson 8:

File management

Exercise 8.10:

Writing to a binary file


Create a program which asks the user for his name, his age (byte) and the year in which he was born (int) and stores them in a binary file.

Create also a reader to test that those data have been stored correctly.

Source Code:

import java.util.*;
public class BinaryWriterTest
	public static void main(String[] args)
		System.out.print("Enter your name: ");
		String name = new Scanner(;

		System.out.print("Enter your age: ");
		byte age = Byte.parseByte(new Scanner(;

		System.out.print("Enter your year of birth: ");
		int yearOfBirth = Integer.parseInt(new Scanner(;

		BinaryWriter file = new BinaryWriter(File.Open("data.dat", FileMode.Create));

		//Write data


		String datas;
		byte datab;
		int datai;

		BinaryReader inputFile = new BinaryReader(File.Open("data.dat", FileMode.Open));

		datas = inputFile.ReadString();
		datab = inputFile.ReadByte();
		datai = inputFile.ReadInt32();



		if ((!name.equals(datas)) || (datab != age) || (datai != yearOfBirth))
			System.out.println("Error in data");
			System.out.println("Read error");
Exercisey 8.10

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