*My assignment is to write a program that stores an array of five int values 1,2

Question

*My assignment is to write a program that stores an array of five int values 1,2,3,4, and 5, a Date object for current time, and a double value 5.5. into a file named Exercies19_2.txt. Next, I am to write a method in the program that opens Exercises19_2.txt, reads the data and displays to the command window in the following format:
FileName: <insert the file name using the file object properties>
Integers: <insert the integers on a single line>
DateTime: <insert the date object from the file>
Double: <insert the double value>

*When I run my program I keep getting this:

Exception in thread "main" java.io.OptionalDataException
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at WriteArray.main(WriteArray.java:29)

*Can you help me figure out what I am doing wrong????? Here is what I have written:

import java.io.*;

public class WriteArray {

public static void main(String[] args)throws ClassNotFoundException,IOException {
int[] numbers = {1, 2, 3, 4, 5};

//Create an output stream for file
ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream("Exercises19_2.txt", true));

//Write to file
output.writeDouble(5.5);
output.writeObject(numbers);
output.writeObject(new java.util.Date());
output.writeUTF("Exercises19_2.txt");

//Close the stream
output.close();

//Create an input stream for file
ObjectInputStream input = new ObjectInputStream(new FileInputStream("Exercises19_2.txt"));

int[]newNumbers = (int[])(input.readObject());
for (int i = 0; i < newNumbers.length; i++)
System.out.println("Integers: " + newNumbers[i] + " ");

String FileName= input.readUTF();
double Double = input.readDouble();
java.util.Date date = (java.util.Date)(input.readObject());
System.out.println("DateTime: " + date);


//Display the output

System.out.println("Double: " + " " + input.readDouble());
System.out.println("FileName: " + " " + input.readUTF());

//Close the stream
input.close();


}
}

Explanation / Answer

i think that you problem is that you havent importet the import java.util.Array; and you have to import java.util.Date; too also you are reading and passing a .txt file which everybody can read that including a human ,so you have to go ahead and change that to a binary file .bin

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