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POHow to use ObjectOutput and Input Stream
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  1. POHow to use ObjectOutput and Input Stream
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    copied!<p>I am doing a homework assignment and I am almost finished with it. The last part here is to create a file, read from that file then the contents are used to perform some calculations. According to the API and a couple sites I looked at my syntax is correct but for some reason it is not performing as expected. Any help to steer me in the right direction would be appreciated. I am getting the exception errors for both reading and writing.</p> <pre><code>try{ //In the space below (between Marker 2 and Marker 3) declare an //ObjectOutputStream object called "outFile" for the purpose of //writing Fraction objects into a file called "fraction.out" //Marker 2 FileOutputStream fos = new FileOutputStream("fraction.out"); ObjectOutputStream outFile = new ObjectOutputStream(fos); //Marker 3 score += 5; outFile.writeObject(F[1]); outFile.writeObject(F[2]); outFile.writeObject(F[3]); outFile.close(); } catch(Exception e){ System.out.println("Could not write objects to file"); } try{ //In the space below (between Marker 4 and Marker 5) declare an //ObjectInputStream object called "inFile" for the purpose of //reading Fraction objects from a file called "fraction.out" //Marker 4 ObjectInputStream inFile = new ObjectInputStream(new FileInputStream("fraction.out")); //Marker 5 score += 5; //In the space below (between Marker 6 and Marker 7) Complete //statements that read three fraction objects from the file //as F[5], F[6], and F[7] //Marker 6 f[5] = (Fraction) inFile.readObject(); f[6] = (Fraction) inFile.readObject(); f[7] = (Fraction) inFile.readObject(); //Marker 7 inFile.close(); F[4] = F[5].multiply(F[6]).multiply(F[7]); score += 5; System.out.println("step 12:\tf4 = " + F[4]); } catch (Exception e){ System.out.println("Could not read objects from file"); } </code></pre>
 

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