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POCustom Methods for an Array of Custom Objects in Java
 

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  1. POCustom Methods for an Array of Custom Objects in Java
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    <p>I am trying to create an array of type <code>Library</code>, where I can store many objects of type <code>Library</code> that I'll manage later. Before I get too deep, I am trying to make a <code>print()</code> method on the array so that I can simply call <code>myLibrary.print()</code> to print the array.</p> <pre><code>public class Library { // Constructor public Library() { } public void print() { System.out.println("Library Sorted by Title"); } } public class MediaManager { public static void main(String[] args) throws Exception { Library myLibrary[] = new Library[100]; myLibrary.print(); } } </code></pre> <p>I am getting an error saying that there is no <code>print()</code> on <code>Library[]</code>.</p> <p>How would I go about printing this array? Would I just loop through the array in the main file and call a separate print on each object? If this is the case, where would I write custom methods to sort the array?</p> <p><strong>UPDATE</strong></p> <p>Requirements from my assignment: "Your program will use one array of type Library to store all information read from the input file." </p> <p>"At the top level you will have a class called Library. Library will have three subclasses: Music, Book, and Movie. Music will have two subclasses: Song and Album. Book will have two subclasses: Fiction and Nonfiction. Movie, Fiction, Nonfiction, Song, and Album will not have any subclasses."</p> <p><strong>UPDATE 2</strong></p> <p>This is for a CS-101 course. I don't feel I should need to use Comparable.</p>
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    1. USardavis
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    1. CODo you want to manage a set of Libraries, or do you want to manage Books/Titles within one Library? Means, do you have one Library with many Titles or do you have many Libraries (possibly again with many Titles)?
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      1. POCustom Methods for an Array of Custom Objects in Java
      1. USAndreas Fester
    2. COHere is the requirement: "Your program will use one array of type Library to store all information read from the input file." A Library is a class, Music, Book, and Movie are sublcasses. Then each of those have subclasses.
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      1. USardavis
    3. COwhy don't you use Collections framework ? in this case may be a List. here's a sorting method http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Collections.html#sort(java.util.List). you can also use `Arrays.toString(myLibrary)` or `Arrays.deepToString(myLibrary)`, to print the array all at once. chk this: http://stackoverflow.com/questions/409784/simplest-way-to-print-an-array-in-java
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      1. USSreenath S
 

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