Databases
StackOverflow2013
Postsdbo
POSuper & Sub Classes
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POSuper & Sub Classes
    primarykey
    data
    text
    <ol> <li><p>this is my application class where i have instead array of objects </p></li> <li><p><code>loanBook</code> is a super class and <code>loanDocumentry</code> is a sub class that extends loanBook. This is declared at the top of the application class</p> <p>public static loanBook[] bookArray = new loanDocumetry[5];</p></li> </ol> <p>then in my application class i have to add new documentry book so i use the scanner for inputs and then use them to add the new object </p> <pre><code>bookArray[i] = new loanDocumentry( title, author, publisher, year, noOfPages, genre); </code></pre> <p>and the book count in <code>loanBook</code> increases so I know each time I run the method it creates new book but when then printing the array out it looks like it never added any of those books to the array and that the only one i have added is the last one </p> <p>Application Class:</p> <pre><code>public class ApplicationClass { public static Scanner input = new Scanner(System.in); public static loanBook[] bookArray = new loanDocumentry[5]; public static void main(String[] args) { addBook(); } public static void addBook() { input.nextLine(); String title; String author; String publisher; int year; int noOfPages; String genre; String choice; int i = 0; System.out.print("\nTITLE of the book: "); title = input.nextLine(); System.out.print("AUTHOR of the book: "); author = input.nextLine(); System.out.print("PUBLISHER of the book: "); publisher = input.nextLine(); System.out.print("YEAR book was published in: "); year = input.nextInt(); System.out.print("NUMBER OF PAGES the book has: "); noOfPages = input.nextInt(); System.out.print("GENRE of the book: "); input.nextLine(); genre = input.nextLine(); bookArray[i] = new loanDocuemntry(title, author, publisher, year, noOfPages, genre); i++; </code></pre> <p>}</p> <p>loanBook Superclass &amp; loanDocumentry Sub class both use set and gets</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USWanderer
    1. USuser3057408
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POSuper & Sub Classes
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. POSuper & Sub Classes
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    3. VO
      singulars
      1. POSuper & Sub Classes
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhy instead of comment what you've done, post your code?
      singulars
      1. POSuper & Sub Classes
      1. USnachokk
    2. COits a very long code that has 4 different java files and its menu driven there is a lot of print statments etc
      singulars
      1. POSuper & Sub Classes
      1. USuser3057408
    3. CORelated material: http://stackoverflow.com/questions/12878879/subtype-polymorphism-and-arrays Also try removing static from the declaration.
      singulars
      1. POSuper & Sub Classes
      1. USryanlutgen
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload