List manipulation in java (add,delete,view,modify)
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This document contains information about a mentoring program run by Baabtra-Mentoring Partner. It includes a typing speed chart showing progress over 3 weeks. It also includes a jobs applied table showing 2 applications. The rest of the document discusses various Java programming concepts like collections, lists, arraylists, linkedlists, and examples of add, delete and display operations on lists. It ends with contact details for Baabtra.
List manipulation in java (add,delete,view,modify)
- 2. Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
- 4. Jobs Applied Week Company Designation Applied Date Current Status 1 Career port Programmer 6-10-2013 Waiting 2 Poornam info tech Software Engineer 30-9-2013 Waiting 3
- 5. Muhammed Noufal V T muhammednoufalvt@gmail.c om www.facebook.com/vtnoufa lvt twitter.com/noufalurnappy in.linkedin.com/pub/muham med-noufal 9744003056
- 6. Kinds of Collections • Collection—a group of objects, called elements – Set—An unordered collection with no duplicates – SortedSet—An ordered collection with no duplicates – List—an ordered collection, duplicates are allowed
- 7. List implementation • List is an interface; you can’t say new List () • There are two implementations: – LinkedList gives faster insertions and deletions – ArrayList gives faster random access • Syntax:– List list = new LinkedList ( ); – List list = new ArrayList ( );
- 8. Type Of List • ArrayList – Array lists are created with an initial size. When this size is exceeded, the collection is automatically enlarged. When objects are removed, the array may be shrunk. • LinkedList – LinkedList uses nodes to hold the elements. These nodes then point to each other, thus leading to the name "Linked" List
- 9. List Operations • Add – Syntax List name.add(item name); • Delete – Syntax List name.remove(item name); • Display – Syntax List name.get(item name);
- 10. Example
- 11. Add Operation public class Add { static ArrayList <Listbean> data = new ArrayList<Listbean>(); int adddata() { Listbean lb =new Listbean(); Scanner li = new Scanner(System.in); System.out.println("Enter your Item"); lb.setItem(li.next()); System.out.println("Enter your price"); lb.setPrice(li.next()); data.add(lb); return 0; }
- 12. Delete Operation • int remvdata() { System.out.println("Enter the position of item You want to remove: "); Scanner rmv = new Scanner(System.in); int x = rmv.nextInt(); data.remove(x); return 0; }
- 13. Display Operation • int dispdata() { if(data.isEmpty()) System.out.println("The Array is Empty"); else System.out.println("The Array Elements are: "); for(int i=0;i< data.size();i++) { Listbean beanObj=(Listbean) data.get(i); System.out.print(beanObj.getItem()); System.out.println("t"+beanObj.getPrice()); } return 0; }
- 16. Contact Us Emarald Mall (Big Bazar Building) Mavoor Road, Kozhikode, Kerala, India. Ph: + 91 – 495 40 25 550 Start up Village Eranakulam, Kerala, India. Email: info@baabtra.com NC Complex, Near Bus Stand Mukkam, Kozhikode, Kerala, India. Ph: + 91 – 495 40 25 550
Editor's Notes
- #10: Open EmployeeBean.java fileRight click inside the file select Source->Generate Getters and Setters