Java help.......... please

Johnny_the_fox

I need help to write a program about Student Records in a linked list.

Student Record has ---> surname, firstname, course, year, age,id ca, ex...

Four Classes ....

1. Main Class
Methods-> Usual ****e

2. Class Linked list
Methods-> public LinkedList()
public void clear()
public boolean isEmpty()
public Node getHead()
public int length()
public void insert(int index, Object obj)
public void remove(int index)
public Node nodeAt(int index)

3. Class Node
Methods-> public Node(Object e, Node n)
public void setElement(Object newElem)
public void setNext(Node newNext)
public Object getElement()
public Node getNext()

4. Class StudentRec
Methods-> StudentRec // constructor
getSurname, getFirstname etc..//accessor methods



I need Help to write Methods that will

Sort the Surname

---

static void doSortBySurname() //Sort the list based on surnames.

find the Surname

---

static void doFindBySurname()//Find a particular student (based on surname) – the line following this command contains the surname to be used.

Delete the surname

---

static void doDeleteBySurname() //Delete a record (based on surname) – the line following this command contains the surname to be used.


thanks.............

satchmo

Hmmm... any specific questions? Well a few pointers:

Sort by Surname - There's a good page
here that explains a few different ways of sorting lists. Mergesort is a good one for linked lists, but you'll probably want an easier one like Selection Sort.
Find by Surname - Just loop through the list and check each Node's Object for it's surname. You'll have to cast back to StudentRec first though.
Delete by Surname - Once you find it as above, remove it's node from the list.

I'm sure people will point out that posting up homework in its entirety won't get you many constructive replies. Show some effort and anyone who can will help with questions about specific programming bits.

DeadBankClerk

import boards.homework.*;

public class FirstYear extends LeavingCert implements Assignment
{
}


(this was me last year

Johnny_the_fox

I wasnt lookin for some man to write it for me....

Just pointers


thanks Jazz..... that was helpful (Seriously)

gettin to the level where you can actually get constructive help from sun.com and other sites can be really tough with java though, as u've seen from my previous problems. but u can still ask qs if u try b4hand right? pwease?

Trojan

We are very willing to help, you just need to ask the right things.

Al.

Don't say:

I need to do X. Please help.

Do say:

I need to do X. What I reckon is that in order to do that, I need to do A, B and C, and possibly D.

I don't have a clue where to start with A, what do I need to do?

or:

I'm in the middle of coding Y, and it's not working, I need some help with my design. Here are my assumptions, what's wrong with them?

1.
2.
3.

Baz_

Nice trojan, that should be posted here always, like an announcement or something, or a special programming FAQ.

g'man

Johnny_the_fox

What about doin an announcement with recommended sites (which would be in plain English or even Irish) that will help the amateur Java programmer with the different topics such as linked lists etc…..?

Baz_

what about using a search engine to find your own until that happens.

www.programmingtutorials.com

should have a few good links on it.

Evil Phil

You could join IJUG They're good for links, questions etc. Same rules apply there that apply here, we won't right your code for you