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POJava linked list set method
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18133052
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2013-08-08T18:10:56.680
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2013-08-08T18:16:55.260
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I have to convert my ArrayList code to Linked list without using import.java.util.LinkedList. My previous code has 4 ArrayList (name, price, quantity, priority) I have to sort arraylist depends on ArrayList prioirty. So I did like this. <pre><code>public void sortPriority() { for (int i=0; i<name.length(); i++) { for (int j=0; j<priority.size()-i-1; j++) { if (priority.get(j).compareTo(priority.get(j+1)) > 0) { int temp1 = priority.get(j); priority.set(j,priority.get(j+1)); priority.set(j+1, temp1); String temp2 = name.get(j); name.set(j,name.get(j+1)); name.set(j+1, temp2); double temp3 = price.get(j); price.set(j,price.get(j+1)); price.set(j+1, temp3); int temp4 = quantity.get(j); quantity.set(j,quantity.get(j+1)); quantity.set(j+1, temp4); } } } } </code></pre> I changed my name ArrayList to Linked List. Since I cannot import java.util.LinkedList, I put my own code in other class called StringLinkedList. <pre><code>abstract class StringLinkedList implements LinkList { private ListNode head; public StringLinkedList() { head = null; } public void showList() { ListNode position = head; while (position != null) { System.out.println(position.getData()); position = position.getLink(); } } public int length() { int count = 0; ListNode position = head; while (position != null) { count++; position = position.getLink(); } return count; } public void addNodeToStart(String addData) { head = new ListNode(addData, head); } public void deleteHeadNode() { if (head != null) { head = head.getLink(); } else { System.out.println("Deleting from an empty list."); System.exit(0); } } public boolean onList(String target) { return find(target) != null; } private ListNode find(String target) { boolean found = false; ListNode position = head; while ((position != null) && !found) { String dataAtPosition = position.getData(); if (dataAtPosition.equals(target)) { found = true; } else { position = position.getLink(); } } return position; } public String get(int i) { assert (i>=0); ListNode current = this.head; while (i > 0) { i--; current = current.link; if (current == null) { return null; } } return current.data; } public String set (int index, String element) { ListNode current = this.head; ListNode e = current; String oldVal = e.element; e.element = element; return oldVal; } } </code></pre> Every other methods works fine besides my set(). What should I change?
Tags
<java><sorting><linked-list>
Title
Java linked list set method
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PostAcceptedAnswerId
1. PO
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 PTAnswer
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USJim Garrison
UserOwnerUserId
1. USboomboomboom
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1. This table or related slice is empty.
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1. This table or related slice is empty.
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1. PO
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2. PO
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1. VO
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 POJava linked list set method
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