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  1. class DataLinkedList {  
  2. 	public static class Node {
  3. 	    int data; 
  4. 	    Node nextNode;
  5.  
  6. 	    public Node(int data) {
  7. 	        this.data = data;
  8. 	        this.nextNode = null;       
  9. 	    }
  10.  
  11. 	    public int getData() {
  12. 	        return this.data;
  13. 	    }
  14. 	} // Node class
  15.  
  16.     private  Node head;
  17.     private int size; 
  18.  
  19.     public DataLinkedList(){
  20.         this.head = null;
  21.         this.size = 0;
  22.     }
  23.  
  24.     public void add(int data) {
  25.         Node node = new Node(data);
  26.         if (head == null) {
  27.             head = node;
  28.         } else {
  29.             Node currentNode = head;
  30.             while(currentNode.nextNode != null) {
  31.                 currentNode = currentNode.nextNode;
  32.             }
  33.             currentNode.nextNode = node;
  34.         }
  35.         size++;     
  36.     }
  37.  
  38.     public void sort() {
  39.         if (size > 1) {
  40.         	boolean wasChanged;
  41.  
  42.             do {
  43.                 Node current = head;
  44.                 Node previous = null;
  45.                 Node next = head.nextNode;
  46.                 wasChanged = false;
  47.  
  48.                 while ( next != null ) {
  49.                     if (current.data > next.data) {
  50.                         /*
  51.                         // This is just a literal translation
  52.                         // of bubble sort in an array
  53.                         Node temp = currentNode;
  54.                         currentNode = next;
  55.                         next = temp;*/
  56.                         wasChanged = true;
  57.  
  58.                         if ( previous != null ) {
  59.                         	Node sig = next.nextNode;
  60.  
  61.                         	previous.nextNode = next;
  62.                         	next.nextNode = current;
  63.                         	current.nextNode = sig;
  64.                         } else {
  65.                         	Node sig = next.nextNode;
  66.  
  67.                         	head = next;
  68.                         	next.nextNode = current;
  69.                         	current.nextNode = sig;
  70.                         }
  71.  
  72.                         previous = next;
  73.                         next = current.nextNode;
  74.                     } else { 
  75. 						previous = current;
  76. 	                    current = next;
  77. 	                    next = next.nextNode;
  78.                     }
  79.                 } 
  80.             } while( wasChanged );
  81.         }
  82.     }
  83.  
  84.     public int listSize() {     
  85.         return size;
  86.     }
  87.  
  88.     public void printData() {
  89.         Node currentNode = head;
  90.  
  91.         System.out.print("[ ");
  92.         while(currentNode != null) {
  93.             int data = currentNode.getData();
  94.             System.out.print(data + " ");
  95.             currentNode = currentNode.nextNode;
  96.         }
  97.  
  98.         System.out.print(" ]");
  99.         System.out.println();
  100.     }
  101.  
  102.     public boolean isEmpty() {
  103.         return size == 0;
  104.     }
  105. } // DataInterface class
  106.  
  107. class Ideone {
  108.  
  109.     public static void main (String[]args) {
  110.  
  111.         DataLinkedList dll = new DataLinkedList();
  112.  
  113.         dll.add(8);
  114.         dll.add(4);
  115.         dll.add(3);
  116.         dll.add(7);
  117.         dll.add(6);
  118.         dll.add(1);
  119.  
  120. 		dll.printData();
  121.         dll.sort();
  122.         dll.printData();
  123.         System.out.println("List size: " + dll.listSize());
  124.     }
  125. }
Success #stdin #stdout 0.1s 320256KB
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stdin
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Standard input is empty
stdout
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[ 8 4 3 7 6 1  ]
[ 1 3 4 6 7 8  ]
List size: 6
https://ideone.com/HW5zw7
Sorting a single linked list with bubble sort.
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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