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DoublyLinkedList.java
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145 lines (96 loc) · 2.81 KB
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class NodeDouble{
public int data;
public NodeDouble prev;
public NodeDouble next;
public void displayData(){
System.out.println(data);
}
}
public class DoublyLinkedList{
NodeDouble head;
NodeDouble tail;
public void insert(int data){
NodeDouble temp = new NodeDouble();
if(head == null){
temp.data = data;
temp.next = head;
temp.prev = null;
head = temp;
tail = temp;
}
else{
temp.data = data;
temp.prev = null;
temp.next = head;
head.prev = temp;
head = temp;
}
}
public void displaybackWard(){
NodeDouble temp = tail;
while(temp != null){
System.out.println(temp.data);
temp = temp.prev;
}
}
public void display(){
NodeDouble temp = head;
while(temp != null){
System.out.println("->"+temp.data);
temp =temp.next;
}
}
public void delete(int data){
NodeDouble temp = head;
while(temp.data != data){
temp = temp.next;
}
temp.prev.next = temp.next;
temp.next.prev = temp.prev;
}
public void insertLast(int data){
NodeDouble temp = new NodeDouble();
temp.data = data;
NodeDouble temp2 = tail;
temp2.next = temp;
temp.prev = temp2;
temp.next = null;
tail = temp;
}
public void search(int data){
NodeDouble temp = head;
int temp1 = 0;
while(temp != null){
if(temp.data == data){
temp1 = 1;
break;
}
else{
temp1 = 0;
temp = temp.next;
}
}
if(temp1 == 1){
System.out.println("found, contains");
}
else{
System.out.println("Not found , does not contains");}
}
public static void main(String[] args){
DoublyLinkedList dll = new DoublyLinkedList();
dll.insert(4);
dll.insert(14);
dll.insert(166);
dll.display();
dll.displaybackWard();
dll.delete(14);
dll.display();
dll.displaybackWard();
dll.insertLast(2344);
dll.display();
dll.search(2344);
dll.search(4);
dll.search(15);
dll.search(145);
}
}