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Java Program To Find Decimal Equivalent Of Binary Linked List

  • Last Updated : 03 Jan, 2022

Given a singly linked list of 0s and 1s find its decimal equivalent.

Input: 0->0->0->1->1->0->0->1->0
Output: 50   

Input: 1->0->0
Output: 4

The decimal value of an empty linked list is considered as 0.

Initialize the result as 0. Traverse the linked list and for each node, multiply the result by 2 and add the node’s data to it.

Java




// Java Program to find decimal value 
// of binary linked list 
class GFG{
      
// Link list Node 
static class Node 
    boolean data; 
    Node next; 
}; 
  
// Returns decimal value of binary 
// linked list
static int decimalValue(Node head) 
    // Initialized result 
    int res = 0
  
    // Traverse linked list 
    while (head != null
    
        // Multiply result by 2 and 
        // add head's data 
        res = (res << 1) + (head.data?1:0); 
  
        // Move next 
        head = head.next; 
    
    return res; 
  
// Utility function to create a 
// new node. 
static Node newNode(int data) 
    Node temp = new Node(); 
    temp.data = (data == 1
                 true : false); 
    temp.next = null
    return temp; 
  
// Driver code
public static void main(String args[])
    // Start with the empty list 
    Node head = newNode(1); 
    head.next = newNode(0); 
    head.next.next = newNode(1); 
    head.next.next.next = newNode(1); 
    System.out.print("Decimal value is "
                      decimalValue(head)); 
}
}
// This code is contributed by Arnab Kundu

Output : 

Decimal value is 11

Please refer complete article on Decimal Equivalent of Binary Linked List for more details!


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