java/queue.java at main · shivam01mishra/java · GitHub

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public class queue {
    class node{
        int val;
        node next=null;
        public node(int val)
        {
            this.val=val;
        }

       };
       node head=null;
       node tail=null;

       public void push(int x)
       {
        node temp=new node(x);
        if(head==null)
        {
            head=temp;
            tail=temp;
        }
        else
        {
        tail.next=temp;
        tail=temp.next;
        }

       }
       public void pop()
       {
        head=head.next;
       }

       public void printlist()
       {
        node temp=head;
        System.out.println("lest elements are");
        while(temp!=null)
        {
            System.out.println(temp.val+"-> ");
            temp=temp.next;
        }

       }

       public int front()
        {
            return head.val;

        }


}