AddLast isnt working

[ParagKumar]

public void addLast(int item) {

	// create a new node
	Node nn = new Node();
	nn.data = item;
	nn.next = null;
	
	//attach
	if(this.size >= 1) {
		this.tail.next = nn;
		
		//summary object
		if(this.size == 0) {
			this.head =nn;
			this.tail = nn;
			this.size++;
		}else {
			this.tail = nn;
			this.size++;
		}
	}
}

[aa1 (Abha Agrawal)]

@ParagKumar

//attach
 if(this.size >= 1) { 
       this.tail.next = nn;

close this if loop here