SingleLinkedList (not tested)

SingleLinkedList.java

import java.util.Arrays;

public class SingleLinkedList<T> {
	private SingleLinkedListNode<T> head;
	private int size;
	
	public SingleLinkedList(){
		this.head = new SingleLinkedListNode<T>();
		size = 0;
	}
	
	public boolean isEmpty(){
		return this.head.isNIL();
	}
	
	public void addLast(T element){
		SingleLinkedListNode<T> newNode = new SingleLinkedListNode<T>(element, null);
		if(this.head.isNIL()){
			newNode.setNext(head);
			this.head = newNode;
		}else{
			SingleLinkedListNode<T> aux = head;
			while(!(aux.getNext().isNIL())){
				aux = aux.getNext();
			}
			newNode.setNext(aux.getNext());
			aux.setNext(newNode);
			
		}
		this.size++;
	}
	
	public SingleLinkedListNode<T> search(T element){
		SingleLinkedListNode<T> aux = head;
		while(!aux.isNIL() && aux.getData() != element){
			aux = aux.getNext();
		}
		return aux;
	}
	
	public boolean remove(T element){
		if(isEmpty()){
			return false;
		
		}else if(head.getData().equals(element)){
			head = head.getNext();
			this.size--;
			return true;
		
		}else{
			SingleLinkedListNode<T> previous = null;
			SingleLinkedListNode<T> aux = head;
			while(!aux.isNIL() && !(aux.getData().equals(element))){
				previous = aux;
				aux = aux.getNext();
			}
			
			if(aux.isNIL()){
				return false;
			}else{
				previous.setNext(aux.getNext());
				this.size--;
				return true;
			}
		}
	}
	
	public int size(){
		return this.size;
	}
	
	public T[] toArray(){
		@SuppressWarnings("unchecked")
		T[] array = (T[]) new Object[this.size];
		SingleLinkedListNode<T> aux = head;
		int index = 0;
		while(!aux.isNIL()){
			array[index] = aux.getData();
			aux = aux.getNext();
			index++;
			
		}
		
		return array;
	}

}

public class SingleLinkedListNode<T> {
	private T data;
	private SingleLinkedListNode<T> next;
	
	public SingleLinkedListNode(){
		
	}
	
	public SingleLinkedListNode(T data, SingleLinkedListNode<T> next){
		this.data = data;
		this.next = next;
	}

	public boolean isNIL(){
		return (this.data == null);
	}

	public T getData() {
		return data;
	}

	public SingleLinkedListNode<T> getNext() {
		return next;
	}

	public void setNext(SingleLinkedListNode<T> next) {
		this.next = next;
	}
	
	
}