AbstractDlinkedList/Node.java at master · RT-four/AbstractDlinkedList · GitHub

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package rtfour;

public class Node extends ListItem {

    public Node(Object value){
        super(value);
    }

    @Override
    ListItem next() {
        return this.rightLink;
    }

    @Override
    ListItem setNext(ListItem item) {
        this.rightLink = item;
        return this.rightLink;
    }

    @Override
    ListItem previous() {
        return this.leftLink;
    }

    @Override
    ListItem setPrevious(ListItem item) {
        this.leftLink = item;
        return this.leftLink;
    }

    @Override
    int compareTo(ListItem item) {
        if(item !=null){
            return ((String) super.getValue()).compareTo((String) item.getValue());
        }
        else{
            return -1;
        }
    }
}