Node class

Node.java

package ua.edu.lnu.pif.ucs;
/*
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import java.util.Map;
import java.util.TreeMap;

/**
 *
 * @author pif
 */
public class Node {
    private Map<Integer, Node> children = new TreeMap<Integer, Node>();
    private String label;

    public void addEdge(Node node, int dist) {
        if (node == null) {
            throw new NullPointerException("edge");
        }
        children.put(dist, node);
    }

    public Node(String label) {
        if (label == null) {
            throw new NullPointerException("null label");
        }
        this.label = label;
    }

    public Map<Integer, Node> getChildren() {
        return children;
    }
    
    @Override
    public String toString() {
        return label;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Node other = (Node) obj;
        return this.label.equals(other.label);
    }

    @Override
    public int hashCode() {
        return label.hashCode();
    }
}