DZone Snippets is a public source code repository. Easily build up your personal collection of code snippets, categorize them with tags / keywords, and share them with the world

Roger has posted 34 posts at DZone. View Full User Profile

Java Comparator Interface

  • submit to reddit
        // A quick example of how to sort two objects using Java's Comparator interface.
// The call to Collections.sort uses an anonymous inner function to define
// the comparison between two objects.

    public String[] sortNodes(ArrayList<Node> nodes) {
        Node[] sortedNodes = new Node[nodes.size()];
        Collections.sort(nodes, new Comparator<Node>() {
            public int compare(Node o1, Node o2) {
                return o2.priority - o1.priority;
        for (int i=0; i < nodes.size(); i++) {
            sortedNodes [i] = nodes.get(i);
        return sortedNodes ;
class Node{
    public String name = null;
    public int priority;