Loads a list of Strings into a HashMap. Usage: java HashMapVictim < collisionStrings.txt

HashMapVictim.java

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class HashMapVictim {
    final static Object PRESENT = new Object();

    public static void main(String[] args) {
        Map<String, Object> map = new HashMap<String, Object>();
        Scanner sc = new Scanner(System.in);
        String first = null;
        while (sc.hasNext()) {
            String key = sc.next();
            if (null == first) first = key;
            // PUTS go at start of chain
            map.put(key, PRESENT);
            // THEREFORE, the FIRST is at the END
            map.get(first);
        }
    }
}