Solution to UVA 10420

Main.java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Map;
import java.util.TreeMap;


public class Main {
	public static void main(String args[]) throws Exception {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(in.readLine());
		
		TreeMap<String, Integer> map = new TreeMap<String, Integer>();
		
		for (int count = 0; count < N; count++) {
			String line = in.readLine();
			String split[] = line.split(" ");
			String country = split[0];
			
			int countryCount = 0;
			
			if (map.containsKey(country)) {
				countryCount = map.get(country);
			}
			
			map.put(country, countryCount+1);
		}
		
		for (Map.Entry<String, Integer> e : map.entrySet()) {
			System.out.printf("%s %d\n", e.getKey(), e.getValue());
		}
	}
}

The for-loop at line 29 looks great but what exactly is going on in "(Map.Entry<String, ...)"?