java

package de.hstrier.rockyou;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

public class Reader {
	private HashMap<String, Integer> hashmap;

	public Reader(File fileToRead, HashMap<String, Integer> hashmap)
			throws FileNotFoundException {
		this.hashmap = hashmap;
		this.readFile(fileToRead);
	}

	private void readFile(final File file) throws FileNotFoundException {
		Runnable r = new Runnable() {

			@Override
			public void run() {
				try (BufferedReader reader = new BufferedReader(
						new InputStreamReader(new FileInputStream(file), "UTF8"))) {
					String line = null;
					String value;
					while ((line = reader.readLine()) != null) {
						value = line.trim();
						Reader.this.incrementHashMapValue(value);
					}
					printHashMap();
				} catch (Exception e) {
					e.printStackTrace();

				}
			}
		};
		Thread t = new Thread(r);
		t.start();
	}

	public synchronized void incrementHashMapValue(String key) {
		Integer value = this.hashmap.get(key);
		if (value != null) {
			this.hashmap.put(key, new Integer(value.intValue() + 1));
		} else {
			this.hashmap.put(key, 1);
		}
	}

	public static void main(String[] args) throws FileNotFoundException {
		File fileToRead = new File("/Users/janmeier/Downloads/rockyou.txt");
		HashMap<String, Integer> hashmap = new HashMap<String, Integer>();

		Reader reader = new Reader(fileToRead, hashmap);
	}

	private void printHashMap() {
		for (Map.Entry<String, Integer> elem : this.hashmap.entrySet()) {
			if (elem.getValue() > 1) {

				System.out
						.println(elem.getKey() + " times: " + elem.getValue());
			}
		}
		System.out.println(this.hashmap.size());
	}
}