Finished gameplay.

src/main/java/eu/tankernn/julklapp/Difficulty.java

@@ -0,0 +1,17 @@
+package eu.tankernn.julklapp;
+
+public enum Difficulty {
+	EASY(3, "Lätt"), MEDIUM(6, "Medel"), HARD(9, "Svår");
+	
+	public final String name;
+	public final int pairs;
+	
+	private Difficulty(int pairs, String name) {
+		this.pairs = pairs;
+		this.name = name;
+	}
+	
+	public String toString() {
+		return name + ", " + pairs + " par.";
+	}
+}

src/main/java/eu/tankernn/julklapp/Julspel.java

@@ -1,23 +1,35 @@
 package eu.tankernn.julklapp;
 
 import java.awt.EventQueue;
+import java.awt.GridLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import java.util.Random;
 
+import javax.swing.JButton;
+import javax.swing.JComboBox;
 import javax.swing.JFrame;
 import javax.swing.JOptionPane;
 
 public class Julspel {
-	public static final String[] NAMES = {"Claes", "Lars"}, GIFTS = {};
+	public static final String[] NAMES = { "Claes", "Lars", "Fredrik", "Rune-Bertil", "Pepita" }, GIFTS = {"Nalle", "PS4", "PC", "Spel", "Lego"};
 
 	private Random rand = new Random();
 
 	private JFrame frame;
+	private JComboBox<Difficulty> difficultyBox = new JComboBox<Difficulty>(Difficulty.values());
+	private JButton showAllBtn = new JButton("Visa namn och klappar."), startBtn = new JButton("Starta spelet!");
 
-	private int difficulty;
+	private int difficulty = 3;
 
 	private Map<String, String> associations = new HashMap<>();
 
@@ -48,36 +60,108 @@ public class Julspel {
 	 * Initialize the contents of the frame.
 	 */
 	private void initialize() {
-		generateAssociations();
+
 		frame = new JFrame();
-		frame.setBounds(100, 100, 450, 300);
+		frame.setLayout(new GridLayout(3, 1));
+
+		difficultyBox.addItemListener(new ItemListener() {
+			@Override
+			public void itemStateChanged(ItemEvent e) {
+				difficulty = ((Difficulty) e.getItem()).pairs;
+			}
+		});
+		frame.add(difficultyBox);
+		showAllBtn.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				displayLists(NAMES, GIFTS);
+			}
+		});
+		frame.add(showAllBtn);
+		startBtn.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				startGame();
+			}
+		});
+		frame.add(startBtn);
+
+		frame.pack();
 		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 	}
 
-	private void generateAssociations() {
-		List<String> names = Arrays.asList(NAMES), gifts = Arrays.asList(GIFTS);
-		for (int i = 0; i < difficulty; i++) {
-			associations.put(names.remove(rand.nextInt(names.size())), gifts.remove(rand.nextInt(gifts.size())));
+	private void startGame() {
+		associations = generateAssociations();
+
+		Iterator<Entry<String, String>> entries = associations.entrySet().iterator();
+
+		for (int i = 0; i < difficulty - 1; i++) {
+			Entry<String, String> e = entries.next();
+			JOptionPane.showMessageDialog(frame, e.getKey() + " får " + e.getValue() + ".");
 		}
+
+		Entry<String, String> secret = entries.next();
+		String guessName = JOptionPane.showInputDialog(frame, "Vem är kvar?").trim().toLowerCase();
+		String guessGift = JOptionPane.showInputDialog(frame, "Vad får " + guessName + "?").trim().toLowerCase();
+		String correctName = secret.getKey().toLowerCase();
+		String correctGift = secret.getValue().toLowerCase();
+		String response;
+		if (guessName.equals(correctName) && guessGift.equals(correctGift))
+			response = "Grattis! Du hade alla rätt!";
+		else if (guessName.equals(correctName))
+			response = "Rätt namn, men fel klapp. Rätt klapp var " + correctGift + ".";
+		else if (guessGift.equals(correctGift))
+			response = "Rätt klapp, men fel namn. Rätt namn var " + secret.getKey() + ".";
+		else
+			response = "Tyvärr, inga rätt. Rätt svar var: " + secret.getKey() + " får " + secret.getValue() + ".";
+		
+		JOptionPane.showMessageDialog(frame, response);
+	}
+
+	private Map<String, String> generateAssociations() {
+		Map<String, String> assoc = new HashMap<String, String>();
+		List<String> names = new ArrayList<String>(Arrays.asList(NAMES)), gifts = new ArrayList<String>(Arrays.asList(GIFTS));
+		
+		names = randomFilter(names, difficulty);
+		gifts = randomFilter(gifts, difficulty);
+		displayLists(names.toArray(new String[names.size()]), gifts.toArray(new String[names.size()]));
+		
+		while (!names.isEmpty()) {
+			assoc.put(names.remove(rand.nextInt(names.size())), gifts.remove(rand.nextInt(gifts.size())));
+		}
+		return assoc;
 	}
 	
-	private void showAll() {
+	/**
+	 * Removes elements from the list randomly to match the new size.
+	 * @param list The list to filter
+	 * @param newSize The target length of the list
+	 * @return The new list
+	 */
+	private List<String> randomFilter(List<String> list, int newSize) {
+		while (list.size() > newSize) {
+			list.remove(rand.nextInt(list.size()));
+		}
+		return list;
+	}
+
+	private void displayLists(String[] names, String[] gifts) {
 		StringBuilder sb = new StringBuilder();
 		sb.append("<html>");
-		sb.append("<h1>Names:</h1>");
-		
-		for (String name : NAMES) {
-			sb.append(name).append("<br>");
+		sb.append("<h3>Namn:</h3><ul>");
+
+		for (String name : names) {
+			sb.append("<li>").append(name).append("</li>");
 		}
-		
-		sb.append("<h1>Gifts:</h1>");
-		
-		for (String gift : GIFTS) {
-			sb.append(gift).append("<br>");
+
+		sb.append("</ul><h3>Klappar:</h3><ul>");
+
+		for (String gift : gifts) {
+			sb.append("<li>").append(gift).append("</li>");
 		}
-		
-		sb.append("</html>");
-		
+
+		sb.append("</ul></html>");
+
 		JOptionPane.showMessageDialog(frame, sb);
 	}