leaderboard: added method buildLeaderboard

src/main/java/de/tims/leaderboard/Leaderboard.java

@@ -1,6 +1,7 @@
 package de.tims.leaderboard;
 
 import java.util.List;
+import javax.swing.*;
 
 import de.tims.player_management.Player;
 
@@ -40,5 +41,17 @@ public class Leaderboard {
 		
 		return top10Players;
 	}
+	
+	public JPanel buildLeaderboard() {
+		JPanel mainPanel = new JPanel();
+		
+		Player[] top10Players = getTop10Players();
+		
+		for (int i = 0; i < top10Players.length; i++) {
+			mainPanel.add(new JLabel(i + 1 + ". " + top10Players[i].getName() + "    " + top10Players[i].getPoints()));
+		}
+		
+		return mainPanel;
+	}
 
 }

src/main/java/de/tims/leaderboard/LeaderboardGUITest.java

@@ -0,0 +1,32 @@
+package de.tims.leaderboard;
+
+import java.util.List;
+
+import javax.swing.*;
+
+import de.tims.player_management.Player;
+
+public class LeaderboardGUITest {
+
+	private JFrame frame;
+	private JPanel panel;
+	Leaderboard leaderboard;
+	
+	public LeaderboardGUITest() {
+		frame = new JFrame("LeaderboardGUITest");
+		leaderboard = new Leaderboard(List.of(new Player("Eins", 0), new Player("Zwei", 130), new Player("Drei", 20), new Player("Vier", 10),
+								new Player("Fuenf", 20), new Player("Sechs", 70), new Player("Sieben", 60), new Player("Acht", 20),
+								new Player("Neun", 60), new Player("Zehn", 50), new Player("Elf", 90), new Player("Zwoelf", 20),
+								new Player("Dreizehn", 40), new Player("Vierzehn", 80)), "Neun");
+		panel = leaderboard.buildLeaderboard();
+		
+		frame.add(panel);
+		frame.setSize(240, 240);
+		frame.setVisible(true);
+	}
+	
+	public static void main(String[] args) {
+		new LeaderboardGUITest();
+	}
+
+}