src/main/java/nl/andrewlalis/model/TATeam.java

@@ -3,6 +3,7 @@ package nl.andrewlalis.model;
 import org.kohsuke.github.GHTeam;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 /**
@@ -31,6 +32,14 @@ public class TATeam extends Team {
         this.name = name;
     }
 
+    /**
+     * Gets a list of teaching assistants, as a convenience method to avoid having to do an array cast.
+     * @return An array of all teaching assistant members of this team.
+     */
+    public TeachingAssistant[] getTeachingAssistants() {
+        return Arrays.copyOf(this.getMembers(), this.memberCount(), TeachingAssistant[].class);
+    }
+
     public String getName() {
         return this.name;
     }

src/main/java/nl/andrewlalis/ui/view/DefineTaTeamsDialog.java

@@ -1,6 +1,7 @@
 package nl.andrewlalis.ui.view;
 
 import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.ui.view.list_models.TATeamListCellRenderer;
 import nl.andrewlalis.ui.view.list_models.TATeamListModel;
 import nl.andrewlalis.ui.view.list_models.TeachingAssistantListCellRenderer;
 import nl.andrewlalis.ui.view.list_models.TeachingAssistantsListModel;
@@ -18,6 +19,8 @@ import java.awt.*;
  */
 public class DefineTaTeamsDialog extends JDialog {
 
+    private static final Dimension LIST_SIZE = new Dimension(200, -1);
+
     /**
      * The manager used to manipulate the organization.
      */
@@ -63,6 +66,8 @@ public class DefineTaTeamsDialog extends JDialog {
 
         ListModel model = new TATeamListModel(this.manager.getTeams());
         JList teamsList = new JList(model);
+        teamsList.setCellRenderer(new TATeamListCellRenderer());
+        teamsList.setPreferredSize(LIST_SIZE);
         teamsList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
 
         JScrollPane teamsListScrollPane = new JScrollPane(teamsList);
@@ -84,6 +89,7 @@ public class DefineTaTeamsDialog extends JDialog {
         JList membersList = new JList();
         membersList.setModel(model);
         membersList.setCellRenderer(new TeachingAssistantListCellRenderer());
+        membersList.setPreferredSize(LIST_SIZE);
         membersList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
 
         JScrollPane membersListScrollPane = new JScrollPane(membersList);

src/main/java/nl/andrewlalis/ui/view/list_models/TATeamListCellRenderer.java

@@ -0,0 +1,33 @@
+package nl.andrewlalis.ui.view.list_models;
+
+import nl.andrewlalis.model.TATeam;
+import nl.andrewlalis.model.TeachingAssistant;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * Determines how list cells are rendered for a list of TATeams. In this case, it shows the team name, and the tooltip
+ * text provides a list of members.
+ */
+public class TATeamListCellRenderer extends DefaultListCellRenderer {
+
+    @Override
+    public Component getListCellRendererComponent(JList<?> jList, Object o, int i, boolean b, boolean b1) {
+        super.getListCellRendererComponent(jList, o, i, b, b1);
+        if (o instanceof TATeam) {
+            TATeam team = (TATeam) o;
+            this.setText(team.getName());
+            StringBuilder sb = new StringBuilder();
+            TeachingAssistant[] teachingAssistants = team.getTeachingAssistants();
+            for (int j = 0; j < teachingAssistants.length; j++) {
+                sb.append(teachingAssistants[j].getGithubUsername());
+                if (j < teachingAssistants.length - 1) {
+                    sb.append('\n');
+                }
+            }
+            this.setToolTipText(sb.toString());
+        }
+        return this;
+    }
+}

src/main/java/nl/andrewlalis/ui/view/list_models/TeachingAssistantListCellRenderer.java

@@ -5,6 +5,9 @@ import nl.andrewlalis.model.TeachingAssistant;
 import javax.swing.*;
 import java.awt.*;
 
+/**
+ * Controls what is rendered in a single list cell when displaying a list of TeachingAssistants.
+ */
 public class TeachingAssistantListCellRenderer extends DefaultListCellRenderer {
 
     @Override