Adding in CS-115 coursework

cs-115-test/src/SwingTree.java

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+import javax.swing.*;
+import javax.swing.tree.DefaultMutableTreeNode;
+
+public class SwingTree {
+    public SwingTree() {
+        JFrame frame = new JFrame();
+
+        DefaultMutableTreeNode style = new DefaultMutableTreeNode("Trees");
+        DefaultMutableTreeNode deciduous = new DefaultMutableTreeNode("Deciduous");
+        DefaultMutableTreeNode evergreen = new DefaultMutableTreeNode("Evergreen");
+
+        style.add(deciduous);
+        style.add(evergreen);
+
+        DefaultMutableTreeNode maple = new DefaultMutableTreeNode("Maple");
+        DefaultMutableTreeNode oak = new DefaultMutableTreeNode("Oak");
+        DefaultMutableTreeNode linden = new DefaultMutableTreeNode("Linden");
+
+        deciduous.add(maple);
+        deciduous.add(oak);
+        deciduous.add(linden);
+
+        DefaultMutableTreeNode pine = new DefaultMutableTreeNode("Pine");
+        DefaultMutableTreeNode balsam = new DefaultMutableTreeNode("Balsam");
+        DefaultMutableTreeNode spruce = new DefaultMutableTreeNode("Spruce");
+
+        evergreen.add(pine);
+        evergreen.add(balsam);
+        evergreen.add(spruce);
+
+        JTree tree = new JTree(style);
+        frame.add(tree);
+        frame.setSize(1920, 1080);
+        frame.setVisible(true);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+
+    public static void main(String[] args) {
+        new SwingTree();
+    }
+}