diff --git a/core-java-concurrency/src/main/java/com/baeldung/threadpool/TreeNode.java b/core-java-concurrency/src/main/java/com/baeldung/threadpool/TreeNode.java
index 9b43152074..a3283cf930 100644
--- a/core-java-concurrency/src/main/java/com/baeldung/threadpool/TreeNode.java
+++ b/core-java-concurrency/src/main/java/com/baeldung/threadpool/TreeNode.java
@@ -1,18 +1,25 @@
 package com.baeldung.threadpool;
 
-import java.util.Set;
-
 import com.google.common.collect.Sets;
 
+import java.util.Set;
+
 public class TreeNode {
 
-    int value;
+    private int value;
 
-    Set<TreeNode> children;
+    private Set<TreeNode> children;
 
-    public TreeNode(int value, TreeNode... children) {
+    TreeNode(int value, TreeNode... children) {
         this.value = value;
         this.children = Sets.newHashSet(children);
     }
 
-}
+    public int getValue() {
+        return value;
+    }
+
+    public Set<TreeNode> getChildren() {
+        return children;
+    }
+}
\ No newline at end of file