Trees and BST in Java
Practice this questionWANT TO UNDERSTAND THE CONCEPT FIRST?Learn Trees and BST in Java
Tree node
class TreeNode {
int val;
TreeNode left;
TreeNode right;
TreeNode(int val) { this.val = val; }
}Problems to practice
- Inorder traversal
- Preorder traversal
- Postorder traversal
- Level order traversal
- Maximum depth
- Diameter of tree
- LCA
- Validate BST
- Path Sum
Example: DFS traversal
void inorder(TreeNode root) {
if (root == null) return;
inorder(root.left);
System.out.print(root.val + " ");
inorder(root.right);
}Interview guidance
BST property helps with search and sorted traversal.
Adapted from 15_DSA_JAVA.md · “7. Trees and BST in Java”. Code examples are study fragments. Difficulty and core labels are editorial estimates; version-specific behavior should be checked against your project.