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Fix binary tree inorder and postorder traversals #1643

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Fix binary tree inorder and postorder traversals #1643

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12 changes: 6 additions & 6 deletions lectures/20-trees/code/introduction/BinaryTree.java
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Original file line number Diff line number Diff line change
Expand Up @@ -96,28 +96,28 @@ private void preOrder(Node node) {
}

public void inOrder() {
preOrder(root);
inOrder(root);
}

private void inOrder(Node node) {
if (node == null) {
return;
}
preOrder(node.left);
inOrder(node.left);
System.out.print(node.value + " ");
preOrder(node.right);
inOrder(node.right);
}

public void postOrder() {
preOrder(root);
postOrder(root);
}

private void postOrder(Node node) {
if (node == null) {
return;
}
preOrder(node.left);
preOrder(node.right);
postOrder(node.left);
postOrder(node.right);
System.out.print(node.value + " ");
}

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