
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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need the java code

Transcribed Image Text:# Tree Method Review
### Key Concepts:
- **TreeNode.java Methods:**
- `getValue()`: This method returns the element stored at the current node.
- `getChildren()`: This method returns a list of children (i.e., a list of TreeNodes).
### Instructions:
- **Assume** `t` is the tree rooted at the top node with the value `2`.
#### Task 1: Retrieve the Value `9`
- **Java Code:**
- To access the value `9` from the tree, use:
```java
t.getChildren().get(1).getChildren().get(0).getValue()
```
#### Task 2: Retrieve the Value `11`
- **Java Code:**
- To access the value `11`, type:
```java
t.getChildren().get(0).getChildren().get(1).getValue()
```
### Diagram Description:
The diagram illustrates a tree structure with:
- The root node labeled `2`.
- The first level of children: nodes `7` and `5`.
- The second level expands further:
- Node `7` has children `2` and `10`.
- Node `5` has children `6` and `9`.
- Continuing into the next level:
- Node `6` has a single child `11`.
- Node `9` has a single child `4`.
Annotations on the diagram:
- Root node `2` is indicated as `t`.
- Traversal paths to retrieve values like `9` and `11` are marked with arrows and circles, highlighting the traversal order.
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