beispiele_pr2/src/main/java/pr2/datenstrukturen/bt/BinaryTree.java

package pr2.datenstrukturen.bt;

class Node {
    int data;
    Node left;
    Node right;

    public Node(int item) {
        data = item;
        left = right = null;
    }
}

public class BinaryTree {
    // Wurzel des Baums
    Node root;

    public BinaryTree() {
        root = null;
    }

    public void insert(int key) {
        root = insertRec(root, key);
    }

    private Node insertRec(Node root, int key) {

        if (root == null) {
            root = new Node(key);
            return root;
        }

        if (key < root.data)
            root.left = insertRec(root.left, key);
        else if (key > root.data)
            root.right = insertRec(root.right, key);

        return root;
    }

    public void inorder()  {
        inorderRec(root);
    }

    void inorderRec(Node root) {
        if (root != null) {
            inorderRec(root.left);
            System.out.println(root.data);
            inorderRec(root.right);
        }
    }

    public static void main(String[] args) {
        BinaryTree tree = new BinaryTree();

        tree.insert(50);
        tree.insert(30);
        tree.insert(20);
        tree.insert(40);
        tree.insert(70);
        tree.insert(60);
        tree.insert(80);

        tree.inorder();
    }
}