二叉树BinaryTree.java类实现以下方法：输出所有直径及其路径长度 public static<T> void diameterAll(BinaryTree<T> bitree)

以下是一个简单的二叉树实现的Java代码，包含了输出所有直径及其路径长度的方法：

public class BinaryTree<T> {
    private Node<T> root;

    // 构造函数
    public BinaryTree(Node<T> root) {
        this.root = root;
    }

    // 节点类
    private static class Node<T> {
        private T data;
        private Node<T> left;
        private Node<T> right;

        public Node(T data) {
            this.data = data;
            this.left = null;
            this.right = null;
        }
    }

    // 输出所有直径及其路径长度
    public static <T> void diameterAll(BinaryTree<T> bitree) {
        if (bitree.root == null) {
            System.out.println("Binary tree is empty.");
            return;
        }

        List<List<Node<T>>> paths = new ArrayList<>();
        List<Integer> diameters = new ArrayList<>();

        findPaths(bitree.root, paths, new ArrayList<>());
        calculateDiameters(bitree.root, paths, diameters);

        for (int i = 0; i < diameters.size(); i++) {
            System.out.println("Diameter: " + diameters.get(i) + ", Path: ");
            for (Node<T> node : paths.get(i)) {
                System.out.print(node.data + " ");
            }
            System.out.println();
        }
    }

    // 查找所有路径
    private static <T> void findPaths(Node<T> node, List<List<Node<T>>> paths, List<Node<T>> path) {
        if (node == null) {
            return;
        }

        path.add(node);

        if (node.left == null && node.right == null) {
            paths.add(new ArrayList<>(path));
        } else {
            findPaths(node.left, paths, path);
            findPaths(node.right, paths, path);
        }

        path.remove(path.size() - 1);
    }

    // 计算直径
    private static <T> int calculateDiameters(Node<T> node, List<List<Node<T>>> paths, List<Integer> diameters) {
        if (node == null) {
            return 0;
        }

        int leftHeight = calculateDiameters(node.left, paths, diameters);
        int rightHeight = calculateDiameters(node.right, paths, diameters);

        int diameter = leftHeight + rightHeight;
        diameters.add(diameter);

        return Math.max(leftHeight, rightHeight) + 1;
    }

    public static void main(String[] args) {
        // 创建二叉树示例
        Node<Integer> node1 = new Node<>(1);
        Node<Integer> node2 = new Node<>(2);
        Node<Integer> node3 = new Node<>(3);
        Node<Integer> node4 = new Node<>(4);
        Node<Integer> node5 = new Node<>(5);

        node1.left = node2;
        node1.right = node3;
        node2.left = node4;
        node3.right = node5;

        BinaryTree<Integer> bitree = new BinaryTree<>(node1);

        // 输出所有直径及其路径长度
        diameterAll(bitree);
    }
}

这段代码使用了二叉树的先序遍历来查找所有路径，然后计算每个路径的直径。最后，输出每个直径及其路径长度。以上是一个简单的实现，你可以根据自己的需求进行修改和扩展。