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View Compilation Error

0_0_30484309_29353\Main.java:1: 错误: 类leetcode863_All_Nodes_Distance_k_in_binary_tree是公共的, 应在名为 leetcode863_All_Nodes_Distance_k_in_binary_tree.java 的文件中声明
public class leetcode863_All_Nodes_Distance_k_in_binary_tree {
       ^
0_0_30484309_29353\Main.java:2: 错误: 找不到符号
    Map<Integer, List<Integer>> map = new HashMap<>();
    ^
  符号:   类 Map
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:2: 错误: 找不到符号
    Map<Integer, List<Integer>> map = new HashMap<>();
                 ^
  符号:   类 List
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:3: 错误: 找不到符号
    public  List<Integer> distanceK(TreeNode root, TreeNode target, int K) {
                                    ^
  符号:   类 TreeNode
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:3: 错误: 找不到符号
    public  List<Integer> distanceK(TreeNode root, TreeNode target, int K) {
                                                   ^
  符号:   类 TreeNode
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:3: 错误: 找不到符号
    public  List<Integer> distanceK(TreeNode root, TreeNode target, int K) {
            ^
  符号:   类 List
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:27: 错误: 找不到符号
    public  void makeMap_with_recus(TreeNode parent, TreeNode child) {
                                    ^
  符号:   类 TreeNode
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:27: 错误: 找不到符号
    public  void makeMap_with_recus(TreeNode parent, TreeNode child) {
                                                     ^
  符号:   类 TreeNode
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:2: 错误: 找不到符号
    Map<Integer, List<Integer>> map = new HashMap<>();
                                          ^
  符号:   类 HashMap
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:4: 错误: 找不到符号
        List<Integer> bfs = new ArrayList<>();
        ^
  符号:   类 List
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:4: 错误: 找不到符号
        List<Integer> bfs = new ArrayList<>();
                                ^
  符号:   类 ArrayList
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:10: 错误: 找不到符号
        Set<Integer> visit = new HashSet<>(bfs);
        ^
  符号:   类 Set
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:10: 错误: 找不到符号
        Set<Integer> visit = new HashSet<>(bfs);
                                 ^
  符号:   类 HashSet
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:12: 错误: 找不到符号
            List<Integer> temp = new ArrayList<>();
            ^
  符号:   类 List
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:12: 错误: 找不到符号
            List<Integer> temp = new ArrayList<>();
                                     ^
  符号:   类 ArrayList
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:20: 错误: 找不到符号
            bfs = new ArrayList<>(temp);
                      ^
  符号:   类 ArrayList
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:33: 错误: 找不到符号
                List<Integer> list = new ArrayList<>();
                ^
  符号:   类 List
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:33: 错误: 找不到符号
                List<Integer> list = new ArrayList<>();
                                         ^
  符号:   类 ArrayList
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:42: 错误: 找不到符号
                List<Integer> list = new ArrayList<>();
                ^
  符号:   类 List
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
0_0_30484309_29353\Main.java:42: 错误: 找不到符号
                List<Integer> list = new ArrayList<>();
                                         ^
  符号:   类 ArrayList
  位置: 类 leetcode863_All_Nodes_Distance_k_in_binary_tree
20 个错误


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