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  1. import java.util.Random;
  2.  
  3.  
  4. public class Main {
  5.     public static void main(String[] args) {
  6.         Random random = new Random();
  7.         BinaryTree tree = new BinaryTree();
  8.         for (int i = 0; i < 10; i++) {
  9.             tree.add(random.nextInt(10));
  10.         }
  11.         tree.dump();
  12.     }
  13. }
  14.  
  15. class BinaryTree {
  16.     Node root = new EmptyNode();
  17.  
  18.     void add(int value) {
  19.         this.root.add(new RootResult(this), value);
  20.     }
  21.  
  22.     void dump() {
  23.         this.root.dump("");
  24.     }
  25. }
  26.  
  27. interface Node {
  28.     void add(Result result, int value);
  29.     void dump(String space);
  30. }
  31.  
  32. class EmptyNode implements Node {
  33.     @Override
  34.     public void add(Result result, int value) {
  35.         result.setResult(new ValueNode(value, this, this));
  36.     }
  37.  
  38.     @Override
  39.     public void dump(String space) {
  40.     }
  41. }
  42.  
  43. class ValueNode implements Node {
  44.     int value;
  45.     Node left;
  46.     Node right;
  47.  
  48.     ValueNode(int value, Node left, Node right) {
  49.         this.value = value;
  50.         this.left = left;
  51.         this.right = right;
  52.     }
  53.  
  54.     @Override
  55.     public void add(Result result, int value) {
  56.         if (value < this.value) {
  57.             this.left.add(new LeftResult(this), value);
  58.         } else {
  59.             this.right.add(new RightResult(this), value);
  60.         }
  61.     }
  62.  
  63.     @Override
  64.     public void dump(String space) {
  65.         this.right.dump(space + "  ");
  66.         System.out.println(space + this.value);
  67.         this.left.dump(space + "  ");
  68.     }
  69. }
  70.  
  71. interface Result {
  72.     void setResult(ValueNode valueNode);
  73. }
  74.  
  75. class RootResult implements Result {
  76.     BinaryTree tree;
  77.  
  78.     RootResult(BinaryTree tree) {
  79.         this.tree = tree;
  80.     }
  81.  
  82.     @Override
  83.     public void setResult(ValueNode root) {
  84.         tree.root = root;
  85.     }
  86. }
  87.  
  88. class LeftResult implements Result {
  89.     ValueNode node;
  90.  
  91.     LeftResult(ValueNode node) {
  92.         this.node = node;
  93.     }
  94.  
  95.     @Override
  96.     public void setResult(ValueNode left) {
  97.         node.left = left;
  98.     }
  99. }
  100.  
  101. class RightResult implements Result {
  102.     ValueNode node;
  103.  
  104.     RightResult(ValueNode node) {
  105.         this.node = node;
  106.     }
  107.  
  108.     @Override
  109.     public void setResult(ValueNode right) {
  110.         node.right = right;
  111.     }
  112. }
  113.  
  114.  
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin 
Standard input is empty
stdout 
  9
9
        7
      7
    6
        5
      4
  4
      0
    0
https://ideone.com/kstaTC
language:
Java (12.0.1)
created:
11 years ago
visibility:
public

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