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javaʵÏÖÊ÷ÈÝÒ×Âð - Java / Java SE

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Java code:
¸øÄãÒ»¸ö´úÂ루¶þ²æËÑË÷Ê÷£©±È½Ï¼òµ¥¿ÉÒÔ×Ô¼º¸Ä¸Ä
package test;

/**
* ½Úµã
* @author Administrator
*/
public class Node {

int i;
Node leftNode;
Node rightNode;
}
-------------------------¡µ¡µ¡µ¡µ¡µ
package test;

import java.util.Random;

/**
* ¶þ²æËÑË÷Ê÷
* @author Administrator
*
*/
public class Tree {

Node root;//¸ù½Úµã
/**
* ²éÕÒ½Úµã
* @param key ²éÕҵĹؼü×Ö
* @return ¹Ø¼ü×ÖËùÔÚ½Úµã
*/
public Node find(int key){
Node currentNode = root;
while(currentNode.i != key){
if(key > currentNode.i){
currentNode = currentNode.rightNode;
}else{
currentNode = currentNode.leftNode;
}
if(null == currentNode){
return null;
}
}
return currentNode;
}
/**
* ²éÕÒ×î´óµÄ½Úµã
* @return ×î´óµÄ½Úµã
*/
public Node findMax(){
Node currentNode = root;
while(null != currentNode.rightNode){
currentNode = currentNode.rightNode;
}
return currentNode;
}
/**
* ²éÕÒ×îСµÄ½Úµã
* @return ×îСµÄ½Úµã
*/
public Node findMin(){
Node currentNode = root;
while(null != currentNode.leftNode){
currentNode = currentNode.leftNode;
}
return currentNode;
}
/**
* ±éÀúÊ÷
* @param node
*/
public void traverse(Node node){
if(null != node){
traverse(node.leftNode);
System.out.println(node.i);
traverse(node.rig


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