java树的建立代码 java 创建树

用java怎么构造一个二叉树呢?java构造二叉树,可以通过链表来构造,如下代码:
public class BinTree {
public final static int MAX=40;
BinTree []elements = new BinTree[MAX];//层次遍历时保存各个节点
int front;//层次遍历时队首
int rear;//层次遍历时队尾
private Object data; //数据元数
private BinTree left,right; //指向左,右孩子结点的链
public BinTree()
{
}
public BinTree(Object data)
{ //构造有值结点
this.data = https://www.04ip.com/post/data;
left = right = null;
}
public BinTree(Object data,BinTree left,BinTree right)
{ //构造有值结点
this.data = https://www.04ip.com/post/data;
this.left = left;
this.right = right;
}
public String toString()
{
return data.toString();
}
//前序遍历二叉树
public static void preOrder(BinTree parent){
if(parent == null)
return;
System.out.print(parent.data " ");
preOrder(parent.left);
preOrder(parent.right);
}
//中序遍历二叉树
public void inOrder(BinTree parent){
if(parent == null)
return;
inOrder(parent.left);
System.out.print(parent.data " ");
inOrder(parent.right);
}
//后序遍历二叉树
public void postOrder(BinTree parent){
if(parent == null)
return;
postOrder(parent.left);
postOrder(parent.right);
System.out.print(parent.data " ");
}
// 层次遍历二叉树
public void LayerOrder(BinTree parent)
{
elements[0]=parent;
front=0;rear=1;
while(frontrear)
{
try
{
if(elements[front].data!=null)
{
System.out.print(elements[front].data" ");
if(elements[front].left!=null)
elements[rear]=elements[front].left;
if(elements[front].right!=null)
elements[rear]=elements[front].right;
front;
}
}catch(Exception e){break;}
}
}
//返回树的叶节点个数
public int leaves()
{
if(this == null)
return 0;
if(left == nullright == null)
return 1;
return (left == null ? 0 : left.leaves()) (right == null ? 0 : right.leaves());
}
//结果返回树的高度
public int height()
{
int heightOfTree;
if(this == null)
return -1;
int leftHeight = (left == null ? 0 : left.height());
int rightHeight = (right == null ? 0 : right.height());
heightOfTree = leftHeightrightHeight?rightHeight:leftHeight;
return 1heightOfTree;
}
//如果对象不在树中,结果返回-1;否则结果返回该对象在树中所处的层次,规定根节点为第一层
public int level(Object object)
{
int levelInTree;
if(this == null)
return -1;
if(object == data)
return 1;//规定根节点为第一层
int leftLevel = (left == null?-1:left.level(object));
int rightLevel = (right == null?-1:right.level(object));
if(leftLevel0rightLevel0)
return -1;
levelInTree = leftLevelrightLevel?rightLevel:leftLevel;
return 1 levelInTree;
}
//将树中的每个节点的孩子对换位置
public void reflect()
{
if(this == null)
return;
if(left != null)
left.reflect();
if(right != null)
right.reflect();
BinTree temp = left;
left = right;
right = temp;
}
// 将树中的所有节点移走,并输出移走的节点
public void defoliate()
{
if(this == null)
return;
//若本节点是叶节点 , 则将其移走
if(left==nullright == null)
{
System.out.print(this" ");
data = https://www.04ip.com/post/null;
return;
}
//移走左子树若其存在
if(left!=null){
left.defoliate();
left = null;
}
//移走本节点,放在中间表示中跟移走...
String innerNode= this" ";
data = https://www.04ip.com/post/null;
//移走右子树若其存在
if(right!=null){
right.defoliate();
right = null;
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
BinTree e = new BinTree("E");
BinTree g = new BinTree("G");
BinTree h = new BinTree("H");
BinTree i = new BinTree("I");
BinTree d = new BinTree("D",null,g);
BinTree f = new BinTree("F",h,i);
BinTree b = new BinTree("B",d,e);
BinTree c = new BinTree("C",f,null);
BinTree tree = new BinTree("A",b,c);
System.out.println("前序遍历二叉树结果: ");
tree.preOrder(tree);
System.out.println();
System.out.println("中序遍历二叉树结果: ");
tree.inOrder(tree);
System.out.println();
System.out.println("后序遍历二叉树结果: ");
tree.postOrder(tree);
System.out.println();
System.out.println("层次遍历二叉树结果: ");
tree.LayerOrder(tree);
System.out.println();
System.out.println("F所在的层次: " tree.level("F"));
System.out.println("这棵二叉树的高度: " tree.height());
System.out.println("--------------------------------------");
tree.reflect();
System.out.println("交换每个节点的孩子节点后......");
System.out.println("前序遍历二叉树结果: ");
tree.preOrder(tree);
System.out.println();
System.out.println("中序遍历二叉树结果: ");
tree.inOrder(tree);
System.out.println();
System.out.println("后序遍历二叉树结果: ");
tree.postOrder(tree);
System.out.println();
System.out.println("层次遍历二叉树结果: ");
tree.LayerOrder(tree);
System.out.println();
System.out.println("F所在的层次: " tree.level("F"));
System.out.println("这棵二叉树的高度: " tree.height());
}
java中如何建立一个java树,请详解?import java.awt.*;
import javax.swing.*;
class TreeDemo extends JFrame
{
public TreeDemo()
{
setSize(400,300);
setTitle("演示怎样使用JTree");
show();
JScrollPane jPanel=new JScrollPane();
getContentPane().add(jPanel);
JTree jtree=new JTree();
jPanel.getViewport().add(jtree,null);
validate();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
public class Example5_25
{
public static void main(String[] args)
{
TreeDemo frame=new TreeDemo();
}
}
其中JScrollPane是一个带滚动条的面板类 。
将对象加入到带滚动条的面板类中,在将已建的数放入到其中 。
就可建立一个系统默认的树结构 。
用java怎么构造一个二叉树?二叉树的相关操作java树的建立代码,包括创建java树的建立代码,中序、先序、后序(递归和非递归),其中重点的是java在先序创建二叉树和后序非递归遍历的的实现 。
package com.algorithm.tree;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Queue;
import java.util.Scanner;
import java.util.Stack;
import java.util.concurrent.LinkedBlockingQueue;
public class Tree {
private Node root;
public Tree() {
}
public Tree(Node root) {
this.root = root;
}
//创建二叉树
public void buildTree() {
Scanner scn = null;
try {
scn = new Scanner(new File("input.txt"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
root = createTree(root,scn);
}
//先序遍历创建二叉树
private Node createTree(Node node,Scanner scn) {
String temp= scn.next();
if (temp.trim().equals("#")) {
return null;
} else {
node = new Node((T)temp);
node.setLeft(createTree(node.getLeft(), scn));
node.setRight(createTree(node.getRight(), scn));
return node;
}
}
//中序遍历(递归)
public void inOrderTraverse() {
inOrderTraverse(root);
}
public void inOrderTraverse(Node node) {
if (node != null) {
inOrderTraverse(node.getLeft());
System.out.println(node.getValue());
inOrderTraverse(node.getRight());
}
}
//中序遍历(非递归)
public void nrInOrderTraverse() {
StackNode stack = new StackNode();
Node node = root;
while (node != null || !stack.isEmpty()) {
while (node != null) {
stack.push(node);
node = node.getLeft();
}
node = stack.pop();
System.out.println(node.getValue());
node = node.getRight();
}
}
//先序遍历(递归)
public void preOrderTraverse() {
preOrderTraverse(root);
}
public void preOrderTraverse(Node node) {
if (node != null) {
System.out.println(node.getValue());
preOrderTraverse(node.getLeft());
preOrderTraverse(node.getRight());
}
}
//先序遍历(非递归)
public void nrPreOrderTraverse() {
StackNode stack = new StackNode();
Node node = root;
while (node != null || !stack.isEmpty()) {
while (node != null) {
System.out.println(node.getValue());
stack.push(node);
node = node.getLeft();
}
node = stack.pop();
node = node.getRight();
}
}
//后序遍历(递归)
public void postOrderTraverse() {
postOrderTraverse(root);
}
public void postOrderTraverse(Node node) {
if (node != null) {
postOrderTraverse(node.getLeft());
postOrderTraverse(node.getRight());
System.out.println(node.getValue());
}
}
//后续遍历(非递归)
public void nrPostOrderTraverse() {
StackNode stack = new StackNode();
Node node = root;
Node preNode = null;//表示最近一次访问的节点
while (node != null || !stack.isEmpty()) {
while (node != null) {
stack.push(node);
node = node.getLeft();
}
node = stack.peek();
if (node.getRight() == null || node.getRight() == preNode) {
System.out.println(node.getValue());
node = stack.pop();
preNode = node;
node = null;
} else {
node = node.getRight();
}
}
}
//按层次遍历
public void levelTraverse() {
levelTraverse(root);
}
public void levelTraverse(Node node) {
QueueNode queue = new LinkedBlockingQueueNode();
queue.add(node);
while (!queue.isEmpty()) {
Node temp = queue.poll();
if (temp != null) {
System.out.println(temp.getValue());
queue.add(temp.getLeft());
queue.add(temp.getRight());
}
}
}
}
//树的节点
class Node {
private Node left;
private Node right;
private T value;
public Node() {
}
public Node(Node left,Node right,T value) {
this.left = left;
this.right = right;
this.value = https://www.04ip.com/post/value;
}
public Node(T value) {
this(null,null,value);
}
public Node getLeft() {
return left;
}
public void setLeft(Node left) {
this.left = left;
}
public Node getRight() {
return right;
}
public void setRight(Node right) {
this.right = right;
}
public T getValue() {
return value;
}
public void setValue(T value) {
this.value = https://www.04ip.com/post/value;
}
}
测试代码java树的建立代码:
package com.algorithm.tree;
public class TreeTest {
/**
* @param args
*/
public static void main(String[] args) {
Tree tree = new Tree();
tree.buildTree();
System.out.println("中序遍历");
tree.inOrderTraverse();
tree.nrInOrderTraverse();
System.out.println("后续遍历");
//tree.nrPostOrderTraverse();
tree.postOrderTraverse();
tree.nrPostOrderTraverse();
System.out.println("先序遍历");
tree.preOrderTraverse();
tree.nrPreOrderTraverse();
//
}
}
java如何创建一颗二叉树计算机科学中java树的建立代码,二叉树是每个结点最多有两个子树java树的建立代码的有序树 。通常子树的根被称作“左子树”(left subtree)和“右子树”(right subtree) 。二叉树常被用作二叉查找树和二叉堆或是二叉排序树 。
二叉树的每个结点至多只有二棵子树(不存在度大于2的结点),二叉树的子树有左右之分,次序不能颠倒 。二叉树的第i层至多有2的 i -1次方个结点;深度为k的二叉树至多有2^(k) -1个结点;对任何一棵二叉树T,如果其终端结点数(即叶子结点数)为n0,度为2的结点数为n2,则n0 = n21 。
树是由一个或多个结点组成的有限集合,其中:
⒈必有一个特定的称为根(ROOT)的结点;
二叉树
⒉剩下的结点被分成n=0个互不相交的集合T1、T2、......Tn,而且,这些集合的每一个又都是树 。树T1、T2、......Tn被称作根的子树(Subtree) 。
树的递归定义如下:(1)至少有一个结点(称为根)(2)其它是互不相交的子树
1.树的度——也即是宽度 , 简单地说,就是结点的分支数 。以组成该树各结点中最大的度作为该树的度,如上图的树,其度为2;树中度为零的结点称为叶结点或终端结点 。树中度不为零的结点称为分枝结点或非终端结点 。除根结点外的分枝结点统称为内部结点 。
2.树的深度——组成该树各结点的最大层次 。
3.森林——指若干棵互不相交的树的集合,如上图,去掉根结点A , 其原来的二棵子树T1、T2、T3的集合{T1,T2,T3}就为森林;
4.有序树——指树中同层结点从左到右有次序排列 , 它们之间的次序不能互换 , 这样的树称为有序树,否则称为无序树 。
树的表示
树的表示方法有许多,常用的方法是用括号:先将根结点放入一对圆括号中,然后把它的子树由左至右的顺序放入括号中 , 而对子树也采用同样的方法处理;同层子树与它的根结点用圆括号括起来,同层子树之间用逗号隔开,最后用闭括号括起来 。如右图可写成如下形式:
二叉树
(a( b(d,e), c( f(,g(h,i) ),)))
如何在java构造函数中创建一棵树import java.util.Stack;//导入栈包
public class newtree {
private newtree lchild;// 声明数据成员
private newtree rchild;
private char data;
private newtree root;
public newtree(newtree l, newtree r, char data) {// 有参构造函数进行成员赋值
lchild = l;
rchild = r;
this.data = https://www.04ip.com/post/data;
}
public newtree() {// 无参构造函数创建树
newtree f = new newtree(null, null, 'f');
newtree g = new newtree(null, null, 'g');
newtree d = new newtree(null, null, 'd');
newtree e = new newtree(null, null, 'e');
newtree b = new newtree(d, e, 'b');
newtree c = new newtree(f, g, 'c');
newtree a = new newtree(b, c, 'a');
this.root=a;
}
public void visit(newtree p) {/* 输出数据 */
System.out.print(p.data);// 访问结点
}
@SuppressWarnings("unchecked")
public void InOrder() {/* 输入数据 */
newtree p=this.root;//你建了一棵树要把根节点赋值进去啊
Stack s = new Stack();
while (p != null || !s.isEmpty()) /* 处理数据:进行中序遍历 */
{
if (p != null) {
s.push(p);
p = p.lchild;
} else {
p = (newtree) s.pop();
p.visit(p);//this指的是当前的类对象
p = p.rchild;
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
newtree h = new newtree();// 声明变量,变量赋值
h.InOrder();
}
}
//根据你的代码改了一个
import java.util.Stack;//导入栈包
public class newtree {
public Tree createTree() {// 无参构造函数创建树
Tree f = new Tree(null, null, 'f');
Tree g = new Tree(null, null, 'g');
Tree d = new Tree(null, null, 'd');
Tree e = new Tree(null, null, 'e');
Tree b = new Tree(d, e, 'b');
Tree c = new Tree(f, g, 'c');
Tree a = new Tree(b, c, 'a');
return a;
}
public void InOrder(Tree p) {/* 输入数据 */
StackTree s = new StackTree();
while (p != null || !s.isEmpty()) { /* 处理数据:进行中序遍历 */
if (p != null) {
s.push(p);
p = p.lchild;
} else {
p = s.pop();
System.out.print(p.data);
p = p.rchild;
}
}
}
public void inOrder1(Tree p) {
if (p == null)
return;
inOrder1(p.lchild);
System.out.print(p.data);
inOrder1(p.rchild);
}
public static void main(String[] args) {
newtree h = new newtree();// 声明变量,变量赋值
h.InOrder(h.createTree());
System.out.println();
h.inOrder1(h.createTree());
}
}
class Tree {
Tree lchild;// 声明数据成员
Tree rchild;
char data;
Tree(Tree lchild, Tree rchild, char data) {
this.lchild = lchild;
this.rchild = rchild;
this.data = https://www.04ip.com/post/data;
}
}
【java树的建立代码 java 创建树】java树的建立代码的介绍就聊到这里吧,感谢你花时间阅读本站内容,更多关于java 创建树、java树的建立代码的信息别忘了在本站进行查找喔 。

    推荐阅读