急求java实现二叉树遍历程序 多少分都行 啊

在JAVA中实现二叉树，程序如下（转载）

//********************************************************************
//filename: BinaryTreeTest.java
//purpose: test a binarytree with java
//date: 2002/12/18
//author: flyfan
//ver: 0.1
//********************************************************************

public class BinaryTreeTest
{
public static void main(String args[])
{
BinaryTreeTest b=new BinaryTreeTest();
int data[]={12,11,34,45,67,89,56,43,22,98};
BinaryTree root =new BinaryTree(data[0]);

System.out.print("二叉树的中的数据： ");
for(int i=1;i{
root.insertTree(root,data[i]);
System.out.print(data[i-1]+";");
}

System.out.println(data[data.length-1]);

int key=Integer.parseInt(args[0]);

if(b.searchkey(root,key))
{
System.out.println("找到了:"+key);
}
else
{
System.out.println("没有找到："+key);
}
}

public boolean searchkey(BinaryTree root, int key)
{
boolean bl=false;
if(root==null)
{
bl=false;
return bl;
}
else if(root.data==key)
{
bl=true;
return bl;
}
else if(key>=root.data)
{
return searchkey(root.rightpoiter,key);
}
return searchkey(root.leftpoiter,key);
}
}

class BinaryTree
{
int data;
BinaryTree leftpoiter;
BinaryTree rightpoiter;

BinaryTree(int data)
{
this.data=data;
leftpoiter=null;
rightpoiter=null;
}

public void insertTree(BinaryTree root, int data)
{
if(data>=root.data)
{
if(root.rightpoiter==null)
{
root.rightpoiter=new BinaryTree(data);
}
else
{
insertTree(root.rightpoiter,data);
}
}
else
{
if(root.leftpoiter==null)
{
root.leftpoiter=new BinaryTree(data);
}
else
{
insertTree(root.leftpoiter,data);
}
}
}
}
//end