Java 试图在我的程序中显示一棵树

你能告诉我怎么了吗？基本上，我试图显示存储在变量“oneTree”中的用户输入，并在屏幕上发布，这样当我编写它时，它会显示一棵树的价格

import java.util.Scanner;
import java.text.DecimalFormat;

public class greenfields
{
  public static void main(String[] args)
 {

  Scanner keyboard = new Scanner(System.in);

 String choice;
 int forDelivery;
 int numTrees;
 int treeHeight;
 double oneTree;
 double treeCost;
 double deliveryCost;
 double totalCharges;
 double totalTreeCost;



 System.out.println("How many trees do you want to purchase?");
 numTrees = keyboard.nextInt();
 System.out.println("Enter the height of the trees you want to purchase.");
 treeHeight= keyboard.nextInt();


 System.out.println("Would you like the trees be delivered?  Enter 1 for Yes, Enter 0 for No.");
  forDelivery= keyboard.nextInt();
  if(forDelivery==1)



    if(numTrees <5 )
   deliveryCost = 10.00 * numTrees;

   else if (numTrees >=5)
   forDelivery=50;

if(treeHeight <= 5);
    treeCost =numTrees * 69.50;
if (treeHeight <= 8);
    treeCost =numTrees * 99.00;
if (treeHeight >=9);
    treeCost= numTrees * 199.50;
 if(treeHeight <3)
 treeCost= numTrees * 39.00;

  if(treeHeight < 3)
    oneTree = 39.00;
  if(treeHeight == 3 || treeHeight == 4 ||treeHeight== 5)
    oneTree=  69.50;
  if (treeHeight == 6  || treeHeight== 7 || treeHeight == 8)
   oneTree = 99.00;
  if ( treeHeight > 8)
   oneTree =199.50;

   totalTreeCost = numTrees * treeCost;

   System.out.println(numTrees + " Trees at "+ " each:" +treeCost+ "\n" + totalTreeCost);

    }
    }

import java.util.Scanner；
导入java.text.DecimalFormat；
公共级绿地
{
公共静态void main（字符串[]args）
{
扫描仪键盘=新扫描仪（System.in）；
字符串选择；
int forDelivery；
整数树；
int树高；
双一树；
双树冠；
双重配送成本；
双重总费用；
双倍全树成本；
System.out.println（“您想购买多少棵树？”）；
numTrees=keyboard.nextInt（）；
System.out.println（“输入您想要购买的树的高度”）；
treeHeight=keyboard.nextInt（）；
System.out.println（“是否希望交付树？输入1表示是，输入0表示否”）；
forDelivery=keyboard.nextInt（）；
如果（forDelivery==1）
如果（numTrees=5）
forDelivery=50；
if（treeHeight首先，在if条件之后删除；，if条件当前不起任何作用

 if (treeHeight <= 5) ;
    treeCost = numTrees * 69.50;
    if (treeHeight <= 8) ;
    treeCost = numTrees * 99.00;
    if (treeHeight >= 9) ;
    treeCost = numTrees * 199.50;
    if (treeHeight < 3)
        treeCost = numTrees * 39.00;

if（treehight到底出了什么问题？有错误吗？预期输出与实际输出？
System.out.println（numTrees+“Trees at”+“+treeCost+”\n”+totalTreeCost）；
…我觉得这也有问题。嗯，一个示例输出是-5棵树：347.5 1737.5，对我来说很好：）实际上应该是5棵树，每棵347.5棵：1737棵。5@Alexander哦，你是说语法？我只考虑数据是否打印正确。@Alexander，这很公平
 if (treeHeight <= 5)
        treeCost = numTrees * 69.50;
    else if (treeHeight <= 8)
        treeCost = numTrees * 99.00;
    else if (treeHeight >= 9)
        treeCost = numTrees * 199.50;
    else if (treeHeight < 3)
        treeCost = numTrees * 39.00;