TreeSort Error, "Cannot find Symbol"

I have this program that I am working on that I am trying to insert user entered integers till a "-1" is detected and it will stop inserting the integers into the Tree and print it out inOrder.

I am geting 2 errors:

File: S:\makeup1.java [line: 9]
Error: S:\makeup1.java:9: cannot find symbol
symbol : class Tree
location: class makeup1

File: S:\makeup1.java [line: 9]
Error: S:\makeup1.java:9: cannot find symbol
symbol : class Tree
location: class makeup1

Code:

---

import java.util.Scanner;
import java.io.*;

public class makeup1{
 
    public static void main(String [] args){
   
    int n;
    Tree t = new Tree();
    Scanner scanner = new Scanner(System.in);
   
    while(n!=-1){
      System.out.println("input integer into tree: ");
      n = scanner.nextInt();
      insert(t,n);
    }
 
  }
  public static class tree{
    public int value;
    public tree right;
    public tree left;
    public tree(int V, tree L, tree R){
      {
        value = V;
        left = L;
        right = R;
      }
    }
  }
 
  public static tree insert(tree t, int i){
    if(t==null){
      return null;
    }
    if(t.left!=null){
      insert(t.left, i);
    }
    else if(t.right!=null){
      insert(t.right, i);
    }
  }
  public static tree treesort(tree t){
    if(t==null){
      return null;
    }
    if(!(t.left==null)){
      return t.left;
    }
    return t.right;
  }

}

---

Can anyone help me out?

Capitalization matters in Java