中序表达式求值问题，请大家分析分析，结果不正确~~~

Question

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;public class Stack
{
    public static void main(String args[])
    {
        StackArray Operator=new StackArray();
        StackArray Operand=new StackArray();
        String Expression=new String();
        int Position=0;
        int Operator1;
        int Operand1=0;
        int Operand2=0;
        int Evaluate=0;
        
         //(Operator.AStack[Operator.Top])        System.out.print("Please input your inorder expression:");
        ConsoleReader console=new ConsoleReader(System.in);
        Expression=console.readLine();
        
       
        while(true)
        {
            if(Operator.IsOperator((int)Expression.charAt(Position)))
            {
                if(Operator.Top!=-1)
                {
      if(Operator.Prioraty((int) Expression.charAt(Position))<=Operator.Prioraty(Operator.AStack[Operator.Top]))
                                    {
                        Operand1=Operand.Pop();
                        Operand2=Operand.Pop();
                        Operator1=Operator.Pop();
                        Operand.Push(Operator.TwoResult(Operator1,Operand1,Operand2)); 
                        
                    }
                  }
                
                    Operator.Push((int)Expression.charAt(Position));
                    
               }
             else
               {    
                  Operand.Push((int)(Expression.charAt(Position)-48));
                 
               }
             Position++;
             if(Position>=Expression.length())
                 break;
           }        while(Operator.Top!=-1)
        {    
             Operand1=Operand.Pop();
             Operand2=Operand.Pop();
             Operator1=Operator.Pop();
             Operand.Push(Operand.TwoResult(Operator1,Operator1,Operand2));
             Evaluate=Operand.Pop();
             System.out.print("The expression ["+Expression+"]");
             System.out.print("result is "+Evaluate);
         }
     }
}   
class StackArray
{
    int MaxSize=20;
    int[] AStack=new int[MaxSize];
    int Top=-1;
    public void Push(int Value)
    {
       
        if(Top>=MaxSize)
           System.out.println("The stack is full!!");
        else
           {
               Top++;
               AStack[Top]=Value;
               
            }
     }    public int Pop()
    {
       int Temp;
       int i;       if(Top<0)
       {
           System.out.println("The stack is empty!"+"你的问题!");
           //System.out.println("你的问题!");
           return -1;
            
       }
       Temp=AStack[Top];
       Top--;
       return Temp;
    }    public int Prioraty(int Operator)
    {
       if(Operator==43||Operator==45)
           return 1;
       else if(Operator==42||Operator==47)
           return 2;
       else
           return 0;
    }    public boolean IsOperator(int Operator)    {
        if(Operator==43||Operator==45||Operator==42||Operator==47)
        return true;
        else
        return false;
     }   
    public int TwoResult(int operator,int operand1,int operand2)
    {
        switch(operator)
        {
            case 43:
                 return(operand2+operand1);
            case 45:
                 return(operand2-operand1);
            case 42:
                 return(operand2*operand1);
            case 47:
                 return(operand2/operand1);
          }
          return 0;
      }
}
 class ConsoleReader
{     public ConsoleReader(InputStream inStream)
   {  reader = new BufferedReader
         (new InputStreamReader(inStream)); 
   }
   
      public int readInt() 
   {  String inputString = readLine();
      int n = Integer.parseInt(inputString);
      return n;
   }
   
      public double readDouble() 
   {  String inputString = readLine();
      double x = Double.parseDouble(inputString);
      return x;
   }
   
      public String readLine() 
   {  String inputLine = "";      try
      {  inputLine = reader.readLine();
      }
      catch(IOException e)
      {  System.out.println(e);
         System.exit(1);
      }      return inputLine;
   }   private BufferedReader reader; 
}