创建的类和公共方法无法通过测试方法

Question

我创建了一个非常简单的收银机类，并希望以单独的方法对其进行测试。当我从测试方法中调用在类中创建的方法时，有一个错误说明某个方法在它创建的类中是未定义的，但事实并非如此。有人可以解释为什么我得到这个错误？谢谢。

类：

/** 
* A simulated cash register that tracks the item count and 3 the total 
* amount due. 
*/ 
public class CashRegister { 
    private int itemCount; 
    private double totalPrice; 


    public CashRegister() { 
     itemCount = 0; 
     totalPrice = 0; 
    } 


    public void addItem(double price) { 
     itemCount++; 
     totalPrice = totalPrice + price; 
    } 

    public double getTotal() { 
     return totalPrice; 
    } 


    public int getCount() { 
     return itemCount; 
    } 

    public void clear() { 
     itemCount = 0; 
     totalPrice = 0; 
    } 
} 

测试的类：

public class cashRegisterTester { 

    public static void main(String[] args) { 

     cashRegister register1 = new cashRegister(); 

     register1.addItem(0.95); 
     register1.addItem(2.50); 
     System.out.println(register1.getCount()); 
     System.out.println("Expected: 3"); 
     System.out.printf("%.2f\n", register1.getTotal()); 
     System.out.println("Expected: 5.40"); 

    } 

} 

Answer 1

你有类类中：

public class cashRegister { /** * A simulated cash register that tracks the item count and 3 the total * amount due. */ 
    public class CashRegister 

只删除public class CashRegister，它应该为你工作。

Answer 2

摆脱第一public class cashRegister {线和最终}的。