java - 创建的类和公共(public)方法未转到测试方法

Question

我创建了一个非常简单的收银机类，并想用单独的方法对其进行测试。当我从测试方法调用类中创建的方法时，会出现错误，指出某个方法在创建它的类中未定义，但事实并非如此。有人可以解释一下为什么我会收到此错误吗？谢谢。

类别:

/**
 * 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

去掉第一个 public class cashRegister { 行和最后一个 }。