java - 当该程序显示无法找到或加载主类时，如何使该程序运行？

Question

我对 Java 很陌生，我不断收到此错误，但我无法弄清楚。

Error: Could not find or load main class restaurantclient.RestaurantClient Java Result: 1

这是在 Netbeans 上进行的，我确信我所做的一切都是正确的。这是我的 Java 类(class)作业，我非常感谢您的帮助。我已经研究这个问题好几天了。

import java.text.DecimalFormat;

public class RestaurantClient {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Restaurant r1;
        Restaurant r2;
        r1 = new Restaurant("PizzaHut", 152, (float) 4.95); //instantiating
        r2 = new Restaurant("Dominos", 10, (float) 3.657);
        System.out.print(r1.toString());
        System.out.print(r2.toString());
        r2.setPeopleServed(r1.getPeopleServed());
        r2.setAveragePrice(r1.getAverageMeal());
        if (r1.equals(r2)) //checking if equal
            System.out.println("\nThe two objects are the same");
        else
            System.out.println("\nThe two objects are NOT the same");
        r2.setName(r1.getName());
        if (r1.equals(r2)) //checking if equal
            System.out.println("\nThe two objects are the same");
        else
            System.out.println("\nThe two objects are NOT the same");
        DecimalFormat pricePattern = new DecimalFormat("$###,###,000.00");
        System.out.println("Tax paid per year: " + pricePattern.format(r1.averageTaxes()));

    }

}

//Restaurant.java

public class Restaurant extends Store {
    private int peopleServed;
    private float avgmeal;

    public Restaurant(String newName, int peopleServed, float avgmeal) {
        super(newName);
        setPeopleServed(peopleServed);
        setAveragePrice(avgmeal);
    }
    public void setPeopleServed(int newpeopleServed) {
        if (newpeopleServed >= 0)
            peopleServed = newpeopleServed; //mutator alows client to change the value of name
        else
            System.out.println("Number has to be greater than zero");
    }
    public void setAveragePrice(float newprice) {
        if (newprice >= 0)
            avgmeal = newprice; //mutator alows client to change the value of name
        else
            System.out.println("Number has to be greater than zero");
    }
    public int getPeopleServed() {
        return peopleServed; //accessor; returns current value
    }
    public float getAverageMeal() {
        return avgmeal; //accessor; returns current value
    }
    public String toString() {
        return "Name of store is:   " + super.getName() +
            "\nNumber of people served is   " + peopleServed +
            "\nAverage price per person is " + avgmeal + "\n";
    }

    public boolean equals(Object o) {
        if (!(o instanceof Restaurant))
            return false;
        else {
            Restaurant objRest = (Restaurant) o;
            if (avgmeal == objRest.avgmeal && peopleServed == objRest.peopleServed && super.equals(objRest))
                return true;
            else
                return false;

        }

    }
    public double averageTaxes() {
        double avgtaxes = (double)(super.taxrate * (peopleServed * avgmeal * 365));
        return avgtaxes; //accessor; returns current value
    }

}

//Store.java

public class Store {
    private String storename;
    public final float taxrate = (float) .08000;

    public Store(String newName) //constructor
    {
        setName(newName);
    }

    public String getName() {
        return storename; //accessor; returns current value
    }
    public void setName(String newName) {
        storename = newName; //mutator alows client to change the value of name
    }
    public String toString() {
        return "Name of store is:   " + storename;
    }
    public boolean equals(Object o) {
        if (!(o instanceof Store))
            return false;
        else {
            Store objStore = (Store) o;
            if (storename.equals(objStore.storename))
                return true;
            else
                return false;
        }
    }
}

Answer 1

系统正在寻找主类restaurantclient.RestaurantClient，因此类RestaurantClient位于包restaurantClient中，但是您的类 RestaurantClient 似乎在默认包中。