为什么我的方法被认为是非静态的并且会出错

Question

我在智慧结束。我不明白我需要做什么才能使代码工作。我知道main（）是静态的。但是什么使我的方法非静态。

package ch5Hw;

import java.util.Scanner;
public class EventDemo {

    int eventId;
    int numOfguests;

    Event largeWedding= new Event( eventId, numOfguests);
    Event smallFamReunion= new Event(eventId, numOfguests);
    Event hugeFestival=new Event (eventId, numOfguests);

    Scanner keyboard= new Scanner(System.in);


    public static void main(String[] args) {
        partySize();//ERROR HERE..Cannot make a static reference to the non-static method partySize() from the type EventDemo

    }

    public void partySize() {
        System.out.println("Please enter an identification integer for Wedding");
        eventId = keyboard.nextInt();

        System.out.println("Please enter the number of guests for your Family Reunion");
        numOfguests = keyboard.nextInt();

        if (numOfguests < Event.CUTOFF_NUMBER) {
            smallFamReunion.setEventNumber(eventId);
            smallFamReunion.setNumberOfGuests(numOfguests);
        }

        else if (numOfguests >= Event.CUTOFF_NUMBER && eventId < 100) {
            largeWedding.setEventNumber(eventId);
            largeWedding.setNumberOfGuests(numOfguests);
        }

        else {
            hugeFestival.setEventNumber(eventId);
            hugeFestival.setNumberOfGuests(numOfguests);
        }
    }
}

Answer 1

制作方法static。

public static void partySize()

或者像这样称呼它 - new EventDemo().partySize()

Answer 2

将partySize();替换为new EventDemo().partySize();，因为只有您的类实例可以调用此方法。