无法将数组传递给另一个类

Question

我一直在通过向我制作的一个程序中添加一个使GUI成为类的类来练习挥杆。 我目前无法将数组发送到Visual类。

我现在要完成的操作是让按钮上的actionlistener运行并将标签更改为EightBall类中数组的随机元素的输出。

我的问题在于我不知道如何将数组和随机对象发送给它。

如何将信息传递给actionPerformed方法，以便可以从print方法访问Answers和rnd ？

import java.util.Scanner;
import java.util.Random;

public class EightBall {    
  public void print() {
 Scanner Scan = new Scanner(System.in);
 System.out.print("What is your question?");
 String question = Scan.next(); 

String [] Answers;
Answers = new String [8];
Answers[0] = "Unlikely";
Answers[1] = "Positive";
Answers[2] = "Yes";
Answers[3] = "No";
Answers[4] = "Ask Again Later";
Answers[5] = "Maybe";
Answers[6] = "ugh";
Answers[7] = "blag";
int rnd = new Random().nextInt(Answers.length); }

}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing. *;
 public  class Visual extends EightBall implements ActionListener {
 JTextField textField;
JButton button;
 JLabel label;
 public static void main(String[]args) {
    Visual vis = new Visual();
    vis.go();
}   
        public void go(){

            EightBall ball = new EightBall();
            label = new JLabel("Whate is you question?");
        JFrame frame = new JFrame();
        button = new JButton("Ask");
        textField = new JTextField(20);
        JPanel panel = new JPanel();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    panel.add(label);
    panel.add(textField);
    panel.add(button);
    frame.add(panel);
    frame.setVisible(true);
    frame.setTitle("Magic Eight Ball");
    frame.setSize(1000,1000);
    button.addActionListener(this);
        }

    public void actionPerformed(ActionEvent event) {
        EightBall eight = new EightBall();
        eight.print();
        label.setText();
}
    }

Answer 1

在EightBall类中更改print()方法以返回一个String以便您可以在其他类中使用相关数据。 像这样：

public String print(){
    //your code
    return Answers[rnd];
}

这样，您可以在actionPerformed(ActionEvent)方法中访问它。 像这样：

public void actionPerformed(ActionEvent event) {;
    label.setText(new EightBall().print());
}

PS Java约定是camelCase用于字段/局部变量（ Answers应该是answers ， Scan应该是scan ）