java - 将填充的数组传递给公共(public)变量，以便可以在其他类中使用

Question

所以我一直在开发一个已经完成基本布局的 GUI。我已经把所有的逻辑都映射出来了，但是我遇到的问题是弄清楚如何将一个填充的数组设置为一个公共(public)变量，其中所有的字符串和整数都保持不变，而不是让它保持空白。我绝不是编程专家，所以如果答案很明显，请耐心等待。我将发布我试图在公共(public)变量中获取填充数组的窗口。

公共(public)数组'robbieArray'主要工作以从中输出任何值，但过去我不能在框架中使用它。我只想要一个解决方案，以便我可以在我决定制作的框架和其他类中访问它。

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.beans.*;



public class PlayerShow extends JFrame
{

public JFrame playerShowFrame;

public final int CLASSSIZE1 = 2;//subject to change

 //PlayerInput player = new PlayerInput();

public PlayerInput [] robbieArray = new PlayerInput [CLASSSIZE1];



public void main(String[] args) throws IOException, FileNotFoundException
{
  //    PlayerInput player = new PlayerInput();
Scanner inputRobbieChamps = new Scanner (new FileReader("robbie_mccarthy_champs.txt"));

for (int x = 0; x<CLASSSIZE1;x++)
{
    String champName = inputRobbieChamps.next();
    String role = inputRobbieChamps.next();
    int tier = inputRobbieChamps.nextInt();

    robbieArray[x] = new PlayerInput (champName, role, tier);
System.out.println("The champ name is " + robbieArray[x].getChampName() +     "with a role of " + robbieArray[x].getRole() + " and a tier value of " + robbieArray[x].getTier());   
}
//  PlayerInput [] robbieArray = new PlayerInput[CLASSSIZE1]; 



/*  for (int x = 0; x<CLASSSIZE1; x++)
    {
        robbieArray [x] = new PlayerInput();
    }

    for (int x = 0; x<CLASSSIZE1; x++)
    {
        robbieArray[x].setChampName(inputRobbieChamps.next());
        robbieArray[x].setRole(inputRobbieChamps.next());
        robbieArray[x].setTier(inputRobbieChamps.nextInt());
    }*/
    inputRobbieChamps.close();


}


public PlayerShow ()
{
    frame();
    playerShowFrame.setVisible(false);
}

public void frame()
{
    playerShowFrame = new JFrame();
    playerShowFrame.setVisible(true);
    //playerShowFrame.setSize(900,600);
    playerShowFrame.setDefaultCloseOperation(EXIT_ON_CLOSE);
    getPlayerShowFrame().setBounds(100, 300, 900, 600);
    playerShowFrame.setLayout(new GridLayout(5,8));

    JLabel titleL = new JLabel ("Robbie McCarthy's data:", SwingConstants.CENTER);

    JLabel blank1L = new JLabel (" ", SwingConstants.CENTER);

    JLabel blank2L = new JLabel (" ", SwingConstants.CENTER);

    JLabel champNameL = new JLabel("Champion Name", SwingConstants.CENTER);

    JLabel roleL = new JLabel ("Role", SwingConstants.CENTER);

    JLabel tierL = new JLabel ("Tier", SwingConstants.CENTER);

    JTextArea hugeTF = new JTextArea ();

    hugeTF.setColumns(6);
    hugeTF.setRows(3);

//      for (int x = 0; x<CLASSSIZE1; x++)
//      {
    System.out.println(robbieArray[0].getRole()); // This is where I am checking to see if i get a filled public array

//      }

    hugeTF.setEditable(false);  

    playerShowFrame = getPlayerShowFrame();

    playerShowFrame.add(titleL);

    playerShowFrame.add(blank1L);

    playerShowFrame.add(blank2L);

    playerShowFrame.add(champNameL);

    playerShowFrame.add(roleL);

    playerShowFrame.add(tierL);

    playerShowFrame.add(hugeTF);

}




public JFrame getPlayerShowFrame() {
    return playerShowFrame;
}

public void setPlayerShowFrame(JFrame playerShowFrame) {
        this.playerShowFrame = playerShowFrame;
}
}

Answer 1

将数组设为私有(private)静态 .. 为了封装 OOP，创建一个静态 getter

private static PlayerInput [] robbieArray = new PlayerInput [CLASSSIZE1];

public static PlayerInput [] getRobbieArray(){
return robbieArray;
}

然后您可以通过 PlayerShow.getRobbieArray() 访问它