我正在为一个项目做老虎机。我无法让我的 JButton
从我的 ArrayList
生成新的随机数。我可以在程序启动时随机化数字并设置 actionlistener
,但它无法满足我的需要。它仅用于测试目的。
我的 Actionlistener
在不同的 Java 文件中。一切正常,我只是不知道如何在按钮按下时在 plc1
、plc2
和 plc3
的占位符中生成新的随机数点击。
我最近才真正开始编写代码,大约 3 周前。 请不要讨厌,这是我的第一个项目。
package GGCGuiLotto;
import java.util.ArrayList;
import java.awt.Color;
import java.awt.Image;
import java.awt.BorderLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.JOptionPane;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextField;
import java.util.Random;
public class GGCGuiLotto {
public static void main(String[] args) {
//Arraylist of images
ImageIcon pic0 = new ImageIcon("pics/pic1.png");
ImageIcon pic1 = new ImageIcon("pics/pic2.png");
ImageIcon pic2 = new ImageIcon("pics/pic3.png");
ImageIcon pic3 = new ImageIcon("pics/pic4.png");
ImageIcon pic4 = new ImageIcon("pics/pic5.png");
ImageIcon pic5 = new ImageIcon("pics/pic6.png");
ImageIcon pic6 = new ImageIcon("pics/pic7.png");
final ArrayList<ImageIcon> slotlist = new ArrayList<ImageIcon>();
slotlist.add(pic0);
slotlist.add(pic1);
slotlist.add(pic2);
slotlist.add(pic3);
slotlist.add(pic4);
slotlist.add(pic5);
slotlist.add(pic6);
Random ran = new Random();
int plc1 = ran.nextInt(4);
int plc2 = ran.nextInt(4);
int plc3 = ran.nextInt(4);
//generates the frame and the labels are added.
JFrame frame = new JFrame();
frame.setSize (400,275);
frame.setTitle("GGC Lotto Slots Rcorbin");
frame.setResizable(false);
frame.setVisible(true);
JPanel pnlReels = new JPanel();
frame.add(pnlReels);
JPanel aReel1 = new JPanel();
aReel1.setBackground(new Color(25,25,112));
aReel1.setBounds(15,10,100,100);
JPanel bReel2 = new JPanel();
bReel2.setBackground(new Color(25,25,112));
bReel2.setBounds(145,10,100,100);
JPanel cReel3 = new JPanel();
cReel3.setBackground(new Color(25,25,112));
cReel3.setBounds(275,10,100,100);
pnlReels.add(aReel1);
pnlReels.add(bReel2);
pnlReels.add(cReel3);
JLabel aReel1lbl = new JLabel();
JLabel bReel2lbl = new JLabel();
JLabel cReel3lbl = new JLabel();
aReel1.add(aReel1lbl);
bReel2.add(bReel2lbl);
cReel3.add(cReel3lbl);
aReel1lbl.setIcon(slotlist.get(plc1));
bReel2lbl.setIcon(slotlist.get(plc2));
cReel3lbl.setIcon(slotlist.get(plc3));
//jbutton
JButton slotbtn1 = new JButton();
slotbtn1.setText("GGC LOTTO Click ME");
pnlReels.add(slotbtn1);
slotbtn1.setBounds(145,50,100,75);
//FirstGuiListener act = new FirstGuiListener();
//slotbtn1.addActionListener((ActionListener) act);
GenPLCListener genPLC = new GenPLCListener();
slotbtn1.addActionListener((genPLC));
{}
if (plc1 == plc2 && plc1 == plc3 && plc2 == plc3)
{
JOptionPane.showConfirmDialog(null,"Winner! Play Again? ","GGC Lotto Slots RCorbin ",JOptionPane.YES_NO_OPTION);
//System.out.println("Winner");
}
else
{
//JOptionPane.showMessageDialog(null,"No Winner Winner Chicken Dinner ! ");
System.out.println("Crazy"); }
}
}
package GGCGuiLotto;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.JOptionPane;
class GenPLCListener extends GGCGuiLotto implements ActionListener{
public void actionPerformed(ActionEvent event){
System.out.println("Works");
JOptionPane.showConfirmDialog(null,"Choose Wisely. ","Click If you Trust!",JOptionPane.YES_NO_OPTION);
}
}
最佳答案
尝试扩展 GGCGuiLotto
不会做您认为应该做的事情,也就是让您访问相同 实例变量。所以摆脱它。相反,您可以按引用传递,GGCGuiLotto
的当前实例给您的监听器。并有一些 getter 和 setter 来从 GGCGuiLotto
类访问您需要的变量。我的意思可能是这样的(不完全确定你想要完成什么,所以这只是一个例子)。
public class GenPLCListener implements ActionListener {
private GGCGuiLotto lotto;
public GenPLCListener(GGCGuiLotto lotto) {
this.lotto = lotto;
}
@Override
public void actionPerfomred(ActionEvent e) {
List<ImageIcon> slotList = lotto.getSlotList();
Collections.shuffle(slotList); // shuffle the list
// do something else if need be.
}
}
当您创建监听器时,将 this
传递给它。 this
是 GGCGuiLotto
一些旁注
Swing 程序不像控制台程序。您不想在
main
方法中执行所有操作。对于初学者,您可以将main
方法中的代码放入构造函数中。然后在main
方法中创建一个GGCGuiLotto
的实例。Swing 应用程序应该在事件调度线程上运行。参见 Initial Threads
编辑
对于您的问题,也许更合适的解决方案是使用 pullSlot
方法创建一个 interface
,您可以在 GGCGuiLotto
类中覆盖该方法只需将 interface
传递给监听器并在 actionPerformed
中调用 pullSlot
方法。像这样
public interface PullInterface {
public void pullSlot();
}
public class GGCGuiLotto implements PullInterface {
ArrayList<ImageIcon> slotList = new ArrayList<>(); // global scope.
JLabel aReel1lbl = new JLabel();
JLabel bReel2lbl = new JLabel();
JLabel cReel3lbl = new JLabel();
Random rand = new Random();
public GGCGuiLotto() {
GenPLCListener listener = new GenPLCListener(this);
}
@Override
public void pullSlot() {
// do what you need to do here to implement a pulling of the lever
int r1 = rand.nextInt(slotList.size());
int r2 = rand.nextInt(slotList.size());
int r3 = rand.nextInt(slotList.size());
reel1lbl.setIcon(slotList.get(r1));
}
}
public class GenPLCListener implement ActionListener {
private PullInterface pull;
public GenPLCListener(PullInterface pull) {
this.pull = pull;
}
@Override
public void actionPerformed(ActionEvent e) {
pull.pullSlot();
}
}
关于java - 我的 JButton 的 ActionListener 如何访问另一个类中的变量?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22205821/