我正在开发BlackJack游戏，显然，我需要一个按键和支架按钮。我在main方法的hit和stand按钮中添加了actionListener。但是，当单击立场按钮时，我无法弄清楚如何取消旧按钮actionListener。这意味着即使您点击“Stand”，点击按钮仍然有效，反之亦然。
以下是代码：
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Jblackjack {
// Creating static variables
static JButton card1 = new JButton(" ");
static JButton card2 = new JButton(" ");
static JButton card3 = new JButton(" ");
static JButton card4 = new JButton(" ");
static JButton compcard1 = new JButton(" ");
static JButton compcard2 =new JButton(" ");
static JButton compcard3 = new JButton(" ");
static JFrame frame = new JFrame("BlackJack");
static JButton no = new JButton("Cancel");
static JButton button = new JButton("Let's go!");
static JButton hit = new JButton("hit");
static JButton stand = new JButton("Stand");
static JLabel comptext = new JLabel("The computer has:");
static JLabel text = new JLabel("We are going to play Blackjack.");
static JLabel text2 = new JLabel("This Blackjack does not have any splits, doubles, surrenders, or insurance. Just hits and stands.");
static JLabel text3 = new JLabel("This is a WIP");
static JLabel text4 = new JLabel("11's are Jacks. 12's are Queens. 13's are Kings. 1's are Ones for now.");
static JLabel text5 = new JLabel("Are you ready?");
static class Cancel implements ActionListener{
public void actionPerformed (ActionEvent e){
System.exit(0);
}
}
static class Play implements ActionListener{
public void actionPerformed (ActionEvent e){
text.setText("You have:");
text2.setVisible(false);
text3.setVisible(false);
text4.setVisible(false);
text5.setVisible(false);
no.setVisible(false);
button.setVisible(false);
frame.add(hit);
frame.add(stand);
frame.add(card1);
text.setText("You have:");
int a = 1 + (int)(Math.random()*4);
int b = (int)(Math.random()*13);
if(a==1){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card1.setText(b + "Clubs");
} else if (a==2){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card1.setText(b + "Spades");
} else if(a==3){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card1.setText(b + "Hearts");
} else if(a==4){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card1.setText(b + "Diamonds");
}
frame.add(card2);
int c = 1 + (int)(Math.random()*4);
int d = (int)(Math.random()*13);
if(c==1){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card2.setText(d + "Clubs");
} else if(c==2){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card2.setText(d + "Spades");
} else if(c==3){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card2.setText(d + "Hearts");
} else if(c==4){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card2.setText(d + "Diamonds");
}
frame.add(comptext);
comptext.setBounds(10, 350, 200, 50);
frame.add(compcard1);
int i = 1 + (int)(Math.random()*4);
int f = (int)(Math.random()*13);
if(i==1){
if((f==11) || (f==12) || (f==13)){
f = 10;
}
compcard1.setText(f + "Clubs");
} else if (i==2){
if((f==11) || (f==12) || (f==13)){
f = 10;
}
compcard1.setText(f + "Spades");
} else if(i==3){
if((f==11) || (f==12) || (f==13)){
f = 10;
}
compcard1.setText(f + "Hearts");
} else if(i==4){
if((f==11) || (f==12) || (f==13)){
f = 10;
}
compcard1.setText(f + "Diamonds");
}
frame.add(compcard2);
int g = 1 + (int)(Math.random()*4);
int h = (int)(Math.random()*13);
if(g==1){
if((h==11) || (h==12) || (h==13)){
h = 10;
}
compcard2.setText(h + "Clubs");
} else if(g==2){
if((h==11) || (h==12) || (h==13)){
h = 10;
}
compcard2.setText(h + "Spades");
} else if(g==3){
if((h==11) || (h==12) || (h==13)){
h = 10;
}
compcard2.setText(h + "Hearts");
} else if(g==4){
if((h==11) || (h==12) || (h==13)){
h = 10;
}
compcard2.setText(h + "Diamonds");
}
frame.revalidate();
frame.repaint();
}
}
static class Hit implements ActionListener{
public void actionPerformed (ActionEvent e){
hit.removeActionListener(this);
hit.addActionListener(new Hit2());
frame.add(card3);
int a = 1 + (int)(Math.random()*4);
int b = (int)(Math.random()*13);
if(a==1){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card3.setText(b + "Clubs");
} else if (a==2){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card3.setText(b + "Spades");
} else if(a==3){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card3.setText(b + "Hearts");
} else if(a==4){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
card3.setText(b + "Diamonds");
}
frame.revalidate();
frame.repaint();
}
}
static class Hit2 implements ActionListener{
public void actionPerformed (ActionEvent e){
hit.removeActionListener(this);
hit.addActionListener(new Hit3());
frame.add(card4);
int c = 1 + (int)(Math.random()*4);
int d = (int)(Math.random()*13);
if(c==1){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card4.setText(d + "Clubs");
} else if(c==2){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card4.setText(d + "Spades");
} else if(c==3){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card4.setText(d + "Hearts");
} else if(c==4){
if((d==11) || (d==12) || (d==13)){
d = 10;
}
card4.setText(d + "Diamonds");
}
frame.revalidate();
frame.repaint();
}
}
static class Hit3 implements ActionListener{
public void actionPerformed (ActionEvent e){
}
}
static class Stand implements ActionListener{
public void actionPerformed (ActionEvent e){
frame.add(compcard3);
int a = 1 + (int)(Math.random()*4);
int b = (int)(Math.random()*13);
if(a==1){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
compcard3.setText(b + "Clubs");
} else if (a==2){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
compcard3.setText(b + "Spades");
} else if(a==3){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
compcard3.setText(b + "Hearts");
} else if(a==4){
if((b==11) || (b==12) || (b==13)){
b = 10;
}
compcard3.setText(b + "Diamonds");
}
}
}
static class Stand2 implements ActionListener{
public void actionPerformed (ActionEvent e){
}
}
static class Stand3 implements ActionListener{
public void actionPerformed (ActionEvent e){
}
}
public static void main(String[] args){
//JFrame properties
frame.setLayout(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
// Creating "JVariables"
JLabel background = new JLabel(new ImageIcon("BlackJackBackGround.png"));
// Adding JVariables and setting bounds
card1.setBounds(20, 50, 110, 150);
card2.setBounds(140, 50, 110, 150);
card3.setBounds(260, 50, 110, 150);
card4.setBounds(380, 50, 110, 150);
hit.setBounds(20, 300, 100, 50);
hit.addActionListener(new Hit());
stand.setBounds(130, 300, 100, 50);
stand.addActionListener(new Stand());
compcard1.setBounds(20, 400, 110, 150);
compcard2.setBounds(140, 400, 110, 150);
compcard3.setBounds(260, 400, 110, 150);
frame.add(background);
frame.add(text);
text.setBounds(5, 0, 250, 50);
frame.add(text2);
text2.setBounds(5, 25, 550, 50);
frame.add(text3);
text3.setBounds(5, 50, 150, 50);
frame.add(text4);
text4.setBounds(5, 75, 550, 50);
frame.add(text5);
text5.setBounds(5, 100, 150, 50);
frame.add(no);
no.setBounds(10, 150, 150, 50);
no.addActionListener(new Cancel());
frame.add(button);
button.setBounds(170, 150, 150, 50);
button.addActionListener(new Play());
frame.setSize(1000, 700);
}
}