我为 while 循环创建了一个布尔值以使其在布尔值等于 true
时运行,我想让播放按钮使 boolean = true
触发 while 循环并运行游戏。但这由于某种原因不起作用。
有人可以帮忙制作boolean gameRunning = true;
吗?我只是不知道如何将其值从 false
更改为 true
。
我尝试使用 atomic booleans
但没有用
package panda.org;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.lang.Math;
import java.util.concurrent.atomic.AtomicBoolean;
public class NumberGame implements ActionListener{
JFrame frame;
JLabel rules;
JLabel rulesText;
JLabel rulesText2;
JButton play;
JButton exit;
Font myFont = new Font("Serif Plain", Font.BOLD, 15);
NumberGame() {
frame = new JFrame("NumberGame");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(600, 500);
frame.setLocationRelativeTo(null);
frame.setLayout(null);
frame.setResizable(true);
Image icon = Toolkit.getDefaultToolkit().getImage("C:\\Users\\Gaming MSI\\Pictures\\Saved Pictures\\download (1).png");
frame.setIconImage(icon);
rules = new JLabel("Rules: ");
rules.setFont(myFont);
rules.setBounds(50, 100, 100, 75);
rulesText = new JLabel("We will pick a random number in the range of 1 -> 50.");
rulesText.setBounds(100, 100, 315, 75);
rulesText2 = new JLabel("Your job is to guess that number!");
rulesText2.setBounds(100, 120, 315, 75);
play = new JButton("Play");
play.setBounds(150, 300, 100, 75);
boolean gameRunning = false;
play.addActionListener(e -> {
gameRunning = true;
});
while(gameRunning = true) {
JLabel label = new JLabel("Guess the number from 1 till 50");
label.setFont(myFont);
label.setBounds(150, 75, 315, 75);
JLabel hints = new JLabel("");
hints.setBounds(150, 180, 1000, 100);
JLabel hints2 = new JLabel("");
hints2.setBounds(150, 200, 1000, 100);
JTextField text = new JTextField();
text.setBounds(250, 150, 100, 25);
JButton check = new JButton("Check");
check.setBounds(150, 150, 75, 25);
double randomDouble = Math.random();
randomDouble = randomDouble * 50 + 1;
double randomDouble2 = Math.random();
randomDouble2 = randomDouble2 * (15 - 5 + 1) + 5 ;
double randomDouble3 = Math.random();
randomDouble3 = randomDouble3 * (15 - 5 + 1) + 5 ;
int randomHint = (int) randomDouble2;
int randomHint2 = (int) randomDouble3;
int randomInt = (int) randomDouble;
System.out.println("nb: " + randomInt);
System.out.println("hint: " + randomHint);
System.out.println("hint2: " + randomHint2);
JLabel status = new JLabel("");
status.setBounds(150, 160, 1000, 100);
JLabel closeness = new JLabel("");
closeness.setBounds(150, 220, 1000, 100);
closeness.setForeground(Color.blue);
final int[] failedAttempts = {0};
check.addActionListener(e1 -> {
String nb = text.getText();
int change = Integer.parseInt(nb);
frame.add(status);
if (randomInt == change) {
status.setText("You chose the correct number!");
status.setForeground(Color.green);
hints.setText("");
hints2.setText("");
}
if (randomInt > change) {
closeness.setText("Your answer is smaller than the correct answer");
}
if (randomInt < change) {
closeness.setText("Your answer is larger than the correct answer");
}
if (randomInt != change) {
status.setText("Wrong choice! Try again.");
status.setForeground(Color.red);
failedAttempts[0]++;
if (failedAttempts[0] == 3) {
int plus = randomInt + randomHint;
int minus = randomInt - randomHint2;
hints.setText("Hint: I see you are struggling, here is a low range to make it easier!");
hints2.setText("The lowered range is from " + plus + " to " + minus);
}
}
});
rules.setText("");
rulesText.setText("");
rulesText2.setText("");
frame.add(hints);
frame.add(hints2);
frame.add(label);
frame.add(check);
frame.add(closeness);
frame.add(text);
}
exit = new JButton("Exit");
exit.setBounds(350, 300, 100, 75);
exit.addActionListener(e -> {
int result = JOptionPane.showConfirmDialog(frame,"Are you sure want to exit?", "Exit",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE);
if(result == JOptionPane.YES_OPTION){
System.exit(0);
}
});
frame.add(play);
frame.add(exit);
frame.add(rules);
frame.add(rulesText);
frame.add(rulesText2);
frame.setVisible(true);
}
public static void main(String[] args) {
NumberGame number = new NumberGame();
}
@Override
public void actionPerformed(ActionEvent e) {
}
}
答案 0 :(得分:2)
您仍在考虑控制台应用程序,Swing 旨在处理事件...
因此,考虑到上述情况,您不能在这里指望您的代码:
play.addActionListener(e -> {
gameRunning = true;
});
while(gameRunning = true) {
...
}
按该顺序执行,因为您无法控制用户何时按下按钮,可能是 2 秒后,也可能是 2 小时后
为此,您可能需要将 while
循环移动到一个方法,并且当用户按下 play
按钮时,您需要更改 gameRunning = true
然后调用它其他方法,像这样:
public void runGame() {
while(gameRunning) {
// Your code here
}
}
play.addActionListener(e -> {
if (!gameRunning) { //This validation is needed otherwise if you press the button multiple times you'll have multiple loops running
gameRunning = true;
runGame();
}
});
这样,在用户按下 play
按钮之前,您不会开始游戏。
请注意我是如何在没有 while(gameRunning)
的情况下编写 ==
,如上面的评论中所述,如果您有 gameRunning = true
,则在使用 { {1}} 变量,您可以像这样简单地编写它们,这样可以减少出现类似拼写错误的可能性。
boolean
与 if(true)
if (true == true)
与 if(!false)
if (false == false)
与 if(false)
正如我在我的 previous answer 中提到的,避免使用 if (true == false)
和 null-layout
,为什么您实施 setBounds
而从不使用它?它是空的,所以只需删除 ActionListener
答案 1 :(得分:0)
您不能在 lambda 函数中更改局部变量的值。正如我确定编译器告诉您的那样,它们需要是 final 或有效 final 的,这意味着它们只被分配一次。
解决方案是使用一种可以保存布尔值的类型,并改为更改它所保存的值。
AtomicBoolean gameRunning = new AtomicBoolean(false);
play.addActionListener(e -> {
gameRunning.set(true);
});
...
while(gameRunning.get()) {
}