[英]java.util.Timer && Swing mishaps
目前,我正在制作一个回合制游戏,它有一个带有剩余时间的 JLabel、几个其他的问题/答案/团队分数标签,以及一个带有游戏板的主面板。
这段代码的第一个问题:GameTimer 类被调用得太频繁,IE 它不是每秒被调用,而是每秒大约 5-10 次。 (输出 "Timer: " + timeElapsed 的打印语句在大约 10 秒内打印每个数字,最多可达 80(定时器:1,定时器:2 等)。作为旁注,问题的时间永远不会超过 15秒。while 循环不应该在它失控之前停止吗?这个问题只偶尔发生。我认为这是一个 util.Timer 相关的错误,不在我的代码中,但我对类的内部工作不太熟悉.
第二个问题:for:each 循环在无限循环中被调用,因为它打印“Reached Questions. Number of questions:” + questions.size() 并无限期地继续 for:each 循环。 我不认为 windowOpened() 可以被多次调用,而且我还使用了 windowActivated() 并得到了相同的结果。
最后一个问题:时间标签只有在 timeElapsed 超过 question.getTime 后才会更新,这意味着标签中只会有一个负数。 while 循环应该检测到 timeElapsed 更大,然后停止,但事实并非如此。
我对所有这些感到困惑,非常感谢任何帮助。
项目的一点历史:在实现 windowListener 之前,该类只是在执行 for:each 循环之前等待了 30 秒,这不起作用,因为在计时器完成之前窗口将是灰屏(卸载),然后它会正常加载,但 GameTimer 在 30 秒计时器后立即启动。 然后我尝试使用 Thread 每秒更新一次,但这与之前的尝试有类似的问题。
除此以外还有其他类。 这两个是我认为错误在其中的:
游戏画面代码:
import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import java.util.*;
import java.awt.event.*;
@SuppressWarnings("deprecation")
public class GameScreen implements WindowListener{
private int team1Score = 0;
private int team2Score = 0;
private ArrayList<Question> questions;
private Question cQuestion;
private boolean start = false;
private boolean timesUp = false;
private boolean isCorrect = false;
private java.util.Timer timer = new java.util.Timer();
private int timeElapsed = 0;
private boolean isTeam1 = true;
private String correctAnswer = "";
private String inputAnswer = "";
private int numIncorrect = 0;
private TopPanel topPanel = new TopPanel();
public GameScreen(ArrayList<Question> questions) {
JFrame gameFrame = new JFrame("Cavazos Math Game");
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
int width = (int)screenSize.getWidth();
int height = (int)screenSize.getHeight();
gameFrame.setSize(width, height);
gameFrame.setResizable(false);
gameFrame.setLocationRelativeTo(null);
gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
topPanel.setSize(width, 200);
this.questions = questions;
BorderLayout layout = new BorderLayout();
gameFrame.setLayout(layout);
System.out.println("Reached Image Loading");
try {
BufferedImage fieldImage = ImageIO.read(new File("field2.png"));
GamePanel gamePanel = new GamePanel(fieldImage);
gamePanel.setSize(width, height - 200);
gameFrame.add(gamePanel, BorderLayout.CENTER);
}
catch(Exception e) {System.out.println("RUH ROH");}
System.out.println("Reached Layout Loading");
gameFrame.add(topPanel, BorderLayout.NORTH);
gameFrame.setVisible(true);
gameFrame.addKeyListener(topPanel);
gameFrame.addWindowListener(this);
}
public void windowDeactivated(WindowEvent e) {}
public void windowIconified(WindowEvent e) {}
public void windowDeiconified(WindowEvent e) {}
public void windowClosed(WindowEvent e) {}
public void windowClosing(WindowEvent e) {}
public void windowActivated(WindowEvent e) {}
public void windowOpened(WindowEvent e) {
System.out.println("Reached Questions. Number of question: " + questions.size());
for(Question question : questions) {
timeElapsed = 0;
cQuestion = question;
timesUp = false;
topPanel.setQuestion(question.getQuestionString());
setTimer(question.getTime());
correctAnswer = question.getAnswer();
System.out.println(question.getTime() + "");
while((timeElapsed < question.getTime()) && !isCorrect && (numIncorrect <= 4)) {
if(!topPanel.getInput().equals("nothing")) { //has an answer been submitted?
inputAnswer = topPanel.getInput();
if(!inputAnswer.equals(correctAnswer)) { //is it the wrong answer
numIncorrect++;
topPanel.setAnswer("");
}
else {
numIncorrect = 0;
isCorrect = true;
if(isTeam1) {
team1Score += question.getPoints();
}
else {
team2Score += question.getPoints();
}
}
}
else {
}
topPanel.setTimer(cQuestion.getTime() - timeElapsed);
}
isTeam1 = !isTeam1;
}
}
class GameTimer extends TimerTask {
public void run() {
System.out.println("Timer: " + timeElapsed);
timeElapsed++;
topPanel.setTimer(cQuestion.getTime() - timeElapsed);
}
}
public void setTimer(int seconds) {
System.out.println("Timer has started");
timer = new java.util.Timer();
timer.schedule(new GameTimer(), 0, 1000);
}
}
顶部面板代码:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TopPanel extends JPanel implements KeyListener {
JLabel questionLabel = new JLabel("Test Question");
JTextField answerLabel = new JTextField("Answer label");
JTextField timer = new JTextField("Timer Label");
JTextField team1 = new JTextField("Team 1: 0");
JTextField team2 = new JTextField("Team 2: 0");
JPanel teamScores = new JPanel();
//timer.setEditable(false);
//team1.setEditable(false);
//team2.setEditable(false);
//answerLabel.setEditable(false);
String inputString = "";
boolean doneInputting = false;
GridLayout scoresLayout = new GridLayout(2,1);
GridLayout topLayout = new GridLayout(1,4);
public TopPanel() {
teamScores.setLayout(scoresLayout);
teamScores.add(team1);
teamScores.add(team2);
this.setLayout(topLayout);
this.setSize(getWidth(), 100);
this.add(questionLabel);
this.add(answerLabel);
this.add(timer);
this.add(teamScores);
Font topFont = new Font("Sans Serif", Font.PLAIN, 32);
this.setFont(topFont);
}
public void setQuestion(String question) {
questionLabel.setText(question);
}
public void setAnswer(String answer) {
answerLabel.setText(answer);
}
public void setTimer(int time) {
timer.setText(time + "");
}
public void setTeam1Score(int score) {
team1.setText(score + "");
}
public void addTeam1Score(int score) {
team1.setText(score + "");
}
public void setTeam2Score(int score) {
team2.setText(score + "");
}
public String getInput() {
if(doneInputting) {
return inputString;
}
return "nothing";
}
public String getCurrentInput() {
return inputString;
}
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
public void keyTyped(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_9) {
inputString += "9";
}
else if(e.getKeyCode() == KeyEvent.VK_8) {
inputString += "8";
}
else if(e.getKeyCode() == KeyEvent.VK_7) {
inputString += "7";
}
else if(e.getKeyCode() == KeyEvent.VK_6) {
inputString += "6";
}
else if(e.getKeyCode() == KeyEvent.VK_5) {
inputString += "5";
}
else if(e.getKeyCode() == KeyEvent.VK_4) {
inputString += "4";
}
else if(e.getKeyCode() == KeyEvent.VK_3) {
inputString += "3";
}
else if(e.getKeyCode() == KeyEvent.VK_2) {
inputString += "2";
}
else if(e.getKeyCode() == KeyEvent.VK_1) {
inputString += "1";
}
else if(e.getKeyCode() == KeyEvent.VK_0) {
inputString += "0";
}
else if(e.getKeyCode() == KeyEvent.VK_BACK_SPACE) {
inputString = inputString.substring(0, inputString.length()-1);
}
else if(e.getKeyCode() == KeyEvent.VK_T) {
inputString += "TRUE";
}
else if(e.getKeyCode() == KeyEvent.VK_F) {
inputString += "FALSE";
}
else if(e.getKeyCode() == KeyEvent.VK_P) {
inputString += "π";
}
else if(e.getKeyCode() == KeyEvent.VK_S) {
inputString += "√";
}
else if(e.getKeyCode() == KeyEvent.VK_ENTER) {
doneInputting = true;
}
else if(e.getKeyCode() == KeyEvent.VK_SLASH) {
inputString += "/";
}
setAnswer(inputString);
}
}
您在 while 循环的每次迭代中都会启动一个新的 Timer 对象,因此每次在循环内创建一个新的 Timer 实例时,都会以额外的速度推进您的 timeElapsed 字段。 解决方案是不这样做,只使用一个 Timer,或者在创建一个新的 Timer 之前停止一个 Timer,....但是话虽如此,您的代码中还有其他重大问题,包括:
如果您需要更详细的帮助,请回复上面的评论,并帮助我们提供您的最小示例程序,一个我们可以自己运行和修改的程序。 我们不想看到您的整个程序,也不想看到链接,而是希望看到向我们展示您的问题的最小程序。
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