[英]Java Swing Timer Not Clear
使用Java swing的Timer函数时遇到了一些问题。 我对使用Java编程还很陌生,因此非常感谢您的帮助。 我在该网站上查看了许多其他计时器问题,但没有一个回答我的问题。 我制作了一个GUI,可用来播放剪刀石头布,您可以在其中单击三个按钮进行选择。 我希望我的程序在单击按钮后休眠1秒钟左右,然后在它显示一条消息后再次休眠。 当我意识到Thread.sleep()对我的GUI无效时,我尝试实现一个计时器。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.Border;
import java.io.*;
public class rps {
//ROCK PAPER SCISSORS
static JLabel middle = new JLabel();
static JLabel them = new JLabel();
static JLabel yourWins = new JLabel();
static JLabel theirWins = new JLabel();
static JPanel yourPanel = new JPanel();
static JPanel middlePanel = new JPanel();
static JLabel blank1 = new JLabel();
static JLabel blank2 = new JLabel();
static JButton rock = new JButton("Rock");
static JButton paper = new JButton("Paper");
static JButton scissors = new JButton("Scissors");
static int yw = 0;
static int tw = 0;
static ButtonHandler listener = new ButtonHandler();
public static void main(String[] args) {
//Create the frame
JFrame frame = new JFrame("Rock Paper Scissors");
frame.setSize(500, 500); //Setting the size of the frame
middle.setFont(new Font("Serif", Font.PLAIN, 30));
middle.setHorizontalAlignment(SwingConstants.CENTER);
them.setFont(new Font("Serif", Font.PLAIN, 15));
them.setHorizontalAlignment(SwingConstants.CENTER);
yourWins.setHorizontalAlignment(SwingConstants.CENTER);
theirWins.setHorizontalAlignment(SwingConstants.CENTER);
//Creating panels
JPanel bigPanel = new JPanel();
Border border = BorderFactory.createLineBorder(Color.BLACK, 1);
Border wlb = BorderFactory.createLineBorder(Color.RED, 1);
them.setBorder(border);
yourPanel.setBorder(border);
bigPanel.setBorder(border);
yourWins.setBorder(wlb);
theirWins.setBorder(wlb);
middlePanel.setBorder(border);
//Creating grid layouts
GridLayout yourGrid = new GridLayout(1,3,10,10);
GridLayout theirGrid = new GridLayout(1,1); //One row, one column
GridLayout middleGrid = new GridLayout(5,1);
GridLayout bigGrid = new GridLayout(3,1);//Two rows, one column
//Setting the layouts of each panel to the grid layouts created above
yourPanel.setLayout(yourGrid); //Adding layout to buttons panel
them.setLayout(theirGrid); //Adding layout to label panel
middlePanel.setLayout(middleGrid);
bigPanel.setLayout(bigGrid);
//Adding r/p/s to your grid.
yourPanel.add(rock);
yourPanel.add(paper);
yourPanel.add(scissors);
//Adding w/l rations to middlegrid.
middlePanel.add(theirWins);
middlePanel.add(blank1);
middlePanel.add(middle);
middlePanel.add(blank2);
middlePanel.add(yourWins);
//Attaching the listener to all the buttons
rock.addActionListener(listener);
paper.addActionListener(listener);
scissors.addActionListener(listener);
bigPanel.add(them);
bigPanel.add(middlePanel);
bigPanel.add(yourPanel);
//Shows the score at 0-0.
yourWins.setText("Your wins: " + yw);
theirWins.setText("Their wins: " + tw);
frame.getContentPane().add(bigPanel); //panel to frame
frame.setVisible(true); // Shows frame on screen
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//Class represents what do when a button is pressed
private static class ButtonHandler implements ActionListener {
public void actionPerformed (ActionEvent e) {
Timer timer = new Timer(1000, this);
String tc = random();
them.setText("They chose: " + tc + "!");
if (e.getSource() == rock) {
whoWins("rock", tc);
} else if (e.getSource() == paper) {
whoWins("paper", tc);
} else if (e.getSource() == scissors) {
whoWins("scissors", tc);
}
yourWins.setText("Your wins: " + yw);
theirWins.setText("Their wins: " + tw);
timer.setRepeats(false);
timer.start();
}
}
public static String random() {
int random = (int) (Math.random() * 3);
if (random == 0) {
return "Rock";
} else if (random == 1) {
return "Paper";
} else if (random == 2) {
return "Scissors";
}
return "";
}
public static void whoWins(String yc, String tc) {
if (yc.equals("rock")) {
if (tc.equals("Rock")) {
middle.setText("It's a tie!");
} else if (tc.equals("Paper")) {
middle.setText("You lose!");
tw++;
} else if (tc.equals("Scissors")) {
middle.setText("You win!");
yw++;
}
} else if (yc.equals("paper")) {
if (tc.equals("Rock")) {
middle.setText("You win!");
yw++;
} else if (tc.equals("Paper")) {
middle.setText("It's a tie!");
} else if (tc.equals("Scissors")) {
middle.setText("You lose!");
tw++;
}
} else if (yc.equals("scissors")) {
if (tc.equals("Rock")) {
middle.setText("You lose!");
tw++;
} else if (tc.equals("Paper")) {
middle.setText("You win!");
yw++;
} else if (tc.equals("Scissors")) {
middle.setText("It's a tie!");
}
}
}
}
实际发生的事情是从按下按钮到显示消息没有延迟,因为显然我没有正确使用计时器。 我希望计时器仅运行一次,然后运行该代码即可执行。 但是,当我单击按钮时,尽管setRepeats为false,计时器仍将重复运行。 因此,我要显示的消息会立即显示,而不是被延迟,但会立即显示,但随后会循环并继续显示消息(消息是随机的),直到我关闭程序为止。 如果再次单击该按钮,它将使计时器的速度翻倍,并且消息显示的速度快两倍,依此类推。
them.setText("They chose: " + tc + "!");
这是重复显示的消息,变量tc每次都会更改。 计时器似乎只是在每个计时器间隔(1s)中显示此消息。
任何帮助将不胜感激。
编辑:
所以我添加了本节:
private static class ButtonHandler implements ActionListener {
public void actionPerformed (ActionEvent e) {
// I'd be disabling the buttons here to prevent
// the user from trying to trigger another
// update...
// This is an instance field which is used by your
// listener
Timer timer = new Timer(1000, listenert);
timer.setRepeats(false);
timer.start();
}
}
private static class timer implements ActionListener {
public void actionPerformed (ActionEvent e) {
String tc = random(); //A method that chooses a random word.
them.setText("They chose: " + tc + "!");
if (e.getSource() == rock) {
whoWins("rock", tc); //whoWins is a method that will display a message.
} else if (e.getSource() == paper) {
whoWins("paper", tc);
} else if (e.getSource() == scissors) {
whoWins("scissors", tc);
}
yourWins.setText("Your wins: " + yw);
theirWins.setText("Their wins: " + tw);
// Start another Timer here that waits 1 second
// and re-enables the other buttons...
}
}
因此,我现在所相信的是,当我单击按钮时,buttonhandler侦听器将启动计时器,该计时器将连接到计时器侦听器(名为listenert),该计时器将在计时器类的actionPerformed中运行代码。 但是睡眠功能仍然不起作用
编辑2.5:
private static class ButtonHandler implements ActionListener {
public void actionPerformed (ActionEvent e) {
final JButton button = (JButton)e.getSource();
Timer timer = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
String tc = random();
them.setText("They chose: " + tc + "!");
if (button == rock) {
whoWins("rock", tc);
} else if (button == paper) {
whoWins("paper", tc);
} else if (button == scissors) {
whoWins("scissors", tc);
}
yourWins.setText("Your wins: " + yw);
theirWins.setText("Their wins: " + tw);
}
});
timer.setRepeats(false);
timer.start();
}
}
到目前为止,我只需要在它们之后添加另一个睡眠即可。setText(“他们选择了:” + tc +“!”); 如果有的话,我该在哪里放置timer.restart()? timer.start()位于我不太了解的方法的末尾。
因此,当计时器“滴答”时,将通知您提供给Timer
的ActionListener
,因此ButtonHandler
actionPerformed
应该看起来更像...
public void actionPerformed (ActionEvent e) {
// I'd be disabling the buttons here to prevent
// the user from trying to trigger another
// update...
// This is an instance field which is used by your
// listener
choice = e.getSource();
Timer timer = new Timer(1000, listener);
timer.setRepeats(false);
timer.start();
}
您的listener
应该看起来更像
public void actionPerformed (ActionEvent e) {
String tc = random(); //A method that chooses a random word.
them.setText("They chose: " + tc + "!");
if (choice == rock) {
whoWins("rock", tc); //whoWins is a method that will display a message.
} else if (choice == paper) {
whoWins("paper", tc);
} else if (choice == scissors) {
whoWins("scissors", tc);
}
yourWins.setText("Your wins: " + yw);
theirWins.setText("Their wins: " + tw);
// Start another Timer here that waits 1 second
// and re-enables the other buttons...
}
例如...
您可以考虑查看如何使用Swing计时器以了解更多详细信息
更新
从一个简单的示例开始...公共类TestPane扩展了JPanel {
private JLabel label;
private SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
public TestPane() {
setLayout(new GridBagLayout());
label = new JLabel();
add(label);
tick();
Timer timer = new Timer(500, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
tick();
}
});
timer.start();
}
protected void tick() {
label.setText(sdf.format(new Date()));
}
}
这只是每半秒调用一次tick
方法以更新JLabel
上的时间...
首先导入以下内容;
import java.awt.event.ActionEvent ;
import java.awt.event.ActionListener ;
import javax.swing.Timer ;
然后像这样在表单的末尾初始化计时器; 公共静态void main(String args []){
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new mainprogramme().setVisible(true);
}
});
}
private Timer timer ;
然后在初始化计时器之后,添加一个公共类,如下所示;
公共类的进度实现了ActionListener {public void actionPerformed(ActionEvent evt){
int n = 0 ;
if (n<100){
n++ ;
System.out.println(n) ;
}else{
timer.stop() ;
}
}
}
完成此操作后,转到j框架>右键单击并选择>事件>窗口>打开的窗口,然后键入以下内容;
private void formWindowOpened(java.awt.event.WindowEvent evt) {
timer = new Timer(100,new progress()) ;
在完成所有这些操作之后,将按钮命名为任何名称,然后在其空白处输入following,如下所示;
timer.start();
这就是代码,然后回复我...
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