我正试图用java创建一个程序，这个程序基本上是伪造彩票的。它可以让你从5个随机数字中快速选择，也可以让你自己选择。快速选择和个人按钮工作正常。单击快速拾取后，它会在5个随机框中显示5个随机数字。现在的问题是，当点击播放按钮时，中奖号码不会显示，程序也不会记录需要多少年和多少张图纸，如果我得到了6个数字中的3个，它也不会显示，等等。请记住，程序运行时没有一个错误。
这是我为制作gui的第一个类编写的代码：
public class LotteryInterface extends JFrame {
LotteryEvent hello = new LotteryEvent(this);
//set up row 1
JPanel row1 = new JPanel();
ButtonGroup option = new ButtonGroup();
JCheckBox quickpick = new JCheckBox("Quick Pick", false);
JCheckBox personal = new JCheckBox("Personal", true);
//set up row 2
JPanel row2 = new JPanel();
JLabel numbersLabel = new JLabel("Your Picks", JLabel.RIGHT);
JTextField[] numbers = new JTextField[6];
JLabel winnersLabel = new JLabel("Winners", JLabel.RIGHT);
JTextField[] winners = new JTextField[6];
//set up row 3
JPanel row3 = new JPanel();
JButton play = new JButton("Play");
JButton stop = new JButton("Stop");
JButton reset = new JButton("Reset");
//set up row 4
JPanel row4 = new JPanel();
JLabel got3label = new JLabel("3 of 6", JLabel.RIGHT);
JTextField got3 = new JTextField("0");
JLabel got4Label = new JLabel("4 of 6", JLabel.RIGHT);
JTextField got4 = new JTextField("0");
JLabel got5label = new JLabel("5 of 6", JLabel.RIGHT);
JTextField got5 = new JTextField("0");
JLabel got6label = new JLabel("6 of 6", JLabel.RIGHT);
JTextField got6 = new JTextField("0", 10);
JLabel drawingsLabel = new JLabel("Drawings", JLabel.RIGHT);
JTextField drawings = new JTextField();
JLabel yearsLabel = new JLabel("Years", JLabel.RIGHT);
JTextField years = new JTextField();
public LotteryInterface() {
super("Lottery Interface");
setLookAndFeel();
setSize(550, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
GridLayout layout = new GridLayout(0, 1, 10, 10);
setLayout(layout);
personal.addItemListener(hello);
quickpick.addItemListener(hello);
play.addActionListener(hello);
stop.addActionListener(hello);
reset.addActionListener(hello);
FlowLayout layout1 = new FlowLayout(FlowLayout.CENTER, 10, 10);
option.add(quickpick);
option.add(personal);
row1.setLayout(layout1);
row1.add(quickpick);
row1.add(personal);
add(row1);
GridLayout layout2 = new GridLayout(2, 7, 10, 10);
row2.setLayout(layout2);
row2.add(numbersLabel);
for (int i = 0; i < 6; i++) {
numbers[i] = new JTextField();
row2.add(numbers[i]);
}
row2.add(winnersLabel);
for (int i = 0; i < 6; i++) {
winners[i] = new JTextField();
winners[i].setEditable(false);
row2.add(winners[i]);
}
add(row2);
FlowLayout layout3 = new FlowLayout(FlowLayout.CENTER, 10, 10);
row3.setLayout(layout3);
row3.add(stop);
row3.add(play);
row3.add(reset);
add(row3);
GridLayout layout4 = new GridLayout(2, 3, 20, 10);
row4.setLayout(layout4);
row4.add(got3label);
got3.setEditable(false);
row4.add(got3);
row4.add(got4Label);
got4.setEditable(false);
row4.add(got4);
row4.add(got5label);
got5.setEditable(false);
row4.add(got5);
row4.add(got6label);
got6.setEditable(false);
row4.add(got6);
row4.add(drawingsLabel);
drawings.setEditable(false);
row4.add(drawings);
row4.add(yearsLabel);
years.setEditable(false);
row4.add(years);
add(row4);
setVisible(true);
}
private void setLookAndFeel() {
}
public static void main(String args[]) {
LotteryInterface yeah = new LotteryInterface();
}
}
这是让gui执行操作的第二个类：
public class LotteryEvent extends JFrame implements ActionListener, ItemListener, Runnable {
LotteryInterface gui;
Thread playing;
public LotteryEvent(LotteryInterface in ) {
gui = in ;
}
@Override
public void actionPerformed(ActionEvent event) {
String command = event.getActionCommand();
if (command.equals("Play")) {
startPlaying();
}
if (command.equals("Stop")) {
stopPlaying();
}
if (command.equals("Reset")) {
clearAllFields();
}
}
void startPlaying() {
playing = new Thread(this);
playing.start();
gui.play.setEnabled(false);
gui.stop.setEnabled(true);
gui.reset.setEnabled(false);
gui.quickpick.setSelected(false);
gui.personal.setEnabled(false);
}
void stopPlaying() {
gui.play.setEnabled(true);
gui.stop.setEnabled(false);
gui.reset.setEnabled(true);
gui.quickpick.setSelected(true);
gui.personal.setEnabled(true);
playing = null;
}
void clearAllFields() {
for (int i = 0; i < 6; i++) {
gui.winners[i].setText(null);
gui.numbers[i].setText(null);
}
gui.got3.setText("0");
gui.got4.setText("0");
gui.got4.setText("0");
gui.got5.setText("0");
gui.got6.setText("0");
gui.years = null;
gui.drawings = null;
}
@Override
public void itemStateChanged(ItemEvent event) {
Object item = event.getItem();
if (item == gui.quickpick) {
for (int i = 0; i < 6; i++) {
int pick;
do {
pick = (int) Math.floor(Math.random() * 50 + 1);
} while (numberGone(pick, gui.numbers, i));
gui.numbers[i].setText("" + pick);
}
} else {
for (int i = 0; i < 6; i++) {
gui.numbers[i].setText(null);
}
}
}
void addOneToField(JTextField field) {
int num = Integer.parseInt("0" + field.getText());
num++;
field.setText("" + num);
}
boolean numberGone(int nums, JTextField[] pastNums, int count) {
for (int i = 0; i < count; i++) {
if (Integer.parseInt(pastNums[i].getText()) == nums) {
return true;
}
}
return false;
}
boolean matchedOne(JTextField win, JTextField[] allpicks) {
for (int i = 0; i < 6; i++) {
String winText = win.getText();
if (winText.equals(allpicks[i].getText())) {
return true;
}
}
return false;
}
@Override
public void run() {
Thread thisThread = new Thread();
while (playing == thisThread) {
addOneToField(gui.drawings);
int draw = Integer.parseInt(gui.drawings.getText());
float numYears = (float) draw / 104;
gui.years.setText("" + numYears);
int matches = 0;
for (int i = 6; i < 6; i++) {
int ball;
do {
ball = (int) Math.floor(Math.random() * 50 + 1);
} while (numberGone(ball, gui.winners, i));
gui.winners[i].setText("" + ball);
if (matchedOne(gui.winners[i], gui.numbers)) {
matches++;
}
}
switch (matches) {
case 3:
addOneToField(gui.got3);
break;
case 4:
addOneToField(gui.got4);
break;
case 5:
addOneToField(gui.got5);
break;
case 6:
addOneToField(gui.got6);
gui.stop.setEnabled(false);
gui.play.setEnabled(true);
playing = null;
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
}
}
}
好吧，问题很简单，解决方案不太。。。
当你打电话给startPlaying时，你会…
playing = new Thread(this);
但当调用run时，您会执行此操作。。。
Thread thisThread = new Thread();
while (playing == thisThread) {
问题是，thisThread和playing从不相等。
一个更好的解决方案可能是使用AtomicBoolean作为运行状态标志，并检查。。。然而
Swing不是线程安全的，您正试图从事件调度线程的上下文之外更新UI
一个更好的解决方案是实际使用SwingTimer，这将允许您以常规延迟设置重复回调，该延迟将在事件调度线程的上下文中通知。
另一个好处是，SwingTimer有自己的stop方法。。。
有关更多详细信息，请参阅Swing中的并发和如何使用Swing定时器。
正如已经指出的，LotteryEvent没有必要从JFrame扩展，事实上，我认为它甚至不应该实现ActionListener或ItemListener，但这就是我的
更新示例
此外，这个for (int i = 6; i < 6; i++) {是错误的。。。
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class LotteryInterface extends JPanel {
LotteryEvent hello = new LotteryEvent(this);
//set up row 1
JPanel row1 = new JPanel();
ButtonGroup option = new ButtonGroup();
JCheckBox quickpick = new JCheckBox("Quick Pick", false);
JCheckBox personal = new JCheckBox("Personal", true);
//set up row 2
JPanel row2 = new JPanel();
JLabel numbersLabel = new JLabel("Your Picks", JLabel.RIGHT);
JTextField[] numbers = new JTextField[6];
JLabel winnersLabel = new JLabel("Winners", JLabel.RIGHT);
JTextField[] winners = new JTextField[6];
//set up row 3
JPanel row3 = new JPanel();
JButton play = new JButton("Play");
JButton stop = new JButton("Stop");
JButton reset = new JButton("Reset");
//set up row 4
JPanel row4 = new JPanel();
JLabel got3label = new JLabel("3 of 6", JLabel.RIGHT);
JTextField got3 = new JTextField("0");
JLabel got4Label = new JLabel("4 of 6", JLabel.RIGHT);
JTextField got4 = new JTextField("0");
JLabel got5label = new JLabel("5 of 6", JLabel.RIGHT);
JTextField got5 = new JTextField("0");
JLabel got6label = new JLabel("6 of 6", JLabel.RIGHT);
JTextField got6 = new JTextField("0", 10);
JLabel drawingsLabel = new JLabel("Drawings", JLabel.RIGHT);
JTextField drawings = new JTextField();
JLabel yearsLabel = new JLabel("Years", JLabel.RIGHT);
JTextField years = new JTextField();
public LotteryInterface() {
GridLayout layout = new GridLayout(0, 1, 10, 10);
setLayout(layout);
ItemListener itemListener = new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
Object item = e.getItem();
if (item == quickpick) {
for (int i = 0; i < 6; i++) {
int pick;
do {
pick = (int) Math.floor(Math.random() * 50 + 1);
} while (numberGone(pick, numbers, i));
numbers[i].setText("" + pick);
}
} else {
for (int i = 0; i < 6; i++) {
numbers[i].setText(null);
}
}
}
};
personal.addItemListener(itemListener);
quickpick.addItemListener(itemListener);
play.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
hello.start();
}
});
stop.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
hello.stop();
}
});
reset.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
hello.stop();
clearAllFields();
}
});
FlowLayout layout1 = new FlowLayout(FlowLayout.CENTER, 10, 10);
option.add(quickpick);
option.add(personal);
row1.setLayout(layout1);
row1.add(quickpick);
row1.add(personal);
add(row1);
GridLayout layout2 = new GridLayout(2, 7, 10, 10);
row2.setLayout(layout2);
row2.add(numbersLabel);
for (int i = 0; i < 6; i++) {
numbers[i] = new JTextField();
row2.add(numbers[i]);
}
row2.add(winnersLabel);
for (int i = 0; i < 6; i++) {
winners[i] = new JTextField();
winners[i].setEditable(false);
row2.add(winners[i]);
}
add(row2);
FlowLayout layout3 = new FlowLayout(FlowLayout.CENTER, 10, 10);
row3.setLayout(layout3);
row3.add(stop);
row3.add(play);
row3.add(reset);
add(row3);
GridLayout layout4 = new GridLayout(2, 3, 20, 10);
row4.setLayout(layout4);
row4.add(got3label);
got3.setEditable(false);
row4.add(got3);
row4.add(got4Label);
got4.setEditable(false);
row4.add(got4);
row4.add(got5label);
got5.setEditable(false);
row4.add(got5);
row4.add(got6label);
got6.setEditable(false);
row4.add(got6);
row4.add(drawingsLabel);
drawings.setEditable(false);
row4.add(drawings);
row4.add(yearsLabel);
years.setEditable(false);
row4.add(years);
add(row4);
}
void clearAllFields() {
for (int i = 0; i < 6; i++) {
winners[i].setText(null);
numbers[i].setText(null);
}
got3.setText("0");
got4.setText("0");
got4.setText("0");
got5.setText("0");
got6.setText("0");
years = null;
drawings = null;
}
boolean numberGone(int nums, JTextField[] pastNums, int count) {
for (int i = 0; i < count; i++) {
if (Integer.parseInt(pastNums[i].getText()) == nums) {
return true;
}
}
return false;
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new LotteryInterface());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class LotteryEvent {
LotteryInterface gui;
private Timer timer;
public LotteryEvent(LotteryInterface in) {
gui = in;
timer = new Timer(100, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
addOneToField(gui.drawings);
int draw = Integer.parseInt(gui.drawings.getText());
float numYears = (float) draw / 104;
gui.years.setText("" + numYears);
int matches = 0;
for (int i = 0; i < 6; i++) {
int ball;
do {
ball = (int) Math.floor(Math.random() * 50 + 1);
} while (numberGone(ball, gui.winners, i));
gui.winners[i].setText("" + ball);
if (matchedOne(gui.winners[i], gui.numbers)) {
matches++;
}
}
switch (matches) {
case 3:
addOneToField(gui.got3);
break;
case 4:
addOneToField(gui.got4);
break;
case 5:
addOneToField(gui.got5);
break;
case 6:
addOneToField(gui.got6);
gui.stop.setEnabled(false);
gui.play.setEnabled(true);
stop();
}
}
});
}
public void stop() {
timer.stop();
}
public void start() {
timer.start();
}
void addOneToField(JTextField field) {
int num = Integer.parseInt("0" + field.getText());
num++;
field.setText("" + num);
}
boolean matchedOne(JTextField win, JTextField[] allpicks) {
for (int i = 0; i < 6; i++) {
String winText = win.getText();
if (winText.equals(allpicks[i].getText())) {
return true;
}
}
return false;
}
}
}
发现问题
Thread thisThread = new Thread();
需要更改为
Thread thisThread = thread.currentThread();