我尝试重新创建 Connect Four ，我成功了。但是我想通过频繁切换颜色来向玩家说明获胜四张碟的位置。我是线程和编程时间概念的新手。
我也成功地向用户提供了这个指示，但在我关闭应用程序后，控制台仍然提供输出，当我使用setOnCloseRequest时。
其他一些问题：
1 ：对于使用html名称的颜色，最好使用十六进制三联或无偏好。
2 ：为了阻止网格和其他元素拥抱屏幕的左侧，我添加了一个与背景颜色相同的边框，有更好的方法吗？
3 ：我没有创建将键码转换为整数但是在init函数中创建的方法。我这样做是因为我不知道如何传递keyevent。怎么做？
以下是代码：
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class FourInARow extends Application {
GridPane boardGrid = new GridPane();
Label[][] labels = new Label[7][7];
Label statusLabel = new Label();
int[][] cell = new int[7][6];
int player = 0;
int won = 0;
String baseStyle = "-fx-background-radius: 40; -fx-min-width: 80; -fx-min-height: 80; -fx-alignment: center; -fx-border-width: 2; -fx-border-color: #000000;-fx-background-color: ";
ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();
public static void main(String[] args){launch(args);}
private void init(Stage window){
createLabels();
startGame();
Label above = new Label("Try to connect four discs in a row!");
above.setStyle("-fx-font-size: 30; -fx-alignment: center; -fx-min-width: 600");
boardGrid.setStyle("-fx-background-color: silver;-fx-border-color: #F4F4F4;-fx-border-width: 0 20 0 20");
Button newGame = new Button("New Game");
newGame.setStyle("-fx-min-width: 100;-fx-font-size:20");
newGame.setOnAction(e -> startGame());
statusLabel.setStyle("-fx-font-size: 30;-fx-alignment: center; -fx-min-width: 300;");
HBox below = new HBox();
below.setStyle("-fx-border-width: 0 0 0 20;-fx-border-color: #F4F4F4");
below.getChildren().addAll(newGame, statusLabel);
VBox layout = new VBox();
layout.getChildren().addAll(above, boardGrid, below);
Scene scene = new Scene(layout, 600, 620);
scene.setOnKeyPressed(e -> {
if (won == 0) {
try {
String k = e.getCode().toString();
int l = k.length();
int col = Integer.parseInt(k.substring(l - 1, l)) - 1;
placeDisc(col, player);
switchPlayer();
updateScreen();
} catch (NumberFormatException | ArrayIndexOutOfBoundsException error) {
System.out.println("error: " + error);
}
}
});
window.setScene(scene);
window.setTitle("Connect Four");
threadThing();
}
private void threadThing() {
service.scheduleAtFixedRate(() -> {
try {
wonStyle();
} catch (InterruptedException e) {
e.printStackTrace();
}
}, 0, 1, TimeUnit.SECONDS);
}
private void startGame() {
cell = new int[7][6];
won = player = 0;
statusLabel.setText("");
updateScreen();
}
private void updateScreen() {
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 6; j++) {
labels[i][j].setStyle(baseStyle + addStyle(cell[i][j]));
}
labels[i][6].setText(Integer.toString(i+1));
labels[i][6].setStyle("-fx-alignment: center;-fx-min-width: 80;-fx-background-color: #F4F4F4;-fx-font-size: 30;");
}
switch(won) {
case 1: statusLabel.setText("Blue has won!");break;
case 2: statusLabel.setText("Yellow has won!");break;
}
}
private String addStyle(int cell) {
String style = "silver";
switch(cell){
case 1: style = "blue"; break;
case 2: style = "yellow"; break;
case 3: style = "darkblue"; break;
case 4: style = "gold;"; break;
}
return style;
}
private void placeDisc(int col, int player) {
for (int i = 5; i >= 0 ; i--) {
if(cell[col][i] == 0){
cell[col][i] = 1;
if(player == 1) cell[col][i] = 2;
break;
}else{
if(i==0) switchPlayer();
}
}
checkWon();
}
private void checkWon() {
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 6; j++) {
if (cell[i][j] != 0) {
try {
if (cell[i][j] == cell[i][j + 1] && cell[i][j] == cell[i][j + 2] && cell[i][j] == cell[i][j + 3]) {
won = cell[i][j];
cell[i][j] = cell[i][j + 1] = cell[i][j + 2] = cell[i][j + 3] = cell[i][j] + 2;
}
}catch(ArrayIndexOutOfBoundsException error) {}
try {
if (cell[i][j] == cell[i + 1][j] && cell[i][j] == cell[i + 2][j] && cell[i][j] == cell[i + 3][j]) {
System.out.println("Horizontal win");
won = cell[i][j];
cell[i][j] = cell[i + 1][j] = cell[i + 2][j] = cell[i + 3][j] = cell[i][j] + 2;
}
}catch(ArrayIndexOutOfBoundsException error) {}
try {
if (cell[i][j] == cell[i + 1][j + 1] && cell[i][j] == cell[i + 2][j + 2] && cell[i][j] == cell[i + 3][j + 3]) {
won = cell[i][j];
cell[i][j] = cell[i + 1][j + 1] = cell[i + 2][j + 2] = cell[i + 3][j + 3] = cell[i][j] + 2;
}
}catch(ArrayIndexOutOfBoundsException error) {}
try {
if (cell[i][j] == cell [i + 1][j - 1] && cell[i][j] == cell[i + 2][j - 2] && cell[i][j] == cell[i + 3][j - 3]) {
won = cell[i][j];
cell[i][j] = cell[i + 1][j - 1] = cell[i + 2][j - 2] = cell[i + 3][j - 3] = cell[i][j] + 2;
}
}catch(ArrayIndexOutOfBoundsException error) {}
}
}
}
}
private void switchPlayer() {
if(player == 0) player = 2;
player--;
}
private void createLabels() {
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 7; j++) {
labels[i][j] = new Label();
boardGrid.add(labels[i][j], i, j);
}
}
}
private void wonStyle() throws InterruptedException {
System.out.println("Test");
boolean run = false;
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 6; j++) {
if(cell[i][j] > 2 && !run){
Thread.sleep(500);
addStyleFlicker();
run = true;
}
}
}
}
private void addStyleFlicker() throws InterruptedException {
String[] styleOne = {"-fx-background-radius: 40; -fx-min-width: 80; -fx-min-height: 80; -fx-alignment: center; -fx-border-width: 2; -fx-border-color: #000000;-fx-background-color: blue;",
"-fx-background-radius: 40; -fx-min-width: 80; -fx-min-height: 80; -fx-alignment: center; -fx-border-width: 2; -fx-border-color: #000000;-fx-background-color: darkblue;"};
String[] styleTwo = {"-fx-background-radius: 40; -fx-min-width: 80; -fx-min-height: 80; -fx-alignment: center; -fx-border-width: 2; -fx-border-color: #000000;-fx-background-color: yellow;",
"-fx-background-radius: 40; -fx-min-width: 80; -fx-min-height: 80; -fx-alignment: center; -fx-border-width: 2; -fx-border-color: #000000;-fx-background-color: gold;"};
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 6; j++) {
if(cell[i][j] == 3){
labels[i][j].setStyle(styleOne[0]);
}else if(cell[i][j] == 4){
labels[i][j].setStyle(styleTwo[0]);
}
}
}
Thread.sleep(500);
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 6; j++) {
if(cell[i][j] == 3){
labels[i][j].setStyle(styleOne[1]);
}else if(cell[i][j] == 4) {
labels[i][j].setStyle(styleTwo[1]);
}
}
}
}
@Override
public void start(Stage window) throws Exception {
init(window);
window.show();
}
}
答案 0 :(得分：4)
根据Thread类的Java API文档......
Java虚拟机继续执行线程，直到发生以下任一情况：
- 已调用类Runtime的exit方法，安全管理器已允许退出操作。
- 所有非守护程序线程的线程都已死亡，无论是通过调用run方法返回还是抛出一个超出run方法传播的异常。
因此，您需要Executor来创建在JVM准备好退出时将死的守护程序线程。您可以使用自定义线程工厂执行此操作。这是一个非常简单的例子：
Executors.newSingleThreadScheduledExecutor(new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setDaemon(true);
return t;
}
});
答案 1 :(得分：2)
from json import JSONEncoder
from flask import Flask, jsonify
class CustomJSONEncoder(JSONEncoder):
def default(self, obj):
return {"hello": "world"}
app = Flask(__name__)
app.json_encoder = CustomJSONEncoder
@app.route('/')
def main():
return jsonify({'yep': 'this worked'})
if __name__ == '__main__':
app.run()