JavaFx卡在while循环中
我是JavaFx新手，正在尝试编写我的刽子手游戏。我必须检查保存我词典的文件是否在那里。如果没有，请要求用户输入其位置。我试图在一个弹出窗口中执行此操作，该窗口要求用户输入位置并点击一个按钮，该按钮将导致textbox.getText（）被保存并加载。如果位置不好，请重复。为了让这个弹出窗口运行，我故意拼错了位置，但它被卡在了一个while循环中，迫使我结束应用程序。我把它当作一个新的场景来运行，但是我被接下来该做什么所困扰。这是我的Controller.java 仅供参考：虽然这是大学的家庭作业，但我没有被录取。我是残疾学生，我的朋友正在上课。我试着通过玩弄他的作业来保持忙碌。我喜欢编写代码，这让我忙个不停，不断更新，我开始学习新东西JavaFx卡在while循环中,java,intellij-idea,while-loop,javafx-8,scenebuilder,Java,Intellij Idea,While Loop,Javafx 8,Scenebuilder,我是JavaFx新手，正在尝试编写我的刽子手游戏。我必须检查保存我词典的文件是否在那里。如果没有，请要求用户输入其位置。我试图在一个弹出窗口中执行此操作，该窗口要求用户输入位置并点击一个按钮，该按钮将导致textbox.getText（）被保存并加载。如果位置不好，请重复。为了让这个弹出窗口运行，我故意拼错了位置，但它被卡在了一个while循环中，迫使我结束应用程序。我把它当作一个新的场景来运行，但是我被接下来该做什么所困扰。这是我的Controller.java 仅供参考：虽然这是大学的家庭作
package sample;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Stage;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Controller {
public Label welcomeLabel, guessesLettersLabel, GuessesRemainingLabel, currentStateLAbel, endGameMessageLabel;
public Button newGameButton, exitButton, enterTextButton;
public TextField enterTextBox;
public boolean ynAnswer;
public String textAnswer;
Stage window;
File inputFile;
public void newGame() throws FileNotFoundException {
Scanner input = new Scanner(System.in);
inputFile = new File("src\\sample\\HangmanLexcon.txt");
while(!inputFile.exists()) {
window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle("File was not found.");
window.setMinWidth(250);
window.setMaxHeight(100);
//form
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
//Layout
VBox layout = new VBox(10);
layout.setPadding(new Insets(20, 20, 20, 20));
layout.getChildren().addAll(fileInput, inputButton);
//Set scene and show in window.
Scene scene = new Scene(layout, 300, 100);
window.setScene(scene);
window.show();
}
Hangman newGame = new Hangman(inputFile.toString());
welcomeLabel.setText("A word has been selected. Good luck, and may the odds ever be in your favor.");
guessesLettersLabel.setText("Guessed Letters: " + newGame.getGuessedLetters());
GuessesRemainingLabel.setText("Guesses remaining: " + newGame.getIncorrectGuessesRemaining());
currentStateLAbel.setText("Current State: " + newGame.getCurrentState());
}
public void enterTextButton(){
System.out.println("You pressed enter...");
}
public void enterText(){
enterTextButton();
}
/**
* If the player closed to exit the game or hit the X button this method will ask if they are
* sure they wish to exit before quiting the game.
*/
public void exitGame(){
Boolean answer = desplayYesNoMessgae("Exit", "Are you sure you want to exit?");
if(answer)
System.exit(0);
}
public boolean desplayYesNoMessgae(String title, String message){
Stage window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle(title);
window.setMinWidth(250);
Label label1 = new Label();
label1.setText(message);
//Create two buttons, yes and no
Button yesButton = new Button("Yes");
Button noButton = new Button("No");
//If yes ic clucked, set answer to true.
yesButton.setOnAction(e -> {
ynAnswer = true;
window.close();
});
//if no is clicked, set answer to false.
noButton.setOnAction(e -> {
ynAnswer = false;
window.close();
});
VBox layout = new VBox(10);
layout.getChildren().addAll(label1, yesButton, noButton);
layout.setAlignment(Pos.CENTER);
Scene scene = new Scene(layout);
window.setScene(scene);
window.showAndWait();
return ynAnswer;
}
public String desplayTextMessgae(String title, String message){
Stage window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle(title);
window.setMinWidth(250);
Label label1 = new Label();
label1.setText(message);
//form
TextField nameInput = new TextField();
Button loadBbutton = new Button("Upload");
loadBbutton.setOnAction(e -> {
textAnswer = nameInput.getText();
window.close();
});
//Layout
VBox layout = new VBox(10);
layout.setPadding(new Insets(20, 20, 20, 20));
layout.getChildren().addAll(nameInput, loadBbutton);
//Set scene and show in window.
Scene scene = new Scene(layout, 300, 100);
window.setScene(scene);
window.show();
return textAnswer;
}
}
<>在GUI编程中，在考虑基于循环的方法之前，始终考虑事件驱动的方法。while循环只是重复创建控件，向其中一个（按钮）注册侦听器，将控件放置在新窗口中，然后显示窗口。循环不会等待按钮按下后再继续下一次迭代。所以你会有很多窗户 您希望在显示阶段时阻止代码，直到输入有效文件。Stage定义了一个方法，该方法将显示窗口，然后阻止执行，直到窗口被取消。（请注意，这实际上是您应该在FX应用程序线程上调用的唯一阻塞方法。它发挥了一些魔力，确保UI在代码执行被阻塞时保持响应。）因此，一种方法是在循环中调用
showAndWaitwhile(!inputFile.exists()) {
window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle("File was not found.");
window.setMinWidth(250);
window.setMaxHeight(100);
//form
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
//Layout
VBox layout = new VBox(10);
layout.setPadding(new Insets(20, 20, 20, 20));
layout.getChildren().addAll(fileInput, inputButton);
//Set scene and show in window.
Scene scene = new Scene(layout, 300, 100);
window.setScene(scene);
window.showAndWait();
}
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
if (inputFile.exists()) {
window.close();
}
});
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setDisable(true);
fileInput.textProperty().addListener((obs, oldText, newText) ->
inputButton.setDisable( ! new File(newText).exists() ) );
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
if (inputFile.exists()) {
window.close();
}
});
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setDisable(true);
fileInput.textProperty().addListener((obs, oldText, newText) ->
inputButton.setDisable( ! new File(newText).exists() ) );
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.disableProperty().bind(Bindings.createBooleanBinding(
() -> ! new File(fileInput.getText()).exists(),
fileInput.textProperty()));
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
<>和最后一个评论：为了允许用户选择一个文件，您可以考虑在GUI编程中使用（）./P>< P>，在考虑基于循环的方法之前，始终考虑事件驱动的方法。while循环只是重复创建控件，向其中一个（按钮）注册侦听器，将控件放置在新窗口中，然后显示窗口。循环不会等待按钮按下后再继续下一次迭代。所以你会有很多窗户 您希望在显示阶段时阻止代码，直到输入有效文件。Stage定义了一个方法，该方法将显示窗口，然后阻止执行，直到窗口被取消。（请注意，这实际上是您应该在FX应用程序线程上调用的唯一阻塞方法。它发挥了一些魔力，确保UI在代码执行被阻塞时保持响应。）因此，一种方法是在循环中调用
showAndWaitwhile(!inputFile.exists()) {
window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle("File was not found.");
window.setMinWidth(250);
window.setMaxHeight(100);
//form
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
//Layout
VBox layout = new VBox(10);
layout.setPadding(new Insets(20, 20, 20, 20));
layout.getChildren().addAll(fileInput, inputButton);
//Set scene and show in window.
Scene scene = new Scene(layout, 300, 100);
window.setScene(scene);
window.showAndWait();
}
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
if (inputFile.exists()) {
window.close();
}
});
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setDisable(true);
fileInput.textProperty().addListener((obs, oldText, newText) ->
inputButton.setDisable( ! new File(newText).exists() ) );
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
if (inputFile.exists()) {
window.close();
}
});
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.setDisable(true);
fileInput.textProperty().addListener((obs, oldText, newText) ->
inputButton.setDisable( ! new File(newText).exists() ) );
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
TextField fileInput = new TextField();
Button inputButton = new Button("Upload File");
inputButton.disableProperty().bind(Bindings.createBooleanBinding(
() -> ! new File(fileInput.getText()).exists(),
fileInput.textProperty()));
inputButton.setOnAction(e -> {
inputFile = new File(fileInput.getText());
window.close();
});
最后一个注释：为了允许用户选择文件，您可以考虑使用（）.< /P>