所以我创建了一个效果很好的工具。该程序的目的基本上是
按钮cardButton =新按钮（“新手”）；
被按下/激活，将显示一组随机生成的图像。我可以运行该程序并轻松按相应按钮20-30次，但迟早我会收到以下错误消息：
线程“ JavaFX Application Thread”中的异常 java.lang.NullPointerException：输入流不能为null javafx.graphics/javafx.scene.image.Image.validateInputStream(Image.java:1117） 在javafx.graphics/javafx.scene.image.Image。（Image.java:701） 在sample.Main.lambda $ start $ 2（Main.java:162）
实际上，此错误消息的时间更长，但这是前3行。我已经阅读了其他一些具有相同问题的线程，但是仍然无法解决。我经常读到有关制作URL图像路径的信息，但我尝试过的所有操作均无济于事。
还有其他想法吗？ Main.java:162是行
Image flopTwo = new Image(input11);
在下面的代码中。
package sample;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.geometry.HPos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
import java.io.InputStream;
public class Main extends Application{
private Label potsizeLabel;
private Label stacksizeLabel;
private Label betsizeLabel;
private Potsize potsize;
private Potsize betsize;
private Potsize stacksize;
private int potSizeValue;
private int betSizeValue;
private int stackSizeValue;
private void initPot() {
MyMath stacks = new MyMath();
potSizeValue = stacks.createPot();
betSizeValue = stacks.createBet();
stackSizeValue = stacks.createStack();
potsize = new Potsize(potSizeValue);
betsize = new Potsize(betSizeValue);
stacksize = new Potsize(stackSizeValue);
potsizeLabel.setText(potsize.toString()+"$");
stacksizeLabel.setText(stacksize.toString()+"$");
betsizeLabel.setText(betsize.toString()+"$");
}
@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Pot Odds Trainer");
Class<?> genericClass = this.getClass();
InputStream input2 = genericClass.getResourceAsStream("/sample/img/chipsREDsmall.png");
InputStream input5 = genericClass.getResourceAsStream("/sample/img/chipsBLUEstack.png");
InputStream input6 = genericClass.getResourceAsStream("/sample/img/chipsGREENstack.png");
InputStream input13 = genericClass.getResourceAsStream("/sample/img/cardback.png");
InputStream input14 = genericClass.getResourceAsStream("/sample/img/cardback.png");
InputStream input15 = genericClass.getResourceAsStream("/sample/img/cardback.png");
InputStream input16 = genericClass.getResourceAsStream("/sample/img/cardback.png");
InputStream input17 = genericClass.getResourceAsStream("/sample/img/cardback.png");
InputStream input18 = genericClass.getResourceAsStream("/sample/img/cardback02.png");
InputStream input19 = genericClass.getResourceAsStream("/sample/img/cardback02.png");
Image image2 = new Image(input2);
ImageView redChips = new ImageView(image2);
Image image5 = new Image(input5);
ImageView blueChipsStack = new ImageView(image5);
Image image6 = new Image(input6);
ImageView greenChipStack = new ImageView(image6);
Image image15 = new Image(input15);
ImageView cardback01 = new ImageView(image15);
Image image16 = new Image(input16);
ImageView cardback02 = new ImageView(image16);
Image image17 = new Image(input17);
ImageView cardback03 = new ImageView(image17);
Image turnRiver= new Image(input13);
ImageView turnFlop = new ImageView(turnRiver);
Image flopRiver= new Image(input14);
ImageView riverFlop = new ImageView(flopRiver);
Image handBack01= new Image(input18);
ImageView cardBack04 = new ImageView(handBack01);
Image handBack02= new Image(input19);
ImageView cardBack05 = new ImageView(handBack02);
GridPane gridPane = new GridPane();
gridPane.setHgap(10);
gridPane.setVgap(10);
gridPane.setGridLinesVisible(false);
Label potsizeText = new Label("Current Potsize: ");
Label betsizeText = new Label("Amount to call: ");
Label stacksizeText = new Label("Current Stacksize: ");
Label potOddsLabel = new Label("Pot Odds:");
Label textNotify = new Label();
TextField insertText = new TextField();
insertText.setMaxWidth(50);
// Submit Button.
Button submitButton = new Button("Submit");
submitButton.setOnAction(e ->
{
textNotify.setText(MyMath.checkOdds(insertText.getText(), (double) betSizeValue / (potSizeValue + betSizeValue)));
}
);
Button cardButton = new Button("New Hand");
Button flopButton = new Button("New Flop");
// Restart Button.
Button restartButton = new Button("New Pot");
restartButton.setOnAction((ActionEvent event) -> {
textNotify.setText("");
initPot();
});
potsizeLabel = new Label();
stacksizeLabel = new Label();
betsizeLabel = new Label();
gridPane.add(potsizeText, 4, 7, 2, 1);
gridPane.add(betsizeText, 4, 8, 2, 1);
gridPane.add(stacksizeText, 4, 9, 2, 1);
gridPane.add(potsizeLabel, 5, 7, 2, 1);
gridPane.add(betsizeLabel, 5, 8, 2, 1);
gridPane.add(stacksizeLabel, 5, 9, 2, 1);
// Chipstacks for the stack sizes.
gridPane.add(blueChipsStack, 5, 7, 1, 1);
gridPane.add(redChips, 5, 8, 1, 1);
gridPane.add(greenChipStack, 5, 9, 1, 1);
gridPane.add(potOddsLabel, 4, 12, 4, 1);
gridPane.add(insertText, 5, 12, 2, 1);
gridPane.add(textNotify, 4, 15, 3, 1);
// Buttons.
gridPane.add(restartButton, 4, 13, 1, 1);
gridPane.add(submitButton, 5, 12, 1, 1);
gridPane.add(cardButton, 10, 5, 4, 1);
gridPane.add(flopButton, 4, 5, 4, 1);
// Board for the five board cards.
gridPane.add(cardback01, 4, 4, 1, 1);
gridPane.add(cardback02, 5, 4, 1, 1);
gridPane.add(cardback03, 6, 4, 1, 1);
gridPane.add(turnFlop, 7, 4, 1, 1);
gridPane.add(riverFlop, 8, 4, 1, 1);
// Board for the two hand cards.
gridPane.add(cardBack04, 10, 4, 2, 1);
gridPane.add(cardBack05, 12, 4, 2, 1);
// Flop Button.
flopButton.setOnAction(e ->
{
Card card = new Card();
InputStream input10 = genericClass.getResourceAsStream("/sample/img/" +card.getFirstBoardRanks() + card.getFirstBoardSuits() + ".png");
Image flopOne = new Image(input10);
ImageView firstFlop = new ImageView(flopOne);
gridPane.add(firstFlop, 4, 4, 1, 1);
InputStream input11 = genericClass.getResourceAsStream("/sample/img/" +card.getFirstBoardRanks() + card.getFirstBoardSuits() + ".png");
Image flopTwo = new Image(input11);
ImageView secondFlop = new ImageView(flopTwo);
gridPane.add(secondFlop, 5, 4, 2, 1);
InputStream input12 = genericClass.getResourceAsStream("/sample/img/" +card.getFirstBoardRanks() + card.getFirstBoardSuits() + ".png");
Image flopThree = new Image(input12);
ImageView thirdFlop = new ImageView(flopThree);
gridPane.add(thirdFlop, 6, 4, 1, 1);
}
);
// Hand Button.
cardButton.setOnAction(e ->
{
Card card = new Card();
String rank = card.getFirstBoardRanks();
String suit = card.getFirstBoardSuits();
// System.out.println("Neue Karte: " + rank + " " + suit);
InputStream input8 = genericClass.getResourceAsStream("img/" +card.getFirstBoardRanks() + card.getFirstBoardSuits() + ".png");
Image handCardOne = new Image(input8);
ImageView firstHand = new ImageView(handCardOne);
gridPane.add(firstHand, 10, 4, 2, 1);
InputStream input9 = genericClass.getResourceAsStream("img/" +card.getFirstBoardRanks() + card.getFirstBoardSuits() + ".png");
Image handCardTwo = new Image(input9);
ImageView secondHand = new ImageView(handCardTwo);
gridPane.add(secondHand, 12, 4, 2, 1);
}
);
GridPane.setHalignment(blueChipsStack, HPos.RIGHT);
GridPane.setHalignment(redChips, HPos.RIGHT);
GridPane.setHalignment(greenChipStack, HPos.RIGHT);
GridPane.setHalignment(submitButton, HPos.RIGHT);
Scene scene = new Scene(gridPane, 1250, 675);
scene.getStylesheets().add(Main.class.getResource("css/styles.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
}
}