这是我第一次使用JavaFX和TableView。我有一个应用程序，用户输入高尔夫分数，为他们生成差点值。
我有一个ArrayList，我用作我的＆＃34;数据库＆＃34;：
public ArrayList<Score> scoreDB = new ArrayList<>();
将此作为添加值的方法：
public static Score scoreSubmit(DatePicker roundDate, TextField courseName, TextField courseRating, TextField courseSlope, TextField score)
{
Score temp = new Score();
//Wanted to use own Date class, must use this roundabout way to set the date correctly
LocalDate tempDate = roundDate.getValue();
temp.setRoundDate(tempDate.getMonthValue(), tempDate.getDayOfMonth(), tempDate.getYear());
temp.setCourseName(courseName.getText());
temp.setCourseRating(Double.valueOf(courseRating.getText()));
temp.setCourseSlope(Double.valueOf(courseSlope.getText()));
temp.setScore(Double.valueOf(score.getText()));
return temp;
}
注意：我使用了自己创建的日期类。
我已经检查过该方法是否确实有效并且ArrayList确实收到了值。
这是我对TableView的构造：
//Table columns
//Creating columns and setting the display to call the values from Score class
TableColumn<Score, String> courseNameColumn = new TableColumn<>("Course Name");
courseNameColumn.setMinWidth(100);
courseNameColumn.setCellValueFactory(new PropertyValueFactory<>("courseName"));
TableColumn<Score, Date> dateColumn = new TableColumn<>("Date");
dateColumn.setMinWidth(100);
dateColumn.setCellValueFactory(new PropertyValueFactory<>("roundDate"));
TableColumn<Score, Double> scoreColumn = new TableColumn<>("Score");
scoreColumn.setMinWidth(100);
scoreColumn.setCellValueFactory(new PropertyValueFactory<>("score"));
//This adds rating and slope under one column
TableColumn courseDataColumn = new TableColumn("Course Data");
TableColumn<Score, Double> courseRatingColumn = new TableColumn<>("Course Rating");
TableColumn<Score, Double> courseSlopeColumn = new TableColumn<>("Course Slope");
courseDataColumn.getColumns().addAll(courseRatingColumn, courseSlopeColumn);
courseDataColumn.setMinWidth(100);
courseRatingColumn.setCellValueFactory(new PropertyValueFactory<>("courseRating"));
courseSlopeColumn.setCellValueFactory(new PropertyValueFactory<>("courseSlope"));
scoreTable.getColumns().addAll(courseNameColumn, dateColumn, scoreColumn, courseDataColumn);
displayLayout.setCenter(displaySP);
displaySP.setBackground(new Background(new BackgroundFill(Paint.valueOf("#006400"), CornerRadii.EMPTY, Insets.EMPTY)));
displaySP.getChildren().add(scoreTable);
displayLayout.setBottom(displayHbox);
scoreTable.setItems(addScore());
以下是我的分数类中的变量：
private double score = 0.0;
private double courseRating = 0.0;
private double courseSlope = 0.0;
private String courseName = "";
private Date roundDate;
以下是我的得分类吸气剂（我已经读过这些必须以某种方式命名才能起作用）：
public double getScore()
{
return score;
}
public String getCourseName()
{
return courseName;
}
public Double getCourseSlope()
{
return courseSlope;
}
public double getCourseRating()
{
return courseRating;
}
public Date getRoundDate()
{
return roundDate;
}
以下是返回可观察列表的方法：
public ObservableList<Score> addScore()
{
ObservableList<Score> scores = FXCollections.observableArrayList();
// scores.add(new Score());
for (int i = 0; i < scoreDB.size(); i++)
{
scores.add(scoreDB.get(i));
}
return scores;
}
如果仅使用已注释的新Score（），则表格将使用此默认分数填充。使用for循环时，不会填充任何内容。
非常感谢任何帮助。
答案 0 :(得分：0)
对于初学者，你应该注意你的模型（Score类）。使用Properties很好（但不一定）。这样做的原因是您可以编辑值，更改将自动反映在视图中（TableView）。否则，如果对已添加的数据进行任何更改，则需要手动更新它，因为PropertyValueFactory将生成只读属性。
public class Score {
private DoubleProperty score = new SimpleDoubleProperty(0.0);
private DoubleProperty courseRating = new SimpleDoubleProperty(0.0);
private DoubleProperty courseSlope = new SimpleDoubleProperty(0.0);
private StringProperty courseName = new SimpleStringProperty("");
private ObjectProperty<LocalDate> roundDate = new SimpleObjectProperty<>();
public double getScore() {
return score.get();
}
public DoubleProperty scoreProperty() {
return score;
}
public void setScore(double score) {
this.score.set(score);
}
public double getCourseRating() {
return courseRating.get();
}
public DoubleProperty courseRatingProperty() {
return courseRating;
}
public void setCourseRating(double courseRating) {
this.courseRating.set(courseRating);
}
public double getCourseSlope() {
return courseSlope.get();
}
public DoubleProperty courseSlopeProperty() {
return courseSlope;
}
public void setCourseSlope(double courseSlope) {
this.courseSlope.set(courseSlope);
}
public String getCourseName() {
return courseName.get();
}
public StringProperty courseNameProperty() {
return courseName;
}
public void setCourseName(String courseName) {
this.courseName.set(courseName);
}
public LocalDate getRoundDate() {
return roundDate.get();
}
public ObjectProperty<LocalDate> roundDateProperty() {
return roundDate;
}
public void setRoundDate(LocalDate roundDate) {
this.roundDate.set(roundDate);
}
}
您还必须更改您的＆＃34;数据库＆＃34;。您必须使用Observable集合而不是普通List。这将允许您直接向其添加数据，它们将自动显示在表
public ObservableList<Score> scoreDB = FXCollections.observableArrayList();
...
//scoreTable.setItems(addScore());
scoreTable.setItems(scoreDB);
...
public void scoreSubmit() {
Score temp = new Score();
temp.setRoundDate(roundDate.getValue());
temp.setCourseName(courseName.getText());
temp.setCourseRating(Double.valueOf(courseRating.getText()));
temp.setCourseSlope(Double.valueOf(courseSlope.getText()));
temp.setScore(Double.valueOf(score.getText()));
scoreDB.add(temp);
}
<强>更新
这是一个使用几乎所有结构的工作示例。数据输入不堪重负，因为NumberFormatException来电，您可能会收到Double#valueOf。为避免此问题，最好使用TextFormatter
public class Main extends Application {
private DatePicker roundDate = new DatePicker();
private TextField courseName = new TextField();
private TextField courseRating = new TextField();
private TextField courseSlope = new TextField();
private TextField score = new TextField();
private TableView<Score> scoreTable = new TableView<>();
public ObservableList<Score> scoreDB = FXCollections.observableArrayList();
@Override
public void start(Stage primaryStage) throws Exception{
//Table columns
//Creating columns and setting the display to call the values from Score class
TableColumn<Score, String> courseNameColumn = new TableColumn<>("Course Name");
courseNameColumn.setMinWidth(100);
courseNameColumn.setCellValueFactory(new PropertyValueFactory<>("courseName"));
TableColumn<Score, LocalDate> dateColumn = new TableColumn<>("Date");
dateColumn.setMinWidth(100);
dateColumn.setCellValueFactory(new PropertyValueFactory<>("roundDate"));
TableColumn<Score, Double> scoreColumn = new TableColumn<>("Score");
scoreColumn.setMinWidth(100);
scoreColumn.setCellValueFactory(new PropertyValueFactory<>("score"));
//This adds rating and slope under one column
TableColumn courseDataColumn = new TableColumn("Course Data");
TableColumn<Score, Double> courseRatingColumn = new TableColumn<>("Course Rating");
TableColumn<Score, Double> courseSlopeColumn = new TableColumn<>("Course Slope");
courseDataColumn.getColumns().addAll(courseRatingColumn, courseSlopeColumn);
courseDataColumn.setMinWidth(100);
courseRatingColumn.setCellValueFactory(new PropertyValueFactory<>("courseRating"));
courseSlopeColumn.setCellValueFactory(new PropertyValueFactory<>("courseSlope"));
scoreTable.getColumns().addAll(courseNameColumn, dateColumn, scoreColumn, courseDataColumn);
scoreTable.setItems(scoreDB);
Button addButton = new Button("Add");
addButton.setOnAction(e -> scoreSubmit());
HBox displayHbox = new HBox();
displayHbox.setSpacing(5);
displayHbox.getChildren().addAll(roundDate, courseName, courseRating, courseSlope, score, addButton);
BorderPane displayLayout = new BorderPane();
displayLayout.setCenter(scoreTable);
displayLayout.setBottom(displayHbox);
primaryStage.setScene(new Scene(displayLayout));
primaryStage.show();
}
public void scoreSubmit() {
Score temp = new Score();
temp.setRoundDate(roundDate.getValue());
temp.setCourseName(courseName.getText());
temp.setCourseRating(Double.valueOf(courseRating.getText()));
temp.setCourseSlope(Double.valueOf(courseSlope.getText()));
temp.setScore(Double.valueOf(score.getText()));
scoreDB.add(temp);
}
public static void main(String[] args) {
launch(args);
}
}
答案 1 :(得分：0)
我不确定我做了什么，但我好像修好了。这是我的scoreSubmit（）方法实现：
//Submit Button for score scene, implements method for setting Score Class variables
Button scoreSubmit = GHINAppMethods.submitButton();
scoreSubmit.defaultButtonProperty().bind(nameInput.focusedProperty());
scoreSubmit.setOnAction(e ->
{
//checks to make sure values are correct
switch (GHINAppMethods.checkScoreValues(courseRating, courseSlope, score))
{
//all values valid
case 0:
{
//adds score to a "database" that will eventually be used in ScoreHistory class
scoreDB.add(GHINAppMethods.scoreSubmit(roundDateTest, courseName, courseRating, courseSlope, score));
//ScoreIterator has no use at this point
System.out.println(scoreDB.get(scoreIterator));
scoreIterator++;
System.out.println(scoreIterator);
System.out.println(scoreDB.size());
GHINAppMethods.addAnotherScore(scoreTextFields, clearAll, displayScene, entryWindow, scoreTable, scores);
break;
}
//rating invalid
case 1:
{
courseRating.clear();
GHINAppMethods.ratingInvalid();
break;
}
//slope invalid
case 2:
{
courseSlope.clear();
GHINAppMethods.slopeInvalid();
break;
}
//score invalid
case 3:
{
score.clear();
GHINAppMethods.scoreInvalid();
break;
}
//Fatal System Error (shouldn't be used)
default:
{
GHINAppMethods.fatalError();
System.out.println("fatal error");
System.exit(0);
break;
}
}
});
checkScoreValues（）方法只是检查以确保值是正确的（我仍然错过了异常但它有帮助）。 checkScoreValues返回一个int，并且switch语句将执行。 scoreDB.add（...）和addAnotherScore（）是唯一实际使用的方法。其他用于错误检查。