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copied!<p>This works perfectly : </p> <pre><code> import java.util.regex.Pattern; import javafx.application.Application; import javafx.beans.binding.Bindings; import javafx.beans.binding.IntegerBinding; import javafx.beans.property.ReadOnlyIntegerProperty; import javafx.beans.property.ReadOnlyIntegerWrapper; import javafx.geometry.Insets; import javafx.scene.Scene; import javafx.scene.control.IndexRange; import javafx.scene.control.Label; import javafx.scene.control.TextField; import javafx.scene.layout.VBox; import javafx.stage.Stage; public class TimeTextFieldTest extends Application { @Override public void start(Stage primaryStage) { VBox root = new VBox(5); root.setPadding(new Insets(5)); Label hrLabel = new Label(); Label minLabel = new Label(); Label secLabel = new Label(); TimeTextField timeTextField = new TimeTextField(); hrLabel.textProperty().bind(Bindings.format("Hours: %d", timeTextField.hoursProperty())); minLabel.textProperty().bind(Bindings.format("Minutes: %d", timeTextField.minutesProperty())); secLabel.textProperty().bind(Bindings.format("Seconds: %d", timeTextField.secondsProperty())); root.getChildren().addAll(timeTextField, hrLabel, minLabel, secLabel); Scene scene = new Scene(root); primaryStage.setScene(scene); primaryStage.show(); } public static void main(String[] args) { launch(args); } public static class TimeTextField extends TextField { enum Unit {HOURS, MINUTES, SECONDS}; private final Pattern timePattern ; private final ReadOnlyIntegerWrapper hours ; private final ReadOnlyIntegerWrapper minutes ; private final ReadOnlyIntegerWrapper seconds ; public TimeTextField() { this("00:00:00"); } public TimeTextField(String time) { super(time); timePattern = Pattern.compile("\\d\\d:\\d\\d:\\d\\d"); if (! validate(time)) { throw new IllegalArgumentException("Invalid time: "+time); } hours = new ReadOnlyIntegerWrapper(this, "hours"); minutes = new ReadOnlyIntegerWrapper(this, "minutes"); seconds = new ReadOnlyIntegerWrapper(this, "seconds"); hours.bind(new TimeTextField.TimeUnitBinding(Unit.HOURS)); minutes.bind(new TimeTextField.TimeUnitBinding(Unit.MINUTES)); seconds.bind(new TimeTextField.TimeUnitBinding(Unit.SECONDS)); } public ReadOnlyIntegerProperty hoursProperty() { return hours.getReadOnlyProperty(); } public int getHours() { return hours.get() ; } public ReadOnlyIntegerProperty minutesProperty() { return minutes.getReadOnlyProperty(); } public int getMinutes() { return minutes.get(); } public ReadOnlyIntegerProperty secondsProperty() { return seconds.getReadOnlyProperty(); } public int getSeconds() { return seconds.get(); } @Override public void appendText(String text) { // Ignore this. Our text is always 8 characters long, we cannot append anything } @Override public boolean deleteNextChar() { boolean success = false ; // If there's a selection, delete it: final IndexRange selection = getSelection(); if (selection.getLength()>0) { int selectionEnd = selection.getEnd(); this.deleteText(selection); this.positionCaret(selectionEnd); success = true ; } else { // If the caret preceeds a digit, replace that digit with a zero and move the caret forward. Else just move the caret forward. int caret = this.getCaretPosition(); if (caret % 3 != 2) { // not preceeding a colon String currentText = this.getText(); setText(currentText.substring(0, caret) + "0" + currentText.substring(caret+1)); success = true ; } this.positionCaret(Math.min(caret+1, this.getText().length())); } return success ; } @Override public boolean deletePreviousChar() { boolean success = false ; // If there's a selection, delete it: final IndexRange selection = getSelection(); if (selection.getLength()>0) { int selectionStart = selection.getStart(); this.deleteText(selection); this.positionCaret(selectionStart); success = true ; } else { // If the caret is after a digit, replace that digit with a zero and move the caret backward. Else just move the caret back. int caret = this.getCaretPosition(); if (caret % 3 != 0) { // not following a colon String currentText = this.getText(); setText(currentText.substring(0, caret-1) + "0" + currentText.substring(caret)); success = true ; } this.positionCaret(Math.max(caret-1, 0)); } return success ; } @Override public void deleteText(IndexRange range) { this.deleteText(range.getStart(), range.getEnd()); } @Override public void deleteText(int begin, int end) { // Replace all digits in the given range with zero: StringBuilder builder = new StringBuilder(this.getText()); for (int c = begin; c<end; c++) { if (c % 3 != 2) { // Not at a colon: builder.replace(c, c+1, "0"); } } this.setText(builder.toString()); } @Override public void insertText(int index, String text) { // Handle an insert by replacing the range from index to index+text.length() with text, if that results in a valid string: StringBuilder builder = new StringBuilder(this.getText()); builder.replace(index, index+text.length(), text); final String testText = builder.toString(); if (validate(testText)) { this.setText(testText); } this.positionCaret(index + text.length()); } @Override public void replaceSelection(String replacement) { final IndexRange selection = this.getSelection(); if (selection.getLength()==0) { this.insertText(selection.getStart(), replacement); } else { this.replaceText(selection.getStart(), selection.getEnd(), replacement); } } @Override public void replaceText(IndexRange range, String text) { this.replaceText(range.getStart(), range.getEnd(), text); } @Override public void replaceText(int begin, int end, String text) { if (begin==end) { this.insertText(begin, text); } else { // only handle this if text.length() is equal to the number of characters being replaced, and if the replacement results in a valid string: if (text.length() == end - begin) { StringBuilder builder = new StringBuilder(this.getText()); builder.replace(begin, end, text); String testText = builder.toString(); if (validate(testText)) { this.setText(testText); } this.positionCaret(end); } } } private boolean validate(String time) { if (! timePattern.matcher(time).matches()) { return false ; } String[] tokens = time.split(":"); assert tokens.length == 3 ; try { int hours = Integer.parseInt(tokens[0]); int mins = Integer.parseInt(tokens[1]); int secs = Integer.parseInt(tokens[2]); if (hours < 0 || hours > 23) { return false ; } if (mins < 0 || mins > 59) { return false ; } if (secs < 0 || secs > 59) { return false ; } return true ; } catch (NumberFormatException nfe) { // regex matching should assure we never reach this catch block assert false ; return false ; } } private final class TimeUnitBinding extends IntegerBinding { final Unit unit ; TimeUnitBinding(Unit unit) { this.bind(textProperty()); this.unit = unit ; } @Override protected int computeValue() { // Crazy enum magic String token = getText().split(":")[unit.ordinal()]; return Integer.parseInt(token); } } } } </code></pre>

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