JavaFX中的自动完成组合框

我找到了一个对我有用的解决方案：

public class AutoCompleteComboBoxListener<T> implements EventHandler<KeyEvent> {    private ComboBox comboBox;    private StringBuilder sb;    private ObservableList<T> data;    private boolean moveCaretToPos = false;    private int caretPos;    public AutoCompleteComboBoxListener(final ComboBox comboBox) {        this.comboBox = comboBox;        sb = new StringBuilder();        data = comboBox.getItems();        this.comboBox.setEditable(true);        this.comboBox.setonKeyPressed(new EventHandler<KeyEvent>() { @Override public void handle(KeyEvent t) {     comboBox.hide(); }        });        this.comboBox.setonKeyReleased(AutoCompleteComboBoxListener.this);    }    @Override    public void handle(KeyEvent event) {        if(event.getCode() == KeyCode.UP) { caretPos = -1; moveCaret(comboBox.getEditor().getText().length()); return;        } else if(event.getCode() == KeyCode.DOWN) { if(!comboBox.isShowing()) {     comboBox.show(); } caretPos = -1; moveCaret(comboBox.getEditor().getText().length()); return;        } else if(event.getCode() == KeyCode.BACK_SPACE) { moveCaretToPos = true; caretPos = comboBox.getEditor().getCaretPosition();        } else if(event.getCode() == KeyCode.DELETE) { moveCaretToPos = true; caretPos = comboBox.getEditor().getCaretPosition();        }        if (event.getCode() == KeyCode.RIGHT || event.getCode() == KeyCode.LEFT     || event.isControlDown() || event.getCode() == KeyCode.HOME     || event.getCode() == KeyCode.END || event.getCode() == KeyCode.TAB) { return;        }        ObservableList list = FXCollections.observableArrayList();        for (int i=0; i<data.size(); i++) { if(data.get(i).toString().toLowerCase().startsWith(     AutoCompleteComboBoxListener.this.comboBox     .getEditor().getText().toLowerCase())) {     list.add(data.get(i)); }        }        String t = comboBox.getEditor().getText();        comboBox.setItems(list);        comboBox.getEditor().setText(t);        if(!moveCaretToPos) { caretPos = -1;        }        moveCaret(t.length());        if(!list.isEmpty()) { comboBox.show();        }    }    private void moveCaret(int textLength) {        if(caretPos == -1) { comboBox.getEditor().positionCaret(textLength);        } else { comboBox.getEditor().positionCaret(caretPos);        }        moveCaretToPos = false;    }}

你可以用

new AutoCompleteComboBoxListener<>(comboBox);

基于此，我根据自己的需要对其进行了自定义。

随时使用它，如果有人可以改进它，请告诉我。