Java Swing 自动补全下拉框

reasons： 是从服务器一次拉取全部不重复的过往的填写记录

public class ComboxKeyAdapter extends KeyAdapter{

public List reasons;

public  ComboxKeyAdapter(List reasons){

this.reasons = reasons;

}

@Override

public void keyReleased(KeyEvent e){

ComboBoxEditor editor = comboBox.getEditor();

JTextField textField = (JTextField)editor.getEditorComponent();

List result  =  new ArrayList();

String objStr = textField.getText();

if(objStr!="" && !objStr.equals("")){

for(PriceChangeReason res : reasons){

if(objStr.equals(res.getMemo())

|| res.getMemo().contains(objStr)

|| res.getMemo().startsWith(objStr)

|| res.getMemo().endsWith(objStr)){

result.add(res);

}

}

String[] memos;

if(result.size() > 0){

comboBox.hidePopup();

comboBox.removeAllItems();

memos = new String[result.size()];

for(int i = 0; i < result.size();i++){

PriceChangeReason reason  = result.get(i);

memos[i] = reason.getMemo();

comboBox.addItem(reason.getMemo());

}

comboBox.setSelectedItem(objStr);

comboBox.showPopup();

}

}else{

comboBox.hidePopup();

comboBox.removeAllItems();

for(int i = 0; i < reasons.size();i++){

PriceChangeReason reason  = reasons.get(i);

comboBox.addItem(reason.getMemo());

}

comboBox.setSelectedItem("");

comboBox.showPopup();

}

}

}