我正在嘗試使用可編輯的組合框在用戶的某些擊鍵上從數據庫快速搜索客戶端的功能。我想要的是,用戶會輸入一些字母,如果這些字符串與某些客戶端匹配,這些客戶端將保留在當前的組合框的數據模型中。
代碼如下。 請修復代碼中發生的異常。提前致謝 !!我在此代碼中收到IllegalStateException
異常在線程 「AWT-EventQueue的 - 0」 java.lang.IllegalStateException:嘗試在通知
import java.util.ArrayList;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
class ComboSearch extends JFrame implements CaretListener
{
private JComboBox mycombo;
private ArrayList<String> list;
private DefaultComboBoxModel<String> isolatemodel,model;
public ComboSearch()
{
setSize(400, 400);
setLayout(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
mycombo=new JComboBox();
mycombo.setEditable(true);
mycombo.setBounds(30,30, 350, 50);
isolatemodel=new DefaultComboBoxModel();
model=new DefaultComboBoxModel();
list=new ArrayList();
add(mycombo);
mycombo.setModel(isolatemodel);
((JTextField)mycombo.getEditor()
.getEditorComponent()).addCaretListener(this);
setVisible(true);}
private void addElements()
{
list.add("Rambhau, Vijay Nagar");
list.add("Surya, Ashok Puri");
list.add("Mourya, Shahjapur");
list.add("Kishorji & sons, Bhopal");
list.add("Fablica & jewels, Itanagar");
list.add("Guru Kripa,Ujjain");
list.add("Hariram Nai & Bakes, Indore");
list.add("Ganesh Sev Bhandar, Harda");
list.add("Greatsome Higs, Jabalpur");
list.add("Treks and hains, Nalanda");
list.add("Tata Indora, Hoshangabad");
list.add("Paankhai Seth, Madurai");
list.add("Katappa, Shikara");
list.add("Gunjan Samosa, Vijay Nagar");
list.add("Ramesh hustlers , Vijay Nagar");
}
public void makeModels()
{
addElements();
list.stream().forEach((client) -> {
isolatemodel.addElement(client);
});
}
@Override
public void caretUpdate(CaretEvent e)
{
String searchText=((JTextField)mycombo.getEditor()
.getEditorComponent()).getText();
if(!searchText.isEmpty())
{
for(int i=0; i<isolatemodel.getSize();i++)
{
if(isolatemodel.getElementAt(i).contains(searchText))
{
model.removeAllElements();
model.addElement(isolatemodel.getElementAt(i));
}
}
mycombo.setModel(model);
mycombo.showPopup();
}
else
{
mycombo.setModel(isolatemodel);
}
}
}
public class Execute
{
public static void main(String[] args)
{
ComboSearch searchIt=new ComboSearch();
searchIt.makeModels();
}
}
首先,不要將佈局設置爲null。這只是要求問題。使用[佈局管理器](https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html)而不是 – Jonah
我也遇到一個錯誤,沒有'.contains()'方法這if語句'if(isolatemodel.getElementAt(i).contains(searchText))' – Jonah
我也使用過佈局管理器。它不與那個:( –