AutoComplete修飾器

Question

我在Swing應用程序中實現了autocompleteDecorator。我的代碼是這樣的。

public inventory_purchase() { 
    initComponents(); 
    AutoCompleteDecorator.decorate(this.combo); 
} 

public void autocomplete(){ 
    try{ 
     Class.forName("org.apache.derby.jdbc.ClientDriver"); 
     Connection conn= DriverManager.getConnection("jdbc:derby://localhost:1527/C:/jpublisher/pub", "APP", "app"); 
     Statement stmt = conn.createStatement(); 
     String query="SELECT * FROM INVENTORY"; 
     ResultSet rs = stmt.executeQuery(query); 
     while(rs.next()){ 
      combo.addItem(rs.getString("CATEGORY")); 
     } 
    } 
    catch (ClassNotFoundException | SQLException ex) { 
     JOptionPane.showMessageDialog(null, "Data cannot be loaded. Error!!"); 
    } 

} 

這個自動完成裝飾工程，只有當我稱之爲

formWindowOpened(java.awt.event.WindowEvent evt){autocomplete();} 

此功能如何使用這個自動完成一鍵收聽？像：

private void comboKeyReleased(java.awt.event.KeyEvent evt) { 
    autocomplete(); 
} 

是否有任何其他簡單的過程來使用從數據庫的自動完成？

Answer 1

您可能想要使用Key Bindings。這裏有一個簡單的例子：

import java.awt.event.*; 
import javax.swing.*; 

public class KeyBindings extends Box{ 
    public KeyBindings(){ 
     super(BoxLayout.Y_AXIS); 

     final JLabel text = new JLabel("Original Text"); 
     add(text); 

     Action action = new AbstractAction() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       text.setText("New Text"); 
      }}; 
     String keyStrokeAndKey = "control H"; 
     KeyStroke keyStroke = KeyStroke.getKeyStroke(keyStrokeAndKey); 
     getInputMap().put(keyStroke, keyStrokeAndKey); 
     getActionMap().put(keyStrokeAndKey, action); 
    } 


    public static void main(String[] args) { 
     JFrame frame = new JFrame(); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setContentPane(new KeyBindings()); 
     frame.pack(); 
     frame.setVisible(true); 
    } 
}