以下解决方案的基础是每次调用时都要调整d出窗口的大小
searchAndListRoutine。您需要考虑的是，当d出窗口显示在父框架的边界之外时，该d出窗口可以显示在其自己的窗口中，或者可以将其显示在父框架的分层窗格中：
import java.awt.*;import java.awt.event.*;import java.util.ArrayList;import java.util.Vector;import javax.swing.*;import javax.swing.border.*;import javax.swing.event.*;import javax.swing.plaf.basic.*;import javax.swing.plaf.metal.*;import javax.swing.plaf.basic.*;public class JIntelligentComboBox extends JComboBox { private ArrayList<Object> itemBackup = new ArrayList<Object>(); private void init(){ class searchComboBoxEditor extends BasicComboBoxEditor { public searchComboBoxEditor(){ super(); } @Override public void setItem(Object anObject){ if (anObject == null) { super.setItem(anObject); } else { Object[] o = (Object[]) anObject; super.setItem(o[0]); } } @Override public Object getItem(){ return new Object[]{super.getItem(), super.getItem(), 0}; } } this.setEditor(new searchComboBoxEditor()); this.setEditable(true); class searchRenderer extends BasicComboBoxRenderer { public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus){ if (index == 0) { setText(""); this.setPreferredSize(new Dimension(1, 1)); return this; } this.setPreferredSize(new Dimension(160, 17)); if (index == list.getModel().getSize() - 1) { this.setBorder(new EmptyBorder(0, 3, 1, 3)); } else { this.setBorder(new EmptyBorder(0, 3, 0, 3)); } Object[] v = (Object[]) value; //System.out.println(v[0]); this.setFont(new Font("Arial", Font.PLAIN, 12)); this.setBackground(Color.white); String s = (String) v[0]; String lowerS = s.toLowerCase(); String sf = (String) v[1]; String lowerSf = sf.toLowerCase(); ArrayList<String> notMatching = new ArrayList<String>(); if (!sf.equals("")){ int fs = -1; int lastFs = 0; while ((fs = lowerS.indexOf((String) lowerSf, (lastFs == 0) ? -1 : lastFs)) > -1) { notMatching.add(s.substring(lastFs, fs)); lastFs = fs + sf.length(); //System.out.println(fs+sf.length()); } notMatching.add(s.substring(lastFs)); //System.out.println(notMatching); } String html = ""; if (notMatching.size() > 1) { html = notMatching.get(0); int start = html.length(); int sfl = sf.length(); for (int i = 1; i < notMatching.size(); i++) { String t = notMatching.get(i); html += "<b style="color: black;">" + s.substring(start, start + sfl) + "</b>" + t; start += sfl + t.length(); } } this.setText("<html><head></head><body style="color: gray;">" + html + "</body></head>"); return this; } } this.setRenderer(new searchRenderer()); // int size = this.getModel().getSize(); Object[] tmp = new Object[this.getModel().getSize()]; for (int i = 0; i < size; i++) { tmp[i] = this.getModel().getElementAt(i); itemBackup.add(tmp[i]); } this.removeAllItems(); this.getModel().addElement(new Object[]{"", "", 0}); for (int i = 0; i < tmp.length; i++) { this.getModel().addElement(tmp[i]); } // this.getEditor().getEditorComponent().addKeyListener(new KeyListener() { @Override public void keyPressed(KeyEvent e) { // TODO Auto-generated method stub } @Override public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub searchAndListEntries(((JTextField)JIntelligentComboBox.this.getEditor().getEditorComponent()).getText()); //System.out.println(((JTextField)JIntelligentComboBox.this.getEditor().getEditorComponent()).getText()); } @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub } }); } public JIntelligentComboBox(){ super(); } public JIntelligentComboBox(MutableComboBoxModel aModel){ super(aModel); init(); } public JIntelligentComboBox(Object[] items){ super(items); init(); } public JIntelligentComboBox(Vector<?> items){ super(items); init(); } @Override public MutableComboBoxModel getModel(){ return (MutableComboBoxModel) super.getModel(); } private void searchAndListEntries(Object searchFor){ ArrayList<Object> found = new ArrayList<Object>(); //System.out.println("sf: "+searchFor); for (int i = 0; i < this.itemBackup.size(); i++) { Object tmp = this.itemBackup.get(i); if (tmp == null || searchFor == null) continue; Object[] o = (Object[]) tmp; String s = (String) o[0]; if (s.matches("(?i).*" + searchFor + ".*")){ found.add(new Object[]{((Object[])tmp)[0], searchFor, ((Object[])tmp)[2]}); } } this.removeAllItems(); this.getModel().addElement(new Object[] {searchFor, searchFor, 0}); for (int i = 0; i < found.size(); i++) { this.getModel().addElement(found.get(i)); } //this.setPopupVisible(true); int size = this.getModel().getSize() - 1; System.out.println("Elements: " + size); if (size == 0) { this.setPopupVisible( false ); return; } this.setPopupVisible(true); BasicComboPopup popup = (BasicComboPopup)this.getAccessibleContext().getAccessibleChild(0); Window popupWindow = SwingUtilities.windowForComponent(popup); Window comboWindow = SwingUtilities.windowForComponent(this); if (comboWindow.equals(popupWindow)) { Component c = popup.getParent(); Dimension d = c.getPreferredSize(); c.setSize(d); } else { popupWindow.pack(); } }}一个问题是，当组合框字段为空时，模型包含4个条目。我想这与您的匹配逻辑有关。
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