import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; import java.util.Vector; import java.util.ArrayList; import java.util.List;public class Combo extends PlainDocument { JComboBox comboBox; static JComboBox recombo; ComboBoxModel model; JTextComponent editor; // flag to indicate if setSelectedItem has been called // subsequent calls to remove/insertString should be ignored boolean selecting = false; public Combo(final JComboBox comboBox) { this.comboBox = comboBox; model = comboBox.getModel(); editor = (JTextComponent) comboBox.getEditor().getEditorComponent(); editor.setDocument(this); comboBox.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (!selecting) highlightCompletedText(0); } }); editor.addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent e) { if (comboBox.isDisplayable()) comboBox.setPopupVisible(true); } }); // Handle initially selected object Object selected = comboBox.getSelectedItem(); if (selected != null) setText(selected.toString()); highlightCompletedText(0); } public void remove(int offs, int len) throws BadLocationException { // return immediately when selecting an item if (selecting)return; super.remove(offs, len); } public void insertString(int offs, String str, AttributeSet a) throws BadLocationException { // return immediately when selecting an item if (selecting)return; // insert the string into the document super.insertString(offs, str, a); // lookup and select a matching item Object item = lookupItem(getText(0, getLength())); if (item != null) { setSelectedItem(item); } else { // keep old item selected if there is no match item = comboBox.getSelectedItem(); // imitate no insert (later on offs will be incremented by str.length(): selection won't move forward) offs = offs - str.length(); // provide feedback to the user that his input has been received but can not be accepted comboBox.getToolkit().beep(); // when available use: UIManager.getLookAndFeel().provideErrorFeedback(comboBox); } setText(item.toString()); // select the completed part highlightCompletedText(offs + str.length()); } private void setText(String text) { try { // remove all text and insert the completed string super.remove(0, getLength()); super.insertString(0, text, null); } catch (BadLocationException e) { throw new RuntimeException(e.toString()); } } private void highlightCompletedText(int start) { editor.setCaretPosition(getLength()); editor.moveCaretPosition(start); } private void setSelectedItem(Object item) { selecting = true; model.setSelectedItem(item); selecting = false; } private Object lookupItem(String pattern) { Object selectedItem = model.getSelectedItem(); // only search for a different item if the currently selected does not match if (selectedItem != null && startsWithIgnoreCase(selectedItem.toString(), pattern)) { return selectedItem; } else { // iterate over all items for (int i = 0, n = model.getSize(); i < n; i++) { Object currentItem = model.getElementAt(i); // current item starts with the pattern? if (startsWithIgnoreCase(currentItem.toString(), pattern)) { return currentItem; } } } // no item starts with the pattern => return null return null; } // checks if str1 starts with str2 - ignores case private boolean startsWithIgnoreCase(String str1, String str2) { return str1.toUpperCase().startsWith(str2.toUpperCase()); } private static JComboBox createAndShowGUI(JComboBox combo) { // the combo box (add/modify items if you like to) // JComboBox comboBox1 = new JComboBox(new Object[] {"Ester", "大连", "大庆", "大大", // "ab", "abc", "abcd", "asdfsdf", "dgdfg", // "uhkg", "e56trstfg", "xcvxvb", "Jordi", // "Jordina", "Jorge", "Sergi"}); // has to be editable List list = new ArrayList(); for (int i = 0; i < combo.getItemCount(); i++) { list.add(combo.getItemAt(i)); } for (int i = 0; i < list.size(); i++) { for (int j = 0; j < list.size() - i - 1; j++) if ( ( ( (String) list.get(j)).compareToIgnoreCase( (String) list.get(j + 1))) > 0) { String a = (String) list.get(j); String b = (String) list.get(j + 1); String c; c = a; a = b; b = c; list.set(j, a); list.set(j + 1, b); } } Object[] array = list.toArray(); JComboBox comboBox = new JComboBox(array); comboBox.setEditable(true); // change the editor's document new Combo(comboBox); return comboBox; // create and show a window containing the combo box // JFrame frame = new JFrame(); // frame.setDefaultCloseOperation(3); // frame.getContentPane().add(comboBox); // frame.pack(); frame.setVisible(true); } //ComboBox调用 public static JComboBox creatCombo(final JComboBox combo) {// javax.swing.SwingUtilities.invokeLater(new Runnable() { // public void run() { recombo = new JComboBox(); recombo = createAndShowGUI(combo); // } // }); return recombo; } }
import java.awt.event.*; import javax.swing.*; import javax.swing.text.*;public class S11InitialSelection extends PlainDocument { JComboBox comboBox; ComboBoxModel model; JTextComponent editor; // flag to indicate if setSelectedItem has been called // subsequent calls to remove/insertString should be ignored boolean selecting=false; public S11InitialSelection(final JComboBox comboBox) { this.comboBox = comboBox; model = comboBox.getModel(); editor = (JTextComponent) comboBox.getEditor().getEditorComponent(); editor.setDocument(this); comboBox.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (!selecting) highlightCompletedText(0); } }); editor.addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent e) { if (comboBox.isDisplayable()) comboBox.setPopupVisible(true); } }); // Handle initially selected object Object selected = comboBox.getSelectedItem(); if (selected!=null) setText(selected.toString()); highlightCompletedText(0); } public void remove(int offs, int len) throws BadLocationException { // return immediately when selecting an item if (selecting) return; super.remove(offs, len); } public void insertString(int offs, String str, AttributeSet a) throws BadLocationException { // return immediately when selecting an item if (selecting) return; // insert the string into the document super.insertString(offs, str, a); // lookup and select a matching item Object item = lookupItem(getText(0, getLength())); if (item != null) { setSelectedItem(item); } else { // keep old item selected if there is no match item = comboBox.getSelectedItem(); // imitate no insert (later on offs will be incremented by str.length(): selection won't move forward) offs = offs-str.length(); // provide feedback to the user that his input has been received but can not be accepted comboBox.getToolkit().beep(); // when available use: UIManager.getLookAndFeel().provideErrorFeedback(comboBox); } setText(item.toString()); // select the completed part highlightCompletedText(offs+str.length()); } private void setText(String text) { try { // remove all text and insert the completed string super.remove(0, getLength()); super.insertString(0, text, null); } catch (BadLocationException e) { throw new RuntimeException(e.toString()); } } private void highlightCompletedText(int start) { editor.setCaretPosition(getLength()); editor.moveCaretPosition(start); } private void setSelectedItem(Object item) { selecting = true; model.setSelectedItem(item); selecting = false; } private Object lookupItem(String pattern) { Object selectedItem = model.getSelectedItem(); // only search for a different item if the currently selected does not match if (selectedItem != null && startsWithIgnoreCase(selectedItem.toString(), pattern)) { return selectedItem; } else { // iterate over all items for (int i=0, n=model.getSize(); i < n; i++) { Object currentItem = model.getElementAt(i); // current item starts with the pattern? if (startsWithIgnoreCase(currentItem.toString(), pattern)) { return currentItem; } } } // no item starts with the pattern => return null return null; } // checks if str1 starts with str2 - ignores case private boolean startsWithIgnoreCase(String str1, String str2) { return str1.toUpperCase().startsWith(str2.toUpperCase()); } private static void createAndShowGUI() { // the combo box (add/modify items if you like to) JComboBox comboBox = new JComboBox(new Object[] {"Ester", "Jordi", "Jordina", "Jorge", "Sergi"}); // has to be editable comboBox.setEditable(true); // change the editor's document new S11InitialSelection(comboBox); // create and show a window containing the combo box JFrame frame = new JFrame(); frame.setDefaultCloseOperation(3); frame.getContentPane().add(comboBox); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }
import javax.swing.*;
import javax.swing.text.*;
import java.util.Vector;
import java.util.ArrayList;
import java.util.List;public class Combo
extends PlainDocument {
JComboBox comboBox;
static JComboBox recombo;
ComboBoxModel model;
JTextComponent editor;
// flag to indicate if setSelectedItem has been called
// subsequent calls to remove/insertString should be ignored
boolean selecting = false;
public Combo(final JComboBox comboBox) {
this.comboBox = comboBox;
model = comboBox.getModel();
editor = (JTextComponent) comboBox.getEditor().getEditorComponent();
editor.setDocument(this);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (!selecting) highlightCompletedText(0);
}
});
editor.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (comboBox.isDisplayable()) comboBox.setPopupVisible(true);
}
});
// Handle initially selected object
Object selected = comboBox.getSelectedItem();
if (selected != null) setText(selected.toString());
highlightCompletedText(0);
} public void remove(int offs, int len) throws BadLocationException {
// return immediately when selecting an item
if (selecting)return;
super.remove(offs, len);
} public void insertString(int offs, String str, AttributeSet a) throws
BadLocationException {
// return immediately when selecting an item
if (selecting)return;
// insert the string into the document
super.insertString(offs, str, a);
// lookup and select a matching item
Object item = lookupItem(getText(0, getLength()));
if (item != null) {
setSelectedItem(item);
}
else {
// keep old item selected if there is no match
item = comboBox.getSelectedItem();
// imitate no insert (later on offs will be incremented by str.length(): selection won't move forward)
offs = offs - str.length();
// provide feedback to the user that his input has been received but can not be accepted
comboBox.getToolkit().beep(); // when available use: UIManager.getLookAndFeel().provideErrorFeedback(comboBox);
}
setText(item.toString());
// select the completed part
highlightCompletedText(offs + str.length());
} private void setText(String text) {
try {
// remove all text and insert the completed string
super.remove(0, getLength());
super.insertString(0, text, null);
}
catch (BadLocationException e) {
throw new RuntimeException(e.toString());
}
} private void highlightCompletedText(int start) {
editor.setCaretPosition(getLength());
editor.moveCaretPosition(start);
} private void setSelectedItem(Object item) {
selecting = true;
model.setSelectedItem(item);
selecting = false;
} private Object lookupItem(String pattern) {
Object selectedItem = model.getSelectedItem();
// only search for a different item if the currently selected does not match
if (selectedItem != null &&
startsWithIgnoreCase(selectedItem.toString(), pattern)) {
return selectedItem;
}
else {
// iterate over all items
for (int i = 0, n = model.getSize(); i < n; i++) {
Object currentItem = model.getElementAt(i);
// current item starts with the pattern?
if (startsWithIgnoreCase(currentItem.toString(), pattern)) {
return currentItem;
}
}
}
// no item starts with the pattern => return null
return null;
} // checks if str1 starts with str2 - ignores case
private boolean startsWithIgnoreCase(String str1, String str2) {
return str1.toUpperCase().startsWith(str2.toUpperCase());
} private static JComboBox createAndShowGUI(JComboBox combo) {
// the combo box (add/modify items if you like to)
// JComboBox comboBox1 = new JComboBox(new Object[] {"Ester", "大连", "大庆", "大大",
// "ab", "abc", "abcd", "asdfsdf", "dgdfg",
// "uhkg", "e56trstfg", "xcvxvb", "Jordi",
// "Jordina", "Jorge", "Sergi"});
// has to be editable
List list = new ArrayList();
for (int i = 0; i < combo.getItemCount(); i++) { list.add(combo.getItemAt(i));
} for (int i = 0; i < list.size(); i++) {
for (int j = 0; j < list.size() - i - 1; j++)
if ( ( ( (String) list.get(j)).compareToIgnoreCase( (String) list.get(j +
1))) > 0) {
String a = (String) list.get(j);
String b = (String) list.get(j + 1);
String c;
c = a;
a = b;
b = c;
list.set(j, a);
list.set(j + 1, b);
}
}
Object[] array = list.toArray();
JComboBox comboBox = new JComboBox(array); comboBox.setEditable(true);
// change the editor's document
new Combo(comboBox);
return comboBox;
// create and show a window containing the combo box
// JFrame frame = new JFrame();
// frame.setDefaultCloseOperation(3);
// frame.getContentPane().add(comboBox);
// frame.pack(); frame.setVisible(true);
}
//ComboBox调用
public static JComboBox creatCombo(final JComboBox combo) {// javax.swing.SwingUtilities.invokeLater(new Runnable() {
// public void run() {
recombo = new JComboBox();
recombo = createAndShowGUI(combo);
// }
// }); return recombo;
}
}
例如:
JComboBox abcCombo=new JComboBox();
abcCombo=creatCombo(abcCombo);这样abcCombo就ok了
LZ看看改改什么地方应该就可以吧
好用了在看
import javax.swing.*;
import javax.swing.text.*;public class S11InitialSelection extends PlainDocument {
JComboBox comboBox;
ComboBoxModel model;
JTextComponent editor;
// flag to indicate if setSelectedItem has been called
// subsequent calls to remove/insertString should be ignored
boolean selecting=false;
public S11InitialSelection(final JComboBox comboBox) {
this.comboBox = comboBox;
model = comboBox.getModel();
editor = (JTextComponent) comboBox.getEditor().getEditorComponent();
editor.setDocument(this);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (!selecting) highlightCompletedText(0);
}
});
editor.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (comboBox.isDisplayable()) comboBox.setPopupVisible(true);
}
});
// Handle initially selected object
Object selected = comboBox.getSelectedItem();
if (selected!=null) setText(selected.toString());
highlightCompletedText(0);
}
public void remove(int offs, int len) throws BadLocationException {
// return immediately when selecting an item
if (selecting) return;
super.remove(offs, len);
}
public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
// return immediately when selecting an item
if (selecting) return;
// insert the string into the document
super.insertString(offs, str, a);
// lookup and select a matching item
Object item = lookupItem(getText(0, getLength()));
if (item != null) {
setSelectedItem(item);
} else {
// keep old item selected if there is no match
item = comboBox.getSelectedItem();
// imitate no insert (later on offs will be incremented by str.length(): selection won't move forward)
offs = offs-str.length();
// provide feedback to the user that his input has been received but can not be accepted
comboBox.getToolkit().beep(); // when available use: UIManager.getLookAndFeel().provideErrorFeedback(comboBox);
}
setText(item.toString());
// select the completed part
highlightCompletedText(offs+str.length());
}
private void setText(String text) {
try {
// remove all text and insert the completed string
super.remove(0, getLength());
super.insertString(0, text, null);
} catch (BadLocationException e) {
throw new RuntimeException(e.toString());
}
}
private void highlightCompletedText(int start) {
editor.setCaretPosition(getLength());
editor.moveCaretPosition(start);
}
private void setSelectedItem(Object item) {
selecting = true;
model.setSelectedItem(item);
selecting = false;
}
private Object lookupItem(String pattern) {
Object selectedItem = model.getSelectedItem();
// only search for a different item if the currently selected does not match
if (selectedItem != null && startsWithIgnoreCase(selectedItem.toString(), pattern)) {
return selectedItem;
} else {
// iterate over all items
for (int i=0, n=model.getSize(); i < n; i++) {
Object currentItem = model.getElementAt(i);
// current item starts with the pattern?
if (startsWithIgnoreCase(currentItem.toString(), pattern)) {
return currentItem;
}
}
}
// no item starts with the pattern => return null
return null;
}
// checks if str1 starts with str2 - ignores case
private boolean startsWithIgnoreCase(String str1, String str2) {
return str1.toUpperCase().startsWith(str2.toUpperCase());
}
private static void createAndShowGUI() {
// the combo box (add/modify items if you like to)
JComboBox comboBox = new JComboBox(new Object[] {"Ester", "Jordi", "Jordina", "Jorge", "Sergi"});
// has to be editable
comboBox.setEditable(true);
// change the editor's document
new S11InitialSelection(comboBox);
// create and show a window containing the combo box
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(3);
frame.getContentPane().add(comboBox);
frame.pack(); frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
这个可以直接跑
HOHO