我正在使用NetBeans IDE创建一个简单的测试我正在使用我的一个项目的问题（所以请原谅NetBeans的一些不必要的膨胀，但实际上并不是太糟糕）。
我有一个JTable，它有一个带有可编辑的JComboBox的单元格编辑器（因此用户可以从列表中选择一个项目或在组合框中键入新文本）。
当用户从组合框中跳出标签时，combox框的单元格编辑器会丢失输入的文本。
如何调整此代码，以便在我键入后从组合框中选择它以保留文本？
package testtablecellfocuslostissue;
import java.awt.Color;
import java.awt.Component;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
/**
*
* @author admin
*/
public class Main extends javax.swing.JFrame {
/**
* Creates new form Main
*/
public Main() {
initComponents();
table1.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
DefaultTableModel model = (DefaultTableModel) table1.getModel();
String[] values = new String[] { "Maintained By", "Endpoint" };
JComboBox comboBox = new JComboBox(values);
TableColumn col = table1.getColumnModel().getColumn(0);
col.setCellEditor(new MyComboBoxEditor(comboBox));
col.setCellRenderer(new MyComboBoxRenderer(values));
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
table1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
table1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null}
},
new String [] {
"Key", "Value"
}
));
jScrollPane1.setViewportView(table1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 167, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Main().setVisible(true);
}
});
}
class MyComboBoxRenderer extends JComboBox implements TableCellRenderer {
public MyComboBoxRenderer(String[] items) {
super(items);
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
//setForeground(table.getSelectionForeground());
setForeground(Color.BLACK);
super.setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}
setSelectedItem(value);
return this;
}
}
class MyComboBoxEditor extends DefaultCellEditor {
private JComboBox comboBox;
public MyComboBoxEditor(JComboBox comboBox) {
super(comboBox);
comboBox.setEditable(true);
}
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable table1;
// End of variables declaration
}
答案 0 :(得分：-1)
这似乎已经成功了，但哇这是一个噩梦：这个解决方案：
package testtablecellfocuslostissue;
import java.util.ArrayList;
import javax.swing.AbstractCellEditor;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableColumn;
/**
*
* @author admin
*/
public class Main extends javax.swing.JFrame {
/**
* Creates new form Main
*/
public Main() {
initComponents();
// Initial choices in the list
ArrayList<String> values = new ArrayList();
values.add("Male");
values.add("Female");
table1.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
TableColumn col = table1.getColumnModel().getColumn(0);
col.setCellEditor(new MyComboBoxEditor(new ArrayList(values)));
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
table1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
table1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null}
},
new String [] {
"Key", "Value"
}
));
jScrollPane1.setViewportView(table1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 167, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
setLocationRelativeTo(null);
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Main().setVisible(true);
}
});
}
public class MyComboBoxEditor extends AbstractCellEditor implements TableCellEditor {
private JComboBox comboBox;
private ArrayList<String> comboBoxChoices;
public MyComboBoxEditor(ArrayList<String> choices) {
this.comboBoxChoices = choices;
}
@Override
public JComponent getTableCellEditorComponent(JTable table, Object item, boolean isSelected, int row, int column) {
comboBox = new JComboBox(comboBoxChoices.toArray());
comboBox.setEditable(true);
if (item != null) {
comboBox.setSelectedItem(item);
}
return comboBox;
}
@Override
public Object getCellEditorValue() {
return comboBox.getEditor().getItem();
}
@Override
public boolean stopCellEditing()
{
DefaultComboBoxModel comboModel = (DefaultComboBoxModel) comboBox.getModel();
Object editingValue = getCellEditorValue();
// Needed because your TableModel is empty
if (editingValue == null){
return super.stopCellEditing();
}
// Get the selected index
int selectedIndex = comboModel.getIndexOf(editingValue);
if (! (selectedIndex == -1)){
return super.stopCellEditing();
}
comboBoxChoices.add((String)editingValue);
return super.stopCellEditing();
}
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable table1;
// End of variables declaration
}