FULL PRODUCT VERSION :
java version "1.8.0_25" (build 1.8.0_25-b18)

ADDITIONAL OS VERSION INFORMATION :
Windows 8.1 Pro

A DESCRIPTION OF THE PROBLEM :
If an editable JComboBox is used as a cell editor within a JTable, and the user makes a change then moves off the cell, using either the tab key or by clicking on another cell, the change is lost. This is inconsistent with a normal cell where edits are not lost when the user moves to a new cell using tab or mouse clicking.
Currently, the only way to accept an edit of an editable JComboBox within a JTable is to first press enter. Then press tab (or mouse click) to move to another cell.

This problem was reported in 1999-2001 and was supposedly fixed but it appears to have resurfaced.

Refer to:
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4275046
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4336350



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Note: The sample code shown in bug “4275046” demonstrates the problem.


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
---- ComboEditorTest.java ------
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;

public class ComboEditorTest extends JFrame {
    
        // fill in table values
    public static String[] colNames = {
            "no.", "methode", "id 1", "id2", "sample weight", "unit"
        };
    public static Object[][] data = {
             {
                new Integer(1), "chlorid", "123456789012345678901234",
                "4711 - 0815", new Float(7.2348), "g"
            }, {
                new Integer(2), "chlorid", "123456789012345678901234",
                "4711 - 0815", new Float(7.2348), "g"
            }, {
                new Integer(3), "chlorid", "123456789012345678901234",
                "4711 - 0815", new Float(7.2348), "g"
            }
        };

    public ComboEditorTest() {
        JTable table = new JTable(data, colNames);

        JScrollPane scrollPane = new JScrollPane(table);
        scrollPane.setPreferredSize(new Dimension(450, 100));
        getContentPane().add(scrollPane);

        // use a combo box as cell renderer for the 2nd column
        JComboBox cb = new JComboBox();
        cb.setEditable(true);
        cb.addItem("chlorid");
        cb.addItem("HCl");
        cb.addItem("water");
        cb.addItem("NaCl");
        cb.addItem("crystall water");
        cb.addItem("anything");
        TableColumn col = table.getColumnModel().getColumn(1);
        col.setCellEditor(new DefaultCellEditor(cb));


        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent evt) {
                System.exit(0);
            }
        });
    }

    public static void main(String[] args) {
        ComboEditorTest test = new ComboEditorTest();
        test.pack();
        test.setVisible(true);
    }

}
---- end ComboEditorTest.java ------
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Press enter to accept the changes then press tab to move off the cell