如何根据jTable中的jComboBox选择更新相邻字段？
[英]How to update adjacent field according to jComboBox selection in jTable?
问题描述
我有一个场景，其中jTable中具有多种颜色的jComboBox更改了jTable同一行中具有所选颜色名称的另一个字段。
当选择jComboBox时，相邻字段会相应地更改，但是当我单击另一个jComboBox而不是更改相邻字段时，它将更改先前选择的行。
这是我到目前为止的代码：
import javax.swing.DefaultCellEditor;
import javax.swing.table.*;
public class TestJTable extends javax.swing.JFrame {
public TestJTable() {
initComponents();
String[] columnNames = {"Choose Colour", "Colour Chosen"};
Object[][] data =
{
{"Red", new String("Red Colour")},
{"Blue", new String("Blue Colour")},
{"Green", new String("Green Colour")},
{"Yellow", new String("Yellow Colour")}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
jTable.setModel(model);
jTable.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(jCBColour));
}
/**
* 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() {
jCBColour = new javax.swing.JComboBox();
jScrollPane1 = new javax.swing.JScrollPane();
jTable = new javax.swing.JTable();
jCBColour.setEditable(true);
jCBColour.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Red", "Blue", "Green", "Yellow" }));
jCBColour.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jCBColourActionPerformed(evt);
}
});
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null},
{null, null},
{null, null},
{null, null}
},
new String [] {
"Choose Colour", "Colour Chosen"
}
));
jScrollPane1.setViewportView(jTable);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(89, 89, 89)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 452, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(113, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(14, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(178, 178, 178))
);
pack();
}// </editor-fold>
private void jCBColourActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(evt.getActionCommand());
System.out.println(jCBColour.getSelectedIndex());
if (jCBColour.getSelectedIndex() != -1) {
switch (jCBColour.getSelectedIndex()){
case 0: jTable.setValueAt("Red Colour", jTable.getSelectedRow(), 1);
break;
case 1: jTable.setValueAt("Blue Colour", jTable.getSelectedRow(), 1);
break;
case 2: jTable.setValueAt("Green Colour", jTable.getSelectedRow(), 1);
break;
case 3: jTable.setValueAt("Yellow Colour", jTable.getSelectedRow(), 1);
break;
default:
break;
}
}
}
/**
* @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(TestJTable.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TestJTable.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TestJTable.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TestJTable.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 TestJTable().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JComboBox jCBColour;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable;
// End of variables declaration
}
任何帮助将不胜感激 ：）
3 个解决方案
解决方案1
1 2015-10-10 16:00:50
我不能重复你的问题。 在Windows 7上使用JDK8_u45对我来说效果很好。
话虽如此，您不应该尝试通过组合框上的ActionListener更新模型。
相反，您应该使用自定义TableModel，只要更改第一列，该TableModel就会更新第二列。 就像是：
DefaultTableModel model = new DefaultTableModel(data, columnNames)
{
@Override
public void setValueAt(Object value, int row, int column)
{
super.setValueAt(value, row, column);
if (column == 0)
{
String color = value.toString();
switch (column)
{
case "Red": setValueAt("Red Color", row, 1); break;
case "Blue": setValueAt("Blue Color", row, 1); break;
...
}
}
}
};
无论通过JTable还是直接通过TableModel更新TableModel，这都将确保数据正确。
解决方案2
0 2015-10-10 18:16:36
感谢您指出正确的方向。 在使用TableModelListener而不是执行操作之后，它终于可以工作了。 这是代码的工作副本：
import java.util.ArrayList;
import javax.swing.DefaultCellEditor;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;
public class TestJTable extends javax.swing.JFrame {
private TableModelListener tableModelListener;
public TestJTable() {
initComponents();
String[] columnNames = {"Choose Colour", "Colour Chosen"};
Object[][] data =
{
{"Red", new String("Red Colour")},
{"Blue", new String("Blue Colour")},
{"Green", new String("Green Colour")},
{"Yellow", new String("Yellow Colour")}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
jTable.setModel(model);
jTable.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(jCBColour));
setTableModelListener();
}
private void setTableModelListener() {
tableModelListener = new TableModelListener() {
@Override
public void tableChanged(TableModelEvent e) {
if (e.getType() == TableModelEvent.UPDATE) {
int row = e.getFirstRow();
int column = e.getColumn();
if (column == 0) {
TableModel model = jTable.getModel();
//ArrayList<String> itemRow = itemCodes.get(jTable.getSelectedIndex());
//String itemDescription = itemRow.get(1);
String colourChosen = "";
switch (jCBColour.getSelectedIndex()) {
case 0: colourChosen = "Red Colour";break;
case 1: colourChosen = "Blue Colour";break;
case 2: colourChosen = "Green Colour";break;
case 3: colourChosen = "Yellow Colour";break;
}
model.setValueAt(colourChosen,row,1);
}
}
}
};
jTable.getModel().addTableModelListener(tableModelListener);
}
/**
* 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() {
jCBColour = new javax.swing.JComboBox();
jScrollPane1 = new javax.swing.JScrollPane();
jTable = new javax.swing.JTable();
jCBColour.setEditable(true);
jCBColour.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Red", "Blue", "Green", "Yellow" }));
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null},
{null, null},
{null, null},
{null, null}
},
new String [] {
"Choose Colour", "Colour Chosen"
}
));
jScrollPane1.setViewportView(jTable);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(89, 89, 89)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 452, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(113, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(14, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(178, 178, 178))
);
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(TestJTable.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TestJTable.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TestJTable.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TestJTable.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 TestJTable().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JComboBox jCBColour;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable;
// End of variables declaration
}
解决方案3
0 2015-10-10 20:46:00
将jCBColourActionPerformed方法更改为following也应有助于解决问题。
private void jCBColourActionPerformed(java.awt.event.ActionEvent evt) {
try {
if (jCBColour.getSelectedIndex() != -1) {
jTable.setValueAt(jCBColour.getItemAt(jCBColour.getSelectedIndex()), jTable.getSelectedRow(), 1);
jTable.repaint();
}
} catch (Exception e) {
e.printStackTrace();
}
}
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