How can I make a cell in a JTable change its background color when text is changed? I would like the color to change for a few seconds and then restore it to its initial background color. This is my code:
package GUI;
import java.util.ArrayList;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
public class NewJFrame extends javax.swing.JFrame {
private TableModel myTableModel;
/**
* Creates new form NewJFrame
*/
public NewJFrame() {
myTableModel = new MyTableModel();
initComponents();
}
/**
* 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() {
button = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
table = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
button.setText("jButton1");
button.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
buttonActionPerformed(evt);
}
});
table.setModel(myTableModel);
jScrollPane1.setViewportView(table);
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(button)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(15, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 375, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(26, 26, 26)
.addComponent(button)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 275, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void buttonActionPerformed(java.awt.event.ActionEvent evt) {
myTableModel.setValueAt(1.40, 0, 2);myTableModel.setValueAt(1.00, 1, 2);
}
/**
* @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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.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 NewJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton button;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable table;
// End of variables declaration
private static class Rate {
private String Currency1;
public void setCurrency1(String Currency1) {
this.Currency1 = Currency1;
}
public void setCurrency2(String Currency2) {
this.Currency2 = Currency2;
}
public void setExchangeRate(Double ExchangeRate) {
this.ExchangeRate = ExchangeRate;
}
public String getCurrency1() {
return Currency1;
}
public String getCurrency2() {
return Currency2;
}
public Double getExchangeRate() {
return ExchangeRate;
}
private String Currency2;
private Double ExchangeRate;
public Rate() {
}
public Rate(String Currency1, String Currency2, Double ExchangeRate) {
this.Currency1 = Currency1;
this.Currency2 = Currency2;
this.ExchangeRate = ExchangeRate;
}
}
private static class MyTableModel extends AbstractTableModel {
private final String[] columnNames = {"Currency1", "Currency2", "Exchange Rate"};
private ArrayList<Rate> ratesList = new ArrayList<Rate>() {
{
add(new Rate("EUR", "USD", 1.13));
add(new Rate("EUR", "GBP", 0.87));
add(new Rate("EUR", "CHF", 1.09));
add(new Rate("EUR", "JPY", 113.49));
add(new Rate("EUR", "MAD", 10.86));
}
};
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
// TODO Auto-generated method stub
Rate rate = ratesList.get(rowIndex);
switch (columnIndex) {
case 0:
rate.setCurrency1((String) aValue);
fireTableCellUpdated(rowIndex, columnIndex);
break;
case 1:
rate.setCurrency2((String) aValue);
fireTableCellUpdated(rowIndex, columnIndex);
break;
case 2:
rate.setExchangeRate((Double) aValue);
fireTableCellUpdated(rowIndex, columnIndex);
break;
default:
break;
}
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Rate rate = ratesList.get(rowIndex);
switch (columnIndex) {
case 0:
return rate.getCurrency1();
case 1:
return rate.getCurrency2();
case 2:
return rate.getExchangeRate();
default:
return null;
}
}
@Override
public int getRowCount() {
return ratesList.size();
}
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public String getColumnName(int column) {
return columnNames[column];
}
}
}
