Java tutorial
import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import javax.swing.JColorChooser; import javax.swing.JComponent; import javax.swing.colorchooser.ColorSelectionModel; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; public class Main { public static void main(String[] argv) { JColorChooser chooser = new JColorChooser(); final MyPreviewPanel pre = new MyPreviewPanel(chooser); chooser.setPreviewPanel(pre); ColorSelectionModel model = chooser.getSelectionModel(); model.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent evt) { ColorSelectionModel model = (ColorSelectionModel) evt.getSource(); pre.curColor = model.getSelectedColor(); } }); } } class MyPreviewPanel extends JComponent { Color curColor; public MyPreviewPanel(JColorChooser chooser) { curColor = chooser.getColor(); setPreferredSize(new Dimension(50, 50)); } public void paint(Graphics g) { g.setColor(curColor); g.fillRect(0, 0, getWidth() - 1, getHeight() - 1); } }