Java Swing Tutorial - Java Swing JColorChooser

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A JColorChooser is a Swing component that lets we choose a color graphically in a JDialog.

The following code selects a color using a JColorChooser and prints a message on the standard output:

import java.awt.Color;
/*from ww w .  j  a  v a2s.co m*/
import javax.swing.JColorChooser;

public class Main {
  public static void main(String[] args) {
    // Display a color chooser dialog
    Color color = JColorChooser.showDialog(null, "Select  a  color", null);

    // Check if user selected a color
    if (color == null) {
      System.out.println("we cancelled or  closed the   color chooser");
    } else {
      System.out.println("we selected  color:  " + color);
    }

  }
}

Example

The following code shows how to display color chooser dialog and use the selected color to set the button background.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/*from w  ww . jav  a 2s .co  m*/
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JFrame;

public class Main {
  public static void main(String args[]) {
    JFrame f = new JFrame("JColorChooser Sample");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    final JButton button = new JButton("Pick to Change Background");

    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        Color initialBackground = button.getBackground();
        Color background = JColorChooser.showDialog(null, "JColorChooser Sample", initialBackground);
        if (background != null) {
          button.setBackground(background);
        }
      }
    };
    button.addActionListener(actionListener);
    f.add(button, BorderLayout.CENTER);
    f.setSize(300, 200);
    f.setVisible(true);
  }
}   

Example 2

The following code shows how to listen to color selection changes event.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
/*from w  ww . ja va2  s  . co  m*/
import javax.swing.JColorChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.colorchooser.ColorSelectionModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Main {

  public static void main(String args[]) {
    JFrame frame = new JFrame("JColorChooser Popup");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    final JLabel label = new JLabel("www.java2s.com", JLabel.CENTER);
    label.setFont(new Font("Serif", Font.BOLD | Font.ITALIC, 48));

    frame.add(label, BorderLayout.SOUTH);

    final JColorChooser colorChooser = new JColorChooser(label.getBackground());

    ColorSelectionModel model = colorChooser.getSelectionModel();
    ChangeListener changeListener = new ChangeListener() {
      public void stateChanged(ChangeEvent changeEvent) {
        Color newForegroundColor = colorChooser.getColor();
        label.setForeground(newForegroundColor);
      }
    };
    model.addChangeListener(changeListener);

    frame.add(colorChooser, BorderLayout.CENTER);

    frame.pack();
    frame.setVisible(true);
  }
}

Custom Color Chooser Panel

The following code shows how to add a Custom Color Chooser Panel to a JColorChooser Dialog.

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
/*w  w  w .j  a  v  a  2  s .  co  m*/
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.colorchooser.AbstractColorChooserPanel;

public class Main {
  public static void main(String[] argv) {
    JColorChooser chooser = new JColorChooser();
    chooser.addChooserPanel(new MyChooserPanel());
  }
}

class MyChooserPanel extends AbstractColorChooserPanel {
  public void buildChooser() {
    setLayout(new GridLayout(0, 3));
    makeAddButton("Red", Color.red);
    makeAddButton("Green", Color.green);
    makeAddButton("Blue", Color.blue);
  }

  public void updateChooser() {
  }

  public String getDisplayName() {
    return "MyChooserPanel";
  }

  public Icon getSmallDisplayIcon() {
    return null;
  }
  public Icon getLargeDisplayIcon() {
    return null;
  }
  private void makeAddButton(String name, Color color) {
    JButton button = new JButton(name);
    button.setBackground(color);
    button.setAction(setColorAction);
    add(button);
  }

  Action setColorAction = new AbstractAction() {
    public void actionPerformed(ActionEvent evt) {
      JButton button = (JButton) evt.getSource();

      getColorSelectionModel().setSelectedColor(button.getBackground());
    }
  };
}

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