How do I set the colors of JTabbedPane tabs?

By I Wayan Saryada in Swing 0 Comment

The example below demonstrates how to change the color of the tabs in JTabbedPane component. The JTabbedPane‘s methods that you can use the change foreground and background color are:

  • setForeground(Color color) for changing the foreground color of all tabs.
  • setBackground(Color color) for changing the background color of all tabs.
  • setForegroundAt(int index, Color color) for changing foreground color for a tab at defined index.
  • setBackgroundAt(int index, Color color) for changing the background color of a tab at a defined index.
package org.kodejava.swing;

import javax.swing.*;
import java.awt.*;

public class TabbedPaneTabColor extends JPanel {
    public TabbedPaneTabColor() {
        initializeUI();
    }

    public static void showFrame() {
        JPanel panel = new TabbedPaneTabColor();
        panel.setOpaque(true);

        JFrame frame = new JFrame("JTabbedPane Demo");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(TabbedPaneTabColor::showFrame);
    }

    private void initializeUI() {
        this.setLayout(new BorderLayout());
        this.setPreferredSize(new Dimension(500, 200));

        JTabbedPane pane = new JTabbedPane();
        pane.addTab("A Tab", new JPanel());
        pane.addTab("B Tab", new JPanel());
        pane.addTab("C Tab", new JPanel());
        pane.addTab("D Tab", new JPanel());

        // Set all tabs foreground color to black.
        pane.setForeground(Color.BLACK);

        // Set different background color for all tabs in
        // JTabbedPane. The color from the first to the last
        // tab will be red, green yellow and orange.
        pane.setBackgroundAt(0, Color.RED);
        pane.setBackgroundAt(1, Color.GREEN);
        pane.setBackgroundAt(2, Color.YELLOW);
        pane.setBackgroundAt(3, Color.ORANGE);

        this.add(pane, BorderLayout.CENTER);
    }
}

The image below shows the result of the code snippet above:

JTabbedPane Tabs Color Demo

How do I add disabled icon for JTabbedPane tabs?

By I Wayan Saryada in Swing 0 Comment

When adding a tabs to JTabbedPane you can define the icon for the tabs. This icon will be displayed beside the tab’s title in enable or disable state of the tabs. To make the user interface better you can also define a disabled icon for the tab. This icon will be displayed when the state of the tabs are disabled.

To assign a disabled icon for the tab use the JTabbedPane‘s setDisabledIconAt(int index, Icon icon) method. As always the index parameter is zero-based which means the first tab is at index number 0. The icon parameter is the disabled icon of your tabs.

package org.kodejava.swing;

import javax.swing.*;
import java.awt.*;
import java.util.Objects;

public class TabbedPaneDisableIcon extends JPanel {
    private final ImageIcon[] disableIcons = {
            new ImageIcon(Objects.requireNonNull(
                    this.getClass().getResource("/images/test-pass-icon-disable.png"))),
            new ImageIcon(Objects.requireNonNull(
                    this.getClass().getResource("/images/test-fail-icon-disable.png"))),
            new ImageIcon(Objects.requireNonNull(
                    this.getClass().getResource("/images/test-error-icon-disable.png"))),
    };

    public TabbedPaneDisableIcon() {
        initializeUI();
    }

    public static void showFrame() {
        JPanel panel = new TabbedPaneDisableIcon();
        panel.setOpaque(true);

        JFrame frame = new JFrame("JTabbedPane Demo");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(TabbedPaneDisableIcon::showFrame);
    }

    private void initializeUI() {
        this.setLayout(new BorderLayout());
        this.setPreferredSize(new Dimension(500, 200));

        JTabbedPane pane = new JTabbedPane();

        ImageIcon tab1Icon = new ImageIcon(Objects.requireNonNull(
                this.getClass().getResource("/images/test-pass-icon.png")));
        ImageIcon tab2Icon = new ImageIcon(Objects.requireNonNull(
                this.getClass().getResource("/images/test-fail-icon.png")));
        ImageIcon tab3Icon = new ImageIcon(Objects.requireNonNull(
                this.getClass().getResource("/images/test-error-icon.png")));
        JPanel content1 = new JPanel();
        JPanel content2 = new JPanel();
        JPanel content3 = new JPanel();

        pane.addTab("Pass", tab1Icon, content1);
        pane.addTab("Fail", tab2Icon, content2);
        pane.addTab("Error", tab3Icon, content3);

        for (int i = 0; i < pane.getTabCount(); i++) {
            pane.setDisabledIconAt(i, disableIcons[i]);
        }

        // Disable the last tab to see the disabled icon displayed.
        pane.setEnabledAt(pane.getTabCount() - 1, false);

        this.add(pane, BorderLayout.CENTER);
    }
}

The result of the code snippet above is:

Set Disabled Icon for JTabbedPane Tabs

Set Disabled Icon for JTabbedPane Tabs

How do I add icon to JTabbedPane tabs?

By I Wayan Saryada in Swing 2 Comments

The following code snippet demonstrates how to create a JTabbedPane component with image icons attached on their tabs. There are two steps that we need to do to achieve this. First we need to load the image icon and after that we need to attach these icons to the tabs.

To create or load an image icon simply create an instance of ImageIcon class. Pass the information about the image location to the constructor of the ImageIcon. In the example below I provide the location of the image using the getClass().getResource() method which will load the images from resources directory.

To add a new tab with image icon attached to the tabs of a JTabbedPane component we are using the addTab(String, Icon, Component) method. The second argument in this method is the image icon of the tab.

Let’s see the code snippet below:

package org.kodejava.swing;

import javax.swing.*;
import java.awt.*;
import java.util.Objects;

public class TabbedPaneWithIcon extends JPanel {
    private TabbedPaneWithIcon() {
        initializeUI();
    }

    private static void showFrame() {
        JPanel panel = new TabbedPaneWithIcon();
        panel.setOpaque(true);

        JFrame frame = new JFrame("Tabbed Pane With Icon Demo");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(TabbedPaneWithIcon::showFrame);
    }

    private void initializeUI() {
        this.setLayout(new BorderLayout());
        this.setPreferredSize(new Dimension(500, 200));

        JTabbedPane pane = new JTabbedPane();

        ImageIcon tab1Icon = new ImageIcon(Objects.requireNonNull(
                this.getClass().getResource("/images/test-pass-icon.png")));
        ImageIcon tab2Icon = new ImageIcon(Objects.requireNonNull(
                this.getClass().getResource("/images/test-fail-icon.png")));
        ImageIcon tab3Icon = new ImageIcon(Objects.requireNonNull(
                this.getClass().getResource("/images/test-error-icon.png")));

        JPanel content1 = new JPanel();
        JPanel content2 = new JPanel();
        JPanel content3 = new JPanel();

        pane.addTab("Pass", tab1Icon, content1);
        pane.addTab("Fail", tab2Icon, content2);
        pane.addTab("Error", tab3Icon, content3);

        this.add(pane, BorderLayout.CENTER);
    }
}

The directory structure of the project:

kodejava-swing
├─ pom.xml
└─ src
   └─ main
      ├─ java
      │  └─ org
      │     └─ kodejava
      │        └─ swing
      │           └─ TabbedPaneWithIcon.java
      └─ resources
         └─ images
            ├─ test-error-icon.png
            ├─ test-fail-icon.png
            └─ test-pass-icon.png

And here is the result of the code snippet above.

JTabbedPane Tab with Icon Demo

How do I scroll or wrap JTabbedPane tab layout?

By I Wayan Saryada in Swing 0 Comment

JTabbedPane component tab layout policy of can be either set to JTabbedPane.SCROLL_TAB_LAYOUT or JTabbedPane.WRAP_TAB_LAYOUT. This layout policy will control the display of the tabs when the tabs cannot be displayed in one go. By the default the layout policy is set to JTabbedPane.WRAP_TAB_LAYOUT. Changing tab layout policy to JTabbedPane.SCROLL_TAB_LAYOUT makes the tabs scrollable. A button for scrolling left-right or up-down will be displayed in the tabbed pane.

package org.kodejava.swing;

import javax.swing.*;
import java.awt.*;

public class TabbedPaneTabLayoutPolicy extends JPanel {
    public TabbedPaneTabLayoutPolicy() {
        initializeUI();
    }

    public static void showFrame() {
        JPanel panel = new TabbedPaneTabLayoutPolicy();
        panel.setOpaque(true);

        JFrame frame = new JFrame("TabbedPane Tab Layout Policy Demo");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(TabbedPaneTabLayoutPolicy::showFrame);
    }

    private void initializeUI() {
        this.setLayout(new BorderLayout());
        this.setPreferredSize(new Dimension(400, 200));

        // Creates a JTabbedPane with scroll tab layout policy
        JTabbedPane pane = new JTabbedPane(JTabbedPane.TOP,
                JTabbedPane.SCROLL_TAB_LAYOUT);
        pane.addTab("One", createPanel("One"));
        pane.addTab("Two", createPanel("Two"));
        pane.addTab("Three", createPanel("Three"));
        pane.addTab("Four", createPanel("Four"));
        pane.addTab("Five", createPanel("Five"));
        pane.addTab("Six", createPanel("Six"));
        pane.addTab("Seven", createPanel("Seven"));
        pane.addTab("Eight", createPanel("Eight"));
        pane.addTab("Nine", createPanel("Nine"));
        pane.addTab("Ten", createPanel("Ten"));

        this.add(pane, BorderLayout.CENTER);
    }

    private JPanel createPanel(String title) {
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.add(new JLabel(title), BorderLayout.NORTH);
        return panel;
    }
}

Here is the screenshot of the code snippet created above. You can see that a button at the top right of the tabbed pane is added so that you can scroll to navigate the hidden tabs.

JTabbedPane Tab Layout Policy Demo

How do I change JTabbedPane tab placement position?

By I Wayan Saryada in Swing 0 Comment

By default, the tabs in a JTabbedPane component is placed on the top. But you can place the tabs on every side of the JTabbedPane component, for example it can be on the top, on the right, on the left or on the bottom of the JTabbedPane.

To change the tab placement position you need to set the tab placement when creating an instance of JTabbedPane. The tab placement can be set using the following constant values: JTabbedPane.TOP, JTabbedPane.RIGHT, JTabbedPane.LEFT and JTabbedPane.BOTTOM.

Let’s see the following code snippet to demonstrate it.

package org.kodejava.swing;

import javax.swing.*;
import java.awt.*;

public class TabbedPaneTabPlacement extends JPanel {
    public TabbedPaneTabPlacement() {
        initializeUI();
    }

    public static void showFrame() {
        JPanel panel = new TabbedPaneTabPlacement();
        panel.setOpaque(true);

        JFrame frame = new JFrame("Tabbed Pane Tab Placement Demo");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(TabbedPaneTabPlacement::showFrame);
    }

    private void initializeUI() {
        this.setLayout(new BorderLayout());
        this.setPreferredSize(new Dimension(500, 200));

        // Creates a JTabbedPane with tabs at the bottom.
        JTabbedPane pane = new JTabbedPane(JTabbedPane.BOTTOM);
        pane.addTab("Tab 1", createPanel("Panel 1"));
        pane.addTab("Tab 1", createPanel("Panel 2"));
        pane.addTab("Tab 3", createPanel("Panel 3"));

        this.add(pane, BorderLayout.CENTER);
    }

    private JPanel createPanel(String title) {
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.add(new JLabel(title), BorderLayout.NORTH);
        return panel;
    }
}

And here is the result of the code snippet above.

JTabbedPane Tab Position Demo