Question

I’m having a JTabbedPane (with horizontal tabs on the top) in a JPanel, and I want the tabs of this JTabbedPane to fit the whole width of the JPanel, so that if there’s only one tab, the tab would fill the whole width; when there are two tabs, each tab would fill excactly the half, and so on.

Using a custom JComponent as a the title of the tabs and setting the PreferredSize there isn’t a solution since it seems that JTabbedPanel puts some sort of border around the title-components.

Is there any easier solution than extending and/or rewriting part/all of JTabbedPane?

(Maybe I should add that when I’m talking about tabs, I refer to these navigational components you can click on to switch the component shown, and not the components themselves.)

Answer 1

Test this code :

public class Tabs extends javax.swing.JFrame {


    public Tabs() {
        initComponents();
    }


       private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jTabbedPane1 = new javax.swing.JTabbedPane();
        jPanel2 = new javax.swing.JPanel();
        jPanel3 = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setLayout(new java.awt.BorderLayout());

        jPanel2.setLayout(new java.awt.BorderLayout());


        jTabbedPane1.addTab("tab1", jPanel2);


        jPanel3.setLayout(new java.awt.BorderLayout());


        jTabbedPane1.addTab("tab2", jPanel3);

        jPanel1.add(jTabbedPane1, java.awt.BorderLayout.CENTER);

        add(jPanel1);

        pack();
    }


    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Tabs().setVisible(true);
            }
        });
    }


    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JTabbedPane jTabbedPane1;
}