Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.LayoutManager;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.plaf.basic.BasicTabbedPaneUI;

public class Main {
    public static void main(String[] args) throws Exception {
        JTabbedPane pane = new JTabbedPane();
        pane.setUI(new SpacedTabbedPaneUI());
        pane.addTab("One", new JPanel());
        pane.addTab("Two", new JPanel());
        pane.addTab("Threeeeeee", new JPanel());
        pane.addTab("Four", new JPanel());

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(pane);
        frame.setSize(500, 200);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

class SpacedTabbedPaneUI extends BasicTabbedPaneUI {
    @Override
    protected LayoutManager createLayoutManager() {
        return new BasicTabbedPaneUI.TabbedPaneLayout() {
            @Override
            protected void calculateTabRects(int tabPlacement, int tabCount) {
                final int spacer = 20; // should be non-negative
                final int indent = 4;

                super.calculateTabRects(tabPlacement, tabCount);

                for (int i = 0; i < rects.length; i++) {
                    rects[i].x += i * spacer + indent;
                }
            }
        };
    }
}