Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setUndecorated(true);
        frame.setBackground(new Color(0, 0, 0, 0));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(new ShadowPane());

        JPanel panel = new JPanel(new GridBagLayout());
        panel.add(new JLabel("Look ma, no hands"));

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

class ShadowPane extends JPanel {

    public ShadowPane() {
        setLayout(new BorderLayout());
        setOpaque(false);
        setBackground(Color.BLACK);
        setBorder(new EmptyBorder(0, 0, 10, 10));
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(200, 200);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setComposite(AlphaComposite.SrcOver.derive(0.5f));
        g2d.fillRect(10, 10, getWidth(), getHeight());
        g2d.dispose();
    }
}