Bdtjtk

I am using macOS 10.14.2 and JDK 1.8.0_192.

For my application, I have a splash screen using Java's java.awt.SplashScreen.

When I run my application on Windows, the splash screen will hide under an overlapping window if said window is clicked on.

However, on macOS, the splash screen hides for a split second before it forces itself on top again.

This can be seen with Java's SplashScreen example code:

The VM argument required is "-splash:pathToImage" where pathToImage is a path in your system to the following image: https://i.imgur.com/snPOG2S.gif (download required)

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package splash;



import java.awt.AlphaComposite;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics2D;

import java.awt.Menu;

import java.awt.MenuBar;

import java.awt.MenuItem;

import java.awt.RenderingHints;

import java.awt.SplashScreen;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.event.WindowListener;



public class SplashDemo extends Frame implements ActionListener {

    private static final long serialVersionUID = 1L;



    private static void renderSplashFrame(Graphics2D g, int frame) {

        final String comps = {"foo", "bar", "baz"};

        g.setComposite(AlphaComposite.Clear);

        g.fillRect(120, 140, 200, 40);

        g.setPaintMode();

        g.setColor(Color.BLACK);

        g.drawString("Loading " + comps[(frame / 5) % 3] + "...", 120, 150);

    }



    private SplashDemo() {

        super("SplashScreen demo");

        setSize(300, 200);

        setLayout(new BorderLayout());

        Menu m1 = new Menu("File");

        MenuItem mi1 = new MenuItem("Exit");

        m1.add(mi1);

        mi1.addActionListener(this);

        this.addWindowListener(closeWindow);



        MenuBar mb = new MenuBar();

        setMenuBar(mb);

        mb.add(m1);

        final SplashScreen splash = SplashScreen.getSplashScreen();

        if(splash == null) {

            System.out.println("SplashScreen.getSplashScreen() returned null");

            return;

        }

        Graphics2D g = splash.createGraphics();

        if(g == null) {

            System.out.println("g is null");

            return;

        }

        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        for(int i = 0; i < 100; i++) {

            renderSplashFrame(g, i);

            splash.update();

            try {

                Thread.sleep(90);

            }

            catch(InterruptedException ignored) {}

        }

        splash.close();

        setVisible(true);

        toFront();

    }



    @Override

    public void actionPerformed(ActionEvent ae) {

        System.exit(0);

    }



    private static WindowListener closeWindow = new WindowAdapter() {

        @Override

        public void windowClosing(WindowEvent e) {

            e.getWindow().dispose();

        }

    };



    public static void main(String args) {

        new SplashDemo();

    }

}

If it makes it easier, here's a link to a compiled jar with the above code: https://github.com/Jorl17/jar2app/files/1456251/SplashDemo.jar.zip.

It already has the image internally and was compiled with the following line in the manifest "SplashScreen-Image: splash.gif", so the VM argument isn't required.

This has been confirmed to be a bug in Java after this question was created: https://bugs.openjdk.java.net/browse/JDK-8216158