Я использую macOS 10.14.2 и JDK 1.8.0_192.
Для моего приложения у меня есть заставка с использованием java.awt.SplashScreen Java.
Когда я запускаю свое приложениев Windows заставка будет скрываться под перекрывающимся окном, если щелкнуть по указанному окну.
Однако в macOS заставка скрывается на долю секунды, прежде чем снова оказаться на вершине.
Это можно увидеть с помощью примера кода Java SplashScreen :
Требуемый аргумент виртуальной машины - "-splash: pathToImage", где pathToImage - это путь в вашей системе к следующему изображению: https://i.imgur.com/snPOG2S.gif (требуется загрузка)
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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();
}
}
Если это облегчает задачу, вот ссылка на скомпилированный jar с указанным выше кодом: https://github.com/Jorl17/jar2app/files/1456251/SplashDemo.jar.zip.
У него уже есть изображение внутрии был скомпилирован со следующей строкой в манифесте «SplashScreen-Image: splash.gif», поэтому аргумент VM не требуется.