8346055: javax/swing/text/StyledEditorKit/4506788/bug4506788.java fails in ubuntu22.04

Backport-of: 31ceec7cd55b455cddf0953cc23aaa64612bd6e7

Author: GoeLin

test/jdk/javax/swing/text/StyledEditorKit/4506788/bug4506788.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,98 +29,85 @@
  * @run main bug4506788
  */
 
-import java.awt.*;
-import java.awt.event.*;
-import java.lang.reflect.InvocationTargetException;
-import javax.swing.*;
-import javax.swing.event.*;
-import javax.swing.text.*;
+import java.awt.Dimension;
+import java.awt.Point;
+import java.awt.Robot;
+import java.awt.event.KeyEvent;
+import java.awt.event.InputEvent;
+import javax.swing.JEditorPane;
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+import javax.swing.event.CaretEvent;
+import javax.swing.event.CaretListener;
+import javax.swing.text.DefaultStyledDocument;
+import javax.swing.text.MutableAttributeSet;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyledEditorKit;
 
 public class bug4506788 {
 
-    private volatile boolean passed = false;
-    private JEditorPane jep;
+    private static volatile boolean passed;
+    private static volatile Point p;
+    private static volatile Dimension dim;
+    private static JEditorPane jep;
+    private static JFrame f;
 
-    public static void main(final String[] args) {
-        bug4506788 app = new bug4506788();
-        app.init();
-        app.start();
-    }
-
-    public void init() {
-        try {
-            SwingUtilities.invokeAndWait(new Runnable() {
-                @Override
-                public void run() {
-                    createAndShowGUI();
-                }
-            });
-        } catch (InterruptedException | InvocationTargetException ex) {
-            ex.printStackTrace();
-            throw new RuntimeException("FAILED: SwingUtilities.invokeAndWait method failed then creating and showing GUI");
-        }
-    }
-
-    public void start() {
-        Robot robot;
+    public static void main(final String[] args) throws Exception {
         try {
-            robot = new Robot();
+            Robot robot = new Robot();
             robot.setAutoDelay(100);
-        } catch (AWTException e) {
-            throw new RuntimeException("Robot could not be created");
-        }
-
-        robot.waitForIdle();
-
-        Point p;
-        try {
-            p = getJEPLocOnScreen();
-        } catch (Exception e) {
-            throw new RuntimeException("Could not get JEditorPane location on screen");
-        }
-
-        robot.mouseMove(p.x, p.y);
-        robot.mousePress(InputEvent.BUTTON1_MASK);
-        robot.mouseRelease(InputEvent.BUTTON1_MASK);
-        robot.keyPress(KeyEvent.VK_HOME);
-        robot.keyRelease(KeyEvent.VK_HOME);
-        robot.keyPress(KeyEvent.VK_RIGHT);
-        robot.keyRelease(KeyEvent.VK_RIGHT);
-        robot.keyPress(KeyEvent.VK_X);
-        robot.keyRelease(KeyEvent.VK_X);
-        robot.keyPress(KeyEvent.VK_RIGHT);
-        robot.keyRelease(KeyEvent.VK_RIGHT);
-
-        robot.waitForIdle();
 
-        if (!passed) {
-            throw new RuntimeException("Test failed.");
-        }
-    }
+            SwingUtilities.invokeAndWait(() -> createAndShowGUI());
 
-    private Point getJEPLocOnScreen() throws Exception {
+            robot.waitForIdle();
+            robot.delay(1000);
 
-        final Point[] result = new Point[1];
+            SwingUtilities.invokeAndWait(() -> {
+                p = jep.getLocationOnScreen();
+                dim = jep.getSize();
+            });
 
-        SwingUtilities.invokeAndWait(new Runnable() {
-            @Override
-            public void run() {
-                result[0] = jep.getLocationOnScreen();
+            robot.mouseMove(p.x + dim.width / 2, p.y + dim.height / 2);
+            robot.waitForIdle();
+            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+            robot.waitForIdle();
+            robot.keyPress(KeyEvent.VK_HOME);
+            robot.keyRelease(KeyEvent.VK_HOME);
+            robot.waitForIdle();
+            robot.keyPress(KeyEvent.VK_RIGHT);
+            robot.keyRelease(KeyEvent.VK_RIGHT);
+            robot.waitForIdle();
+            robot.keyPress(KeyEvent.VK_X);
+            robot.keyRelease(KeyEvent.VK_X);
+            robot.waitForIdle();
+            robot.keyPress(KeyEvent.VK_RIGHT);
+            robot.keyRelease(KeyEvent.VK_RIGHT);
+            robot.waitForIdle();
+
+            if (!passed) {
+                throw new RuntimeException("Test failed.");
             }
-        });
-
-        return result[0];
+        } finally {
+            SwingUtilities.invokeAndWait(() -> {
+                if (f != null) {
+                    f.dispose();
+                }
+            });
+        }
     }
 
-    private void createAndShowGUI() {
+    private static void createAndShowGUI() {
         jep = new JEditorPane();
         String text = "abc";
-        JFrame f = new JFrame();
+        f = new JFrame("bug4506788");
         jep.setEditorKit(new StyledEditorKit());
         jep.setText(text);
         jep.addCaretListener(new CaretListener() {
             @Override
             public void caretUpdate(CaretEvent e) {
+                System.out.println("getDot " + e.getDot());
                 passed = (e.getDot() == 3);
             }
         });