8314246: javax/swing/JToolBar/4529206/bug4529206.java fails intermittently on Linux

Backport-of: 808bb1f7bc5025b4ab01e4e9057feebd253b95a7

Author: GoeLin

test/jdk/javax/swing/JToolBar/4529206/bug4529206.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2023, 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
@@ -21,26 +21,24 @@
  * questions.
  */
 
-/*
- * @test
- * @key headful
- * @bug     4529206
- * @summary JToolBar - setFloating does not work correctly
- * @run     main bug4529206
- */
-
 import java.awt.BorderLayout;
 import java.awt.Dimension;
 import java.awt.Robot;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.JTextField;
 import javax.swing.JToolBar;
 import javax.swing.SwingUtilities;
 
+/*
+ * @test
+ * @key headful
+ * @bug 4529206
+ * @summary JToolBar - setFloating does not work correctly
+ * @run main bug4529206
+ */
+
 public class bug4529206 {
     static JFrame frame;
     static JToolBar jToolBar1;
@@ -58,11 +56,7 @@ private static void test() {
         JTextField tf = new JTextField("click here");
         jPanFrame.add(tf);
         jToolBar1.add(jButton1, null);
-        jButton1.addActionListener(new ActionListener() {
-            public void actionPerformed(ActionEvent e) {
-                buttonPressed(e);
-            }
-        });
+        jButton1.addActionListener(e -> buttonPressed());
 
         frame.setUndecorated(true);
         frame.setLocationRelativeTo(null);
@@ -77,32 +71,24 @@ private static void makeToolbarFloat() {
         }
     }
 
-    private static void buttonPressed(ActionEvent e) {
+    private static void buttonPressed() {
         makeToolbarFloat();
     }
 
     public static void main(String[] args) throws Exception {
         try {
-            SwingUtilities.invokeAndWait(new Runnable() {
-                public void run() {
-                    test();
-                }
-            });
+            SwingUtilities.invokeAndWait(() -> test());
             Robot robot = new Robot();
-            robot.waitForIdle();
+            robot.setAutoWaitForIdle(true);
             robot.delay(1000);
 
-            SwingUtilities.invokeAndWait(() -> {
-                makeToolbarFloat();
-            });
+            SwingUtilities.invokeAndWait(() -> makeToolbarFloat());
+            robot.delay(300);
 
-            robot.waitForIdle();
-            SwingUtilities.invokeAndWait(new Runnable() {
-                public void run() {
-                    if (frame.isFocused()) {
-                        throw
-                          new RuntimeException("setFloating does not work correctly");
-                    }
+            SwingUtilities.invokeAndWait(() -> {
+                if (frame.isFocused()) {
+                    throw
+                      new RuntimeException("setFloating does not work correctly");
                 }
             });
         } finally {