8371365: Update javax/swing/JFileChooser/bug4759934.java to use Util.findComponent()

Reviewed-by: aivanov, dnguyen, azvegint

Author: Harshitha Onkar

test/jdk/javax/swing/JFileChooser/bug4759934.java

@@ -31,10 +31,11 @@
  * @run main bug4759934
  */
 
+import java.awt.Component;
+import java.awt.Container;
 import java.awt.Dialog;
 import java.awt.Point;
 import java.awt.Robot;
-import java.awt.event.KeyEvent;
 import java.awt.event.MouseEvent;
 import javax.swing.JButton;
 import javax.swing.JDialog;
@@ -72,8 +73,10 @@ public static void main(String[] args) throws Exception {
             robot.mouseRelease(MouseEvent.BUTTON1_DOWN_MASK);
             robot.delay(500);
 
-            robot.keyPress(KeyEvent.VK_ESCAPE);
-            robot.keyRelease(KeyEvent.VK_ESCAPE);
+            SwingUtilities.invokeAndWait(() -> {
+                JButton cancelBtn = findCancelButton(jfc);
+                cancelBtn.doClick();
+            });
             robot.delay(500);
 
             SwingUtilities.invokeAndWait(() -> {
@@ -121,4 +124,11 @@ private static void createDialog() {
         dlg.setLocation(fr.getX() + fr.getWidth() + 10, fr.getY());
         dlg.setVisible(true);
     }
+
+    private static JButton findCancelButton(final Container container) {
+        Component result = Util.findComponent(container,
+                                              c -> c instanceof JButton button
+                                                   && "Cancel".equals(button.getText()));
+        return (JButton) result;
+    }
 }