ADDITIONAL SYSTEM INFORMATION :
macOS (10.14 Mojave)
Oracle JDK 8u191 (build 1.8.0_191-b12 / HotSpot build 25.191-b12)
Oracle JDK 11.0.1 (build 11.0.1+13-LTS / HotSpot build 11.0.1+13-LTS)
A DESCRIPTION OF THE PROBLEM :
MacOS default system shortcut 'Move focus to next window' (Cmd+`) cannot switch focus between three Java Frames. Pressing Cmd+` only switches focus between two last open Java Frames.
It seems that the issue appeared on jdk8u131 and it is reproducible on jdk8u131 - jdk8u191, jdk11.0.1.
The issue is NOT reproducible on jdk8u121 and on current releases jdk8u202, jdk11.0.2.
Possible regression of JDK-8169589.
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Open three java.awt.Frames
2. Press Cmd+` three times
Or please run MoveFocusShortcutTest using Java:
<JAVA_HOME>/bin/javac MoveFocusShortcutTest.java
<JAVA_HOME>/bin/java MoveFocusShortcutTest
Or please run MoveFocusShortcutTest using JTReg:
<JTREG_HOME>/bin/jtreg -testjdk:<JAVA_HOME> MoveFocusShortcutTest.java
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Focus successively switches between all three Java Frames.
Please see the MoveFocusShortcutTest output on jdk8u121:
<jdk1.8.0_121.jdk>/Contents/Home/bin/java -showversion MoveFocusShortcutTest
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
Open test frames
Window gained focus: TestFrame1
Window gained focus: TestFrame2
Window gained focus: TestFrame3
All frames were opened
Move focus to the next window
Window gained focus: TestFrame2
Move focus to the next window
Window gained focus: TestFrame1
Move focus to the next window
Window gained focus: TestFrame3
Test PASSED
Please see the MoveFocusShortcutTest output on jdk11.0.2:
<jdk-11.0.2.jdk>/Contents/Home/bin/java -showversion MoveFocusShortcutTest
java version "11.0.2" 2018-10-16 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.2+7-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.2+7-LTS, mixed mode)
Open test frames
Window gained focus: TestFrame1
Window gained focus: TestFrame2
Window gained focus: TestFrame3
All frames were opened
Move focus to the next window
Window gained focus: TestFrame2
Move focus to the next window
Window gained focus: TestFrame1
Move focus to the next window
Window gained focus: TestFrame3
Test PASSED
ACTUAL -
Focus only switches between two last open Frames.
Please see the MoveFocusShortcutTest output on jdk8u191:
<jdk1.8.0_191.jdk>/Contents/Home/bin/java -showversion MoveFocusShortcutTest
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
Open test frames
Window gained focus: TestFrame1
Window gained focus: TestFrame2
Window gained focus: TestFrame3
All frames were opened
Move focus to the next window
Window gained focus: TestFrame2
Move focus to the next window
Window gained focus: TestFrame3
Move focus to the next window
Window gained focus: TestFrame2
Exception in thread "main" java.lang.RuntimeException: Test FAILED: Command+` shortcut cannot move focus to the TestFrame(s): 1
at MoveFocusShortcutTest.main(MoveFocusShortcutTest.java:138)
Please see the MoveFocusShortcutTest output on jdk11.0.1:
<jdk-11.0.1.jdk>/Contents/Home/bin/java -showversion MoveFocusShortcutTest
java version "11.0.1" 2018-10-16 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.1+13-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.1+13-LTS, mixed mode)
Open test frames
Window gained focus: TestFrame1
Window gained focus: TestFrame2
Window gained focus: TestFrame3
All frames were opened
Move focus to the next window
Window gained focus: TestFrame2
Move focus to the next window
Window gained focus: TestFrame3
Move focus to the next window
Window gained focus: TestFrame2
Exception in thread "main" java.lang.RuntimeException: Test FAILED: Command+` shortcut cannot move focus to the TestFrame(s): 1
at MoveFocusShortcutTest.main(MoveFocusShortcutTest.java:138)
---------- BEGIN SOURCE ----------
import java.awt.AWTException;
import java.awt.Frame;
import java.awt.GraphicsEnvironment;
import java.awt.Robot;
import java.awt.Window;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
/**
* @test
* @summary Cmd+` doesn't work
* @requires (jdk.version.major >= 8 & os.family == "mac")
* @run main MoveFocusShortcutTest
*/
/*
* Description: Test checks that Command+` macOS system shortcut successively switches focus between three Java Frames.
*
* Note: Please check that Command+` macOS system shortcut is enabled before launching this test
* (use system Preferences -> Keyboard -> Shortcuts tab -> Keyboard -> mark 'Move focus to next window' checkbox)
* MacOS accessibility permission should also be granted on macOS > for the application launching this test, so
* Java Robot is able to access the keyboard (use System Preferences -> Security&Privacy -> Accessibility -> Privacy).
*/
public class MoveFocusShortcutTest {
private static final int PAUSE = 2000;
private static TestFrame frame1;
private static TestFrame frame2;
private static TestFrame frame3;
private static WindowAdapter frameFocusListener;
private static Robot robot;
private static class TestFrame extends Frame {
private final CountDownLatch frameGainedFocus;
private TestFrame(String title) {
super(title);
frameGainedFocus = new CountDownLatch(2);
}
private CountDownLatch getLatch() {
return frameGainedFocus;
}
}
/*
* Checks that pressing Command+` successively switches focus between three Java Frames
*/
public static void main(String[] args) throws AWTException, InterruptedException {
if (GraphicsEnvironment.isHeadless()) {
throw new RuntimeException("ERROR: Cannot execute the test in headless environment");
}
frame1 = new TestFrame("TestFrame1");
frame2 = new TestFrame("TestFrame2");
frame3 = new TestFrame("TestFrame3");
frameFocusListener = new WindowAdapter() {
@Override
public void windowGainedFocus(WindowEvent windowEvent) {
Window window = windowEvent.getWindow();
try {
TestFrame frame = (TestFrame) windowEvent.getWindow();
frame.getLatch().countDown();
System.out.println("Window gained focus: " + frame.getTitle());
} catch (ClassCastException e) {
throw new RuntimeException("Unexpected window: " + window);
}
}
};
try {
robot = new Robot();
robot.setAutoDelay(50);
System.out.println("Open test frames");
showGUI();
Thread.sleep(PAUSE);
robot.waitForIdle();
boolean check1 = (frame1.getLatch().getCount() == 1);
boolean check2 = (frame2.getLatch().getCount() == 1);
boolean check3 = (frame3.getLatch().getCount() == 1);
if (check1 && check2 && check3) {
System.out.println("All frames were opened");
} else {
throw new RuntimeException("Test ERROR: Cannot focus the TestFrame(s): "
+ getFailedChecksString(check1, check2, check3));
}
moveFocusToNextWindow();
Thread.sleep(PAUSE);
robot.waitForIdle();
moveFocusToNextWindow();
Thread.sleep(PAUSE);
robot.waitForIdle();
moveFocusToNextWindow();
Thread.sleep(PAUSE);
robot.waitForIdle();
boolean result1 = frame1.getLatch().await(PAUSE, TimeUnit.MILLISECONDS);
boolean result2 = frame2.getLatch().await(PAUSE, TimeUnit.MILLISECONDS);
boolean result3 = frame3.getLatch().await(PAUSE, TimeUnit.MILLISECONDS);
if(result1 && result2 && result3) {
System.out.println("Test PASSED");
} else {
throw new RuntimeException("Test FAILED: Command+` shortcut cannot move focus to the TestFrame(s): "
+ getFailedChecksString(result1 , result2 , result3));
}
} finally {
destroyGUI();
/* Waiting for EDT auto-shutdown */
Thread.sleep(PAUSE);
}
}
/*
* Opens test frames
*/
private static void showGUI() {
frame1.setSize(400, 200);
frame2.setSize(400, 200);
frame3.setSize(400, 200);
frame1.setLocation(50, 50);
frame2.setLocation(100, 100);
frame3.setLocation(150, 150);
frame1.addWindowFocusListener(frameFocusListener);
frame2.addWindowFocusListener(frameFocusListener);
frame3.addWindowFocusListener(frameFocusListener);
frame1.setVisible(true);
frame2.setVisible(true);
frame3.setVisible(true);
}
/*
* Presses Command+` on macOS keyboard
*/
private static void moveFocusToNextWindow() {
System.out.println("Move focus to the next window");
robot.keyPress(KeyEvent.VK_META);
robot.keyPress(KeyEvent.VK_BACK_QUOTE);
robot.keyRelease(KeyEvent.VK_BACK_QUOTE);
robot.keyRelease(KeyEvent.VK_META);
}
/*
* Returns string containing positions of the false values
*/
private static String getFailedChecksString(boolean ... values) {
int i = 0;
String result = "";
for (boolean value : values) {
i++;
if(!value) {
result += result.isEmpty() ? i : (", " + i);
}
}
return result;
}
/*
* Disposes test frames
*/
private static void destroyGUI() {
frame1.removeWindowFocusListener(frameFocusListener);
frame2.removeWindowFocusListener(frameFocusListener);
frame3.removeWindowFocusListener(frameFocusListener);
frame1.dispose();
frame2.dispose();
frame3.dispose();
}
}
---------- END SOURCE ----------
FREQUENCY : always