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Why is the application not showing upon adding icon to JMenuItem?

I've been running into a problem lately where I try to se a JMenuItems icon which when I define and point to the icon the application it self don't start/show.
I started looking for errors, but there where none; started looking for write occurencies, which typically pretty much does appear when I add the icon and after that as pointed above the application doesn't start/show.
When the icon is set but commented:
Code
mntmMaximize = new JMenuItem();
mntmMaximize.setText("Maximize Window");
mntmMaximize.setActionCommand("maximize");
mntmMaximize.addActionListener(this);
mntmMaximize.setMnemonic(KeyEvent.VK_PLUS);
mntmMaximize.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, ActionEvent.CTRL_MASK));
// mntmMaximize.setIcon(new ImageIcon(Vision.class.getResource("xray/fullscreen16x.png")));
mnWindow.add(mntmMaximize);<br>
Picture:
Screen Shot Of Visible Application
After the icon is set and trying to execute application:
Code:
mntmMaximize = new JMenuItem();
mntmMaximize.setText("Maximize Window");
mntmMaximize.setActionCommand("maximize");
mntmMaximize.addActionListener(this);
mntmMaximize.setMnemonic(KeyEvent.VK_PLUS);
mntmMaximize.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, ActionEvent.CTRL_MASK));
mntmMaximize.setIcon(new ImageIcon(Vision.class.getResource("xray/fullscreen16x.png")));
mnWindow.add(mntmMaximize);<br>
Picture:
The window not created and application terminated
Note that when the window is not created in this picture the application is therefor terminated.
Please try to answer nice, and if you need the whole source file it is possible.
Edit:
Also if needed i can make a video where i show when i start the application when the icon is set but not commented.

getResource uses the relative path with respect to the package (folder), like in
Vision.class.getResource("fullscreen16x.png")
or absolute like in:
Vision.class.getResource("/xray/fullscreen16x.png")

Jdialog box Title bar icon change

I need to change the Jdialog box title bar icon. By default it uses a java coffee image.
I have searched in internet and used many codes
1. Image im = Toolkit.getDefaultToolkit().getImage("/org/qmon/generate/Images/JDialog -2.ico");
dialog.setIconImage(im);
2. Toolkit kit = Toolkit.getDefaultToolkit ();
Image img = kit.getImage ("/org/qmon/generate/Images/Create File Tag-16x16.png");
dialog.setIconImage(img);
nothing works properly.. Kindly help me.. Thanks in Advance

Firtsly, ico is not a support image format for Java.
The likely reason you're having issues with the second approach is that getImage is expecting a file reference and the image you seem to referencing looks like it's embedded (stored within your application)
Try using something more like...
Image img = kit.getImage (getClass().getResource("/org/qmon/generate/Images/Create File Tag-16x16.png"));
Instead.
Personally, I prefer ImageIO.read as it throws a IOException when something goes wrong...
Image img = ImageIO.read(getClass().getResource("/org/qmon/generate/Images/Create File Tag-16x16.png"));
But that's me...
You should also consider taking a look at Convert List<BufferedImage> to Image which demonstrates the use of ico file (from a 3rd party API) and setIconImages method

Image image = ImageIO.read(new URL(
"http://www.gravatar.com/avatar/f1d58f7932b6ae8027c4e1d84f440ffe?s=128&d=identicon&r=PG"));
dialog.setIconImage( image );
dialog.setVisible(true);

I am using this in my application and working fine
java.net.URL url = ClassLoader.getSystemResource("res/java.png");
ImageIcon icon = new ImageIcon(url);
JOptionPane.showMessageDialog(null, jep, "UroSync",JOptionPane.INFORMATION_MESSAGE, icon);

To improve what MadProgrammer has said, I met the problem and I solved it instantiating a JDialog but using the static class Toolkit method getDefaultToolkit().getImage(Image img).
JDialog dialog = new JDialog();
dialog.setIconImage(Toolkit.getDefaultToolkit().getImage(MyMainClass.class.getResource("/myIcon.png")));
To do that you need to add before the image into the build path of the Project.

Robotium - Trying to click home button in app

I'm new to robotium and i'm trying to write a quick and dirty script to run through all screens in an app.
The problem i have mainly with the 'home button' in the app. I've tried lots of options but i cant seem to get it to click there except with index, which is not what i want.
When i check out the button with the hierarchyviewer it looks like this:
Link
However when i try for example:
assertTrue(
"Wait for text (id: myapp.R.id.home) failed.",
solo.waitForImageById("myapp.R.id.home", 20000));
solo.clickOnImage((ImageView) solo.findViewById("myapp.R.id.home"));
solo.waitForActivity("MenuActivity");
It fails at the waitForImageByID line. Ive tried multiple options like waitForImageButton etc, but i just cant seem to get it clicked. What am i missing here?
junit.framework.AssertionFailedError: View with id: '0' is not found!
at com.jayway.android.robotium.solo.Solo.getView(Solo.java:1990)
at com.jayway.android.robotium.solo.Solo.getView(Solo.java:1970)
at com.bitbar.recorder.extensions.OtherUtils.a(OtherUtils.java:246)
at com.bitbar.recorder.extensions.OtherUtils.b(OtherUtils.java:241)
at com.bitbar.recorder.extensions.v.a(Waiter.java:71)
at com.bitbar.recorder.extensions.ExtSolo.waitForImageButtonById(ExtSolo.java:4176)
at com.example.android.apis.test.Test.testRecorded(Test.java:137)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1740)

Use the following line to press the home button in the action bar
solo.clickOnActionBarHomeButton();

The issue is that the id that it is referring is not in your application, it is in androids default R file, try android.R.id.home and it should work fine. It is worth noting though that if your application uses action bar sherlock to support the action bar pre 4.0 that this will have a different ID there and you will have to handle this in your test.
You can see this for yourself looking at: http://developer.android.com/reference/android/R.id.html

When you are using ActionBarSherlock there are two different Ids you have to check, android.R.id.home for API-Level>11 and abs__home for lower levels (provided by ActionBarSherlock):
View homeButton = activity.findViewById(android.R.id.home);
if (homeButton == null) {
homeButton = activity.findViewById(R.id.abs__home);
}

What about this code:
ArrayList<LinearLayout> ll = solo.getCurrentViews(LinearLayout.class);
//You can change 1 with the ordinal number of LinearLayout you want to click.
solo.clickOnView(ll.get(1));
or also
ArrayList<ImageView> iv = solo.getCurrentViews(ImageView.class);
//You can change 0 with the ordinal number of Image you want to click.
solo.clickOnView(iv.get(0));
I think if you identify the correct id for view or linear layout or image view it should work.

Dave C's answer was working only partially for me. The button was clicked but before the preceding screen was loaded assertions had started and thus were always false. The solution is to run "home click" on the main thread (Robotium 5.2.1):
getInstrumentation().runOnMainSync(new Runnable() {
#Override
public void run() {
solo.clickOnActionBarHomeButton();
}
});

From your question I can see that it is an image view. You can click on any view using the following piece of code.
View view = solo.getView("View_name_from_hierachy_viewer");
solo.clickOnView(view);
View_name_from_hierachy_viewer in your case will be "home".
Let me know if this does not work.

Vaadin, where to put images?

I have a Liferay project with Vaadin portlet.
I want to add icon to my buttons.
Button search = new Button("Search");
search.setIcon(new ThemeResource("img/silk/add.png"));
But dont know where i gonna put it? Now i put it in docroot directory.
UPDATE
No i try this.
Button search = new Button("Search");
search.setIcon(new ThemeResource("LifeRayVaadin-portlet/icons/add.png"));
But when i redeploy project in console get
09:34:05,773 WARN [404_jsp:109] /html/VAADIN/themes/liferay/LifeRayVaadin-portlet/icons/add.png

So your portlet is looking for the icons in /html/VAADIN/themes/liferay/LifeRayVaadin-portlet/icons/add.png.
You could create a directory icons under VAADIN and call:
search.setIcon(new ThemeResource("../../icons/add.png"));
ThemeResource without any path will look for the file in VAADIN/themes/yourtheme/ path and thus ../../ will get you (in this case) to /VAADIN/. I personally would never hardcode the name of a theme or a portlet in a project, because when it changes you have to go through every reference and change them.

You can put your images in $PORTLET-NAME/docroot/icons directory and call them using the Path
/$PORTLET-NAME$/icons/add.png
in your case it will be
Button search = new Button("Search");
search.setIcon(new ThemeResource("/$PORLTET-NAME$/icons/add.png"));

setVolumeControlStream not working when a popup window is displayed

I have this.setVolumeControlStream(AudioManager.STREAM_MUSIC); at the start of all activities in my application so when the user presses the volume up or down buttons, he controls the media volume.
I have a popup window in my program and when that appears the user can no longer control the volume.
Looking at similar questions it seems that setting up onKeyup/down listeners can interfere with the process - but I have not set any up - the only listeners I have for the popup window are setOnClickListeners for the buttons and a setOnDismissListener for the window.
How can I fix this?

Looks like you have to call setOwnerActivity on the Dialog object.
Documentation from the method:
Sets the Activity that owns this dialog. An example use: This Dialog will use the suggested volume control stream of the Activity.
While not tested, this should do the trick. There is also the possibility to use setVolumeControlStream.

I had been creating the popup window with
my_popup_window = new PopupWindow(layout, x, y, true);
I then change it to this...
my_popup_window = new PopupWindow(layout);
my_popup_window.setWidth(x);
my_popup_window.setHeight(y);
and the volume control started to work again. I don't understand why - but it worked.

I just do this pop.setFocusable(false). and it worked.

though the Mick's answer didn't work for me, this is for posterity.
//Declaration
PopupWindow mWindow;
...
//Constructor
mWindow = new PopupWindow(context);
...
//Prepare to Show
mWindow.setContentView();
mWindow.setBackgroundDrawable();
mWindow.setFocusable(false);
...
setting setFocusable to false helped my activity capture onKeyDown() again.