Each time I try to run a new program, an old program 'client.java' is run by eclipse. How do I change this setting? How do we tell eclipse which program to run? I tried using the arrow beside run button but it dosen't list out my new program.
You can change the default behavior by going to Window > Preferences > Run/Debug > Launching and in the 'Launch Operation' section, select the radio button for Launch the selected resource or active editor and then select Launch the associated project underneath.
Right Click To the class -> Run As-> JAVA Application
Firs of all make sure that your program has a main class.
Then click in the black button next to the run button -> Run As-> JAVA Application.
If this doesn work make sure you have all this properly set up.
Run Configurations
Related
Whenever I hit Debug or Run in Eclipse, I get a dialog asking me what configuration I want to use.
How do I set a default configuration and bind a keyboard shortcut?
Maybe this article from Eclipse One Tips will help you:
How to run the last launched application
The answer lies in a preference hidden on the Run/Debug page:
Go to Window > Preferences > Run/Debug > Launching.
Select the option Always launch the previously launched application. It’s located at the bottom of the dialog.
The preference should look something like this:
Now you’re free to press
F11, Ctrl+F11 or click the Run/Debug
icons on the toolbar with confidence, knowing it’s going to run what
you expect it to run.
One question arises: How do you quickly run a class as a specific
application (eg. a JUnit test) if you can’t press F11 to
run it? You have some options available:
The fastest way is to use keyboard shortcuts. Eclipse allows you to launch classes using a keystroke, including JUnit tests, Java
applications, etc using Alt+Shift+X.
Alternatively, right-click on the class and select Run As. The submenu will show available options for launching the class.
Lastly, you could click the pulldown arrow on the run/debug icons in the toolbar and select Run As. The submenu once again shows
available options for launching the class.
Eclipse plug-ins that add new project types may contribute 'Launch Configurations' to control how Eclipse executes the application. For example, J2EE based projects need to publish content and start the application server. Contrast this with simply starting a JVM for a regular Java application.
When you select a configuration, Eclipse records this for future use. You can access these by selecting the 'Run/Run Configurations' menu item or selecting 'Run Configurations' from the little drop down menu next to the run and debug toolbar buttons. You can also add new launch configurations through the Run/Debug Configurations dialog that opens. In this dialog, you should see one or more configurations that you previously launched. Selecting one reveals all the info Eclipse uses to launch your application. One tab called 'Common' contains options for controlling the your favorites menu. Checking the box next to Run or Debug will add this launch configuration to the top of its corresponding menu.
If you only have a single configuration in your menu then Eclipse will launch it when you click the associated button. If you have more than one then Eclipse launches (sometimes) the most recently used. I say sometimes because, occasionally, one launch configuration causes another to launch, which cause the last used configuration to be the second one when you would expect it to be the first one. Usually this happens to me when I launch an application, which needs to be built and the build launches a tool. When this happens, just select the correct launch configuration from the drop down menu.
You can bind a keystroke combination to the Run and Debug commands through the 'Windows/Preferences' menu item. Then select 'General/Keys' in the tree control on the left.
I'm trying to follow the Android Development Tutorial - this page: http://developer.android.com/training/basics/firstapp/running-app.html
I am stuck - I cannot run the application. The instructions say "Open one of your project's files and click Run from the toolbar." However, there is no "Run" button on the toolbar, and there is no obvious option to choose from the "Run" dropdown on the menubar (see screenshot below).
Further down on that page, the instructions say "In Eclipse, click Android Virtual Device Manager from the toolbar." That button is also not there!
Am I missing something really obvious? I am on the Java perspective, and I have tried "Window -> Reset Perspective", but I am unable to run the application.
Any help would be appreciated.
EDIT: Under Window -> Customize Perspective -> Menu Visibility, I only have this - ticking Run unfortunately doesn't add anything - nor does ticking Launch under "Toolbar Visibility", when I try that I get the error Launch cannot be made visible because it is in the unavailable null command group. Would you like to switch to the Command Group Availability tab?.
You can add it like Window -> CustomizePerspective -> Menu Visibility -> Run -> Ok
or still can run your project by
Right clicking on your project which you want to run from the project explorer and select Run as and then Android application....T daaa...
If still the problem is there check
The "Run As -> Android Application" is no longer an option in my Eclipse Run Configuration
"Run as" android application is missing
Window -> Customize Perspective -> Toolbar Visibility -> tick Launch -> Press ok
Window -- > Open Perspective --> Java
If the entire toolbar is missing then you can use
Window -> Appearance -> Show Toolbar
Don't modified BuildConfig.java file,that file is generate by android sdk.
You can download android Tutorial video help youself improve.
This problem continues to persist and I am hoping that someone who understands Eclipse can help.
Previously, I worked on a project that involved reading files. However, I am complete with that project and now my current project keeps reading the previous file.
I just want to run programs seperate from the personalityy.java file
I have already tried run -> configuration
Screenshot
It reads from personalityy.java
You're pretty unclear about what exactly you're trying to do, but in short, to run a java application, right-click on the source file in the explorer and select "Run As" and "Java Application".
It looks like you are new to Eclipse. Don't worry the problem is pretty simple. The Green run button on the menu bar will run the last run program by default. You probably have the new file open and you are using the run button in the menu to run. What you have to do is.
Open the file you want to run.
Right click inside the new file in text editor
Click Run as
Click Java Application.
In the future you can click the black down arrow beside the run button to select which program you want to run.
how do you compile in Eclipse? And how do you run the program using this given with the choices: Java Applet or Java Application?
If Project -> Build Automatically is enabled, you will compile when saving your work.
To run it, you have an arrow in a green circle in your toolbar (6th tool if you have a default benchmark). It will run the project using the currently showing class as a main class if it has a main method, or the last run main if it doesn't. Alternatively, you can use the keyboard shortcut CTRL+F11.
If you click on the little down arrow next to the green button, you can access to a history of classes you ran and to the Run configuration, which allows you for example to run a program with parameters or, what interrests you here, to choose to run it as an applet or an application.
Turn on the option: Project > Build Automatically
If you have a main method, run as Java Application. To create a main, type main then ctrl+space and select "main method" to have eclipse auto create it for you.
In Eclipse, running a project is as simple as clicking the run button.
In NetBeans, I'm totally confused. How do I run the program? If I print something, where does it go (e.g. the console in Eclipse)?
Thanks!
EDIT: Solved it. For some reason it was running a different application than the one I had selected. Anyone know why?
It's the same in NetBeans, just klick the "Run" button (you need to have a main class defined though)
The output goes into the "Output" window which is displayed at the bottom of the editor by default.
If you don't see the output window, you can display it using the menu "Window -> Output -> Output"
In the menu, see Run > Run to run a project.
On the bottom right, find the output windows, that's where the print will appear.