I have a problem in Eclipse (with Java 8) that I add a breakpoint for a function in some class in the project. But when the debugging starts, it is from the beginning of the program (from the main method!). Of course, I do not want to follow all the program so please what can I do?
Take a look at the "Debug/Run Configuration..." and uncheck to button to start in debugging in the main method.
how to setup "Main Class" in "Run Configurations" in Eclipse
Uncheck/Check "Stop in main".
Is this what you want to do?
Possibly you have a class or method breakpoint...
You can press F8 key to jump to next point or you can
Delete the breakpoint.
To modify them: open debug perspective and take a look to breakpoints:
if you don't have this, please take a look to other answers. ;)
Select your debug configuration from menu Run->debug configurations...
Go to main tab and uncheck Stop in main checkbox.
Related
I used a hint that said use Run with --debug, so I clicked on it. How can I remove the feature to get an output as usual?
Clicking this link will create a new temporary configuration for Gradle that will have --debug argument added there:
You can either remove this argument from the configuration or delete this configuration completely and continue using your existing run/debug configurations without this option.
More details can be found in IntelliJ IDEA help.
Click the red square on the top right, like here:
Alternatively you can also press it in the tab where you can control the debugger, which is on the down left:
If you don't see that, make sure to click on "Debug" on the bottom bar.
I am new to Java and using Eclipse IDE Photon Release version 4.8.0.
I cannot display variables.
I have tried the followings in accordance with previous online Q&As only to fail:
(1) Select a variable -> right click -> select inspection
* It didn't work because inspection is not on the right click menu.
(2) Window -> Perspective -> Reset perspective
* It didn't work.
(3) Window -> Show view -> Other -> search "variable" and open "Variable View"
* It opened the Variable View window, but nothing is displayed. Changing layout didn't help.
How can I display information about the variables? I would like to see their values step by step when debugging a programme.
U need to enter into debug mode to see the results line by line
There are two aspects:
1) Putting Breakpoint
2) Running in debug mode
Double click on any line it will add a breakpoint on that line, now click on green bug icon(debug)/debug as
it will run the application in debug mode
It will stop at that line and will ask to switch in debug perspective, select yes
[imp] now if u can't see variable view select
window->show view->variable
here u will see all the variables in scope, press F6 and it will proceed line by line debugging there u will be able to find the variable value at each line
Put breakpoints where you want the debugger to stop and inspect variable values.(Double click on left side of the line to put a break-point)
Run your java code in debug mode.
Eclipse will open debug perspective automatically for you when it stops at the break-point.
In this window you can see the variable values and other properties in 'Variables' view. (Mostly present on the top right in Debug perspective)
Enter in debug mode and enable the variable view using the (3) option. When you are stopped at debug, if the view of variables is empty, close it, and now, without stopping the application, perform the reset using step (2). Now try to enable again the view using the step (3).
I had the same problem. The solution was as follows.
eclipse menu -> Project -> Clean -> Clean all projects
After that, I did restart eclipse IDE.
It works for me.
And you should check your administrator privileges.
Run javaw.exe, java.exe as administrator.
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.
I want to follow a Java program so that I can understand how everything works together. I could do it with Visual Studio so I am hoping that Eclipse may also have a feature to step through that I have not been able to find.
Put a breakpoint at a given line (double click before the line, or right-click > toggle breakpoint)
Run the program in debug mode. That is - Debug As > Java program
Whenever the breakpoint is reached, the Debug perspective opens, and you can step through.
Refer step1, step2, step3,step4 images respectively.
Simply put, you can run your code in Debug Mode by pressing only F11 or clicking that little bug on the top of the screen. Use F5 to trace into, F6 to step over, CTRL-SHIFT-B to set/remove breakpoints.
First you must set a break point in your code. The easiest way to do this is to open up the source file where you want to stop your program, find the line of code where you want to set your break point, and right-click the left-hand margin and select 'Toggle Breakpoint.' Once you've done this, launch your program within Eclipse using the Debug mode. To do this, go to Run>Debug Configurations and set up the configuration to run your program. Alternatively, you can open up the source file that is the entry point to your program (it should include your 'public static void main(String args[])' method), and right-click within the editor and go to Debug As>Java Application. Once the program launches and the code in which your break point is reached, Eclipse will open up the debug perspective. This will show where you are within your program and any variables that you have set. You can step through your program using the buttons in the 'Debug View'. You can also use the menu items within the Run menu to step through the program.
All the answers here are not really "cut and dry". To make this debug feature available in the eclipse workspace, first, you need to set the breakpoint properties of Line Breakpoint. Check the box: "Trigger Point" to allow the trigger to initiate at the line that you want it to begin to break during debug mode. Otherwise, you can F11, F5, or F6 all day long, and nothing will allow you to step into your code.
I have an Eclipse project where I often launch the same java class. I have added my run configuration to the favorites menu, but to launch it I still need to click on the run-drop-down menu and click the icon - is there any way to associate a shortcut to this? When I searched for it I got lost in all the plugins & other things which seemed to be not so simple.
edit: Let me clarify, I want something I can type the moment I start eclipse, regardless of what page I'm viewing, so no "run last" or "run current"; I want F12 to link to "launch foo.bar.MainClass".
Just use Ctrl + F11. (This is the standard keyboard shortcut to run the class you are working on)
I wish this is what you are looking for... buddy.
Open the workspace preferences by the menu: Window > Preferences
Select from the tree: Run/Debug > Launching
Now the Launching preferences are seen.
At the bottom there is Launch Operation
Use the option Always launch the previously launched application
You can configure your launch behaviour so Ctrl-F11 will launch the last launched application again, regardless of your current editor selection.
Look at "Run/Debug" - "Launching" within the eclipse preferences.
alt+shift+x+J Rocks
You can go Window -> Preferences -> General -> Key and bind anything you want!I hope it helps!
You should put in a feature request in the eclipse bug tracker (or vote up an existing equivalent feature request) or code it yourself.
It is Ctrl+F11
Ctrl+Shift+X or Ctrl+Shift+J didn't worked for me!
If you've added these classes to your favorite run configurations (available from the run/debug toolbar buttons as "Organize Favorites..."), then the shortcut key combo is Alt+R,T,1 to run your first favorite, Alt+R,T,2 to run your second, etc. Alt+R,H,# works for debug configs.
on Windows machine
ctrl+Fn F11 --- running
ctrl+Fn+Shift F11 --- debugging
If you are someone like me who wants to create a shortcut to run a class/program in java directly, you can create your own preferable shortcut in ECLIPSE!
Follow these steps:
Window > Preferences > General > Keys
Select run from command column
Enter your own shortcut in Binding section
Apply and close!!
WARNING: Make sure you don't create a shortcut which is already assigned for a different task!
I cannot this the answer here but : CTRL+SHIFT+T do apparently exactly what you want! :) Maybe it's because you code it by yourself by time...
Watch here: http://eclipse.dzone.com/news/effective-eclipse-shortcut-key for more.
I faced this problem in eclipse too. I have customized the configuration for me.
Windows -> preferances -> keys
Search for your configuration eg "Run Java Application" or just look for its icon.
Select it
and below in the binding field press keyboard keys which you want to add a shortcut for this configuration eg. ctrl + shift + T
and Apply
You are good to go use the same shortcut keys to whenever you need it.
Just create an "External tool configuration" instead of a standard configuration for the class you want to run, and assign a shortcut key to "Run last launched external Tool".
Of course, there shall be no other external tool configuration.
Even if other java programs have been launched, or the current class contains a main() method, hitting the shortcut key will always run the same configured class.