I am using Eclipse IDE 3.6 version .
Inside my code i have a method as
public APIRes execute(APIReq request) throws Exception {
// Some code
}
Could you please tell me , when i did open Call Hierarchy , nothing is shown .
Why is it so ??
The obvious solution is that there may be nothing calling that method - at least within the code that Eclipse knows about. Beyond that, we really can't say...
Maybe the problem is that Open Call Hierarchy was not searching the entire Workspace.
Click on the small down arrow (in the Call Hierarchy view window on the right; it is the "View Menu" arrow -- a triangle pointing down) in Call Hierarchy view, set the Search Scope > Workspace.
Do you mean Call Hierarchy or Class Referencing.
If your create a method and nobody calls it, what do you expect to see in the call hierarchy.
Your method is referencing the class in which the method is placed. This would be shown in the reference view.
first clear the project and refresh it and select the method press right click open call hierarchy you will get the class where method declaration is defined.
Related
I'm new to Java and OOP. I have a strange disorder that makes me extremely curious how things work. So I copied this code that use normalize() and I'm trying to get the source code of it but all I found is
public abstract String normalize(String path);
In:
FileSystem.java file
Of course, know what it does. But I'm curious how and why i cant find the code behind it.
Thank you
Michal
If you are using an IDE (like Eclipse), you can use it to find the concrete implementations of that method.
In Eclipse:
Ctrl + Shift + T and type java.io.FileSystem; click "OK"
Hover over the normalize method name. A menu will appear like below.
Click "Open Implementation"
If there is more than one implementation available, you will see a list. Click on the one you want to open.
If there is only one, then that single implementation will be opened automatically.
Is there any way to set breakpoints on all methods of a given class?
I have a huge (2300 lines) legacy class and I need to set breakpoints on all method calls to understand how this mess works.
You can follow the steps below:
Run -> View breakpoints -> Add -> Java Method Breakpoints
Class pattern -> full reference of your class (e.g., mypackage.MyClass)
Method Name -> * (i.e., asterisk wild card)
I have discovered workaround :
1. I have set "Toggle Brakepoint" hotkey to Alt+Numpad 0.
2. After that you can click on first method
3. Use "Toggle Brakepoint"
4. Alt+Down - goto Next Method. ( Alt+Up - goto Previous Method. )
5. Repeat 3 step.
This is similar to Sergey Senkov's answer, but without hotkeys.
In the structure view, click on the first method. Repeat the following for each method:
Context Menu Key
M to toggle the method breakpoint.
Down
There is a plugin for idea:
Simple Toggle All Method Breakpoint.
It allows you to breakpoint all methods / clear all method's breakpoints in one click from context menu on class in Project view.
As Andrey Lavrukhin suggested, there is Simple Toggle All Method Breakpoint, install it through Settings -> Plugins. Works perfectly.
The only way you'll be able to do what you want is to set method breakpoints on each and every method with the class in question. You need to click on the left hand gutter next to the method - a little red circle with 4 dots will appear and you may get a warning saying method level breakpoints can impact performance. You can then further configure the breakpoint (by rightclicking on it, or select shift+F8) and set it so that it breaks on entry, exit or both
I'm afraid theres no way to do this in a single step/setting.
In Eclipse, when you click on a method name and press the F3 button, it takes you to that method.
How can I do the reverse of this? I have a method that's overloaded (probably about 12 different instances of it), and I would like to quickly find if this particular one is being called from anywhere else.
I know you can click on the method, press Ctrl+ H, and Search for this Method in the Workspace. Is there a simpler keyboard shortcut for this?
Click on the method and press Ctrl+Shift+G to perform a Search for References in Workspace.
Ctrl+Alt+H opens the Call Hierarchy, which sounds like what you're looking for.
Is there any way by which I can find out all classes which implement a particular interface?
For example, if I have a interface as follows:
public interface myIntFac{}
I want to find all classes inside current project that implement this interface. How can I find it out in Eclipse?
At the interface level, you can use (assuming the cursor in on the interface)
CTRL+T to show the Quick Type Hierarchy
F4 to Open Type Hierarchy
At the method level, if you hover a method while holding down the control key, a pop-up box gives you the following choices:
Open Declaration
Open Implementation
(source: eclipse.org)
And from anywhere, you can use:
CTRL+SHIFT+H to open the Open Type Hierarchy pop-up and search for any type/interface.
Place your cursor on the interface, and try Ctrl-T.
Put your cursor in myIntFac and press F4 to show the type hierarchy as a separate window, or Ctrl-T to show it as a pop-up. Personally I like the "separate window" approach as it makes it easier to browse, refocus on a different type etc - but if you only want to show the hierarchy very briefly, the pop-up is good too.
When I am coding Java in Eclipse I like the auto-completion feature. With that I mean the popup with method-names that comes when you start typing in a method name for an object. Or maybe it's called something different, i.e. method-suggestions?
But the popup is hidden if I misspells a method name, and it doesn't come back if I delete the misspelled part of the method name. Is there any way to get back the popup after a misspelling without starting to type in the hole method name again?
Press Ctrl+ (Blank). For a complete list of keyboard shortcuts have a look in the eclipse "Preferences" and there "General/Keys".
You should also check out Preferences->Java->Editor->Content Assist. You'll be able to select how it acts; things like if you use it in the middle of a word should it insert or overwrite, should it show deprecated methods, the delay before it automatically appears, and it can even (try to) guess your method parameters based on the variables in the current scope.
I think you're after the Ctrl-Space keyboard shortcut.
(In Eclipse this is called Content Assist. In Visual Studio it's called IntelliSense.)