int beginIndex, int endIndex
is important when we invoke methods.
How to show this when the cursor is in the brackets?
Got the final answer.
Just Ctrl +P in Windows/Linux
or ⌘ +P in macOS.
JetBrains reference: Parameter Info
To view the method parameters
Place the caret anywhere within the call of the desired method or function.
Choose View | Parameter Info on the main menu or press Ctrl+P.
To configure the behavior of the view parameter information functionality
Open the IDE Settings and click Code Completion below the Editor node.
In the Parameter info section, define the following options:
To have a complete method or function signature shown rather than a list of required types, select the Show full signatures check box.
Make sure to include the required third-party libraries in the project source path. Otherwise, names of the parameters will not be displayed.
To have the list of parameter types for the called method or function shown automatically after a certain delay, select the Auto pop-up (in ms) check box and specify the time period in milliseconds.
If you have non-standard bindings (or want to change what this is bound to), then look here:
Settings > Keymap > Main menu > View > Tool Windows > Parameter Info
And see what the binding is and/or change it to what you want.
Default shortcut to show parameter info in IDEA is ctrl+P.
Here is a sheet from JetBrains with this and other useful keyboard shortcuts: https://resources.jetbrains.com/storage/products/intellij-idea/docs/IntelliJIDEA_ReferenceCard.pdf
This tooltip appears on mouse over events.
Workaround with keyboard:
Try to use quick documentation pop-up CTRL+Q .
Related
Whenever I try to refactor any code by extracting a method whether from the 'Refactor Menu' or use the shortcut - 'ctrl + alt + M', the method directly gets crated with name as 'extracted' and the dialog box doesn't open wherein I could do changes to name and privacy of method. Also, it doesn't replace any duplicate code block with the method newly created. Is there any reason why the dialog box isn't opening?
Thanks
This is a new feature in the most recent version of IntelliJ Idea (2021.3). When you extract a method there is now a small settings icon next to the replaced code to click (or you can use CTRL+SHIFT+O) and see some of the old menu-style method extraction tools.
I am a .net developer and from last year I started learning Java. But something make me sad, and that is the Java autocomplete IntelliSense. After I choose something from IntelliSense, a method name for example, it put the method name with the default parameter as well. I don't want that!!! I want to work like in Visual Studio, just to put there the name and that's it because usually when I do that I already copy paste a line from above and I want to change only the class method name...
How to change how this autocomplete works?
I attached a photo after I choose a method from that object, but that line was copied from above before choosing.
Do one of the following:
Press Ctrl while selecting a code completion proposal
Configure overwrite instead of insert code completion behavior as default:
In Window > Preferences: Java > Editor > Content Assist in the first section choose Completion overwrites
Your question was already asked here. Basically the gist of it:
Eclipse already has its own sort of Intellisense that only gets triggered by a "." by default. You can change the settings under:
Window -> Preferences -> Java/Editor/Content Assist
A problem, if you want the Intellisense to be always active. The "fix" would be to always use "ctrl"+"space" to open the Intellisense GUI. (Or, even better, to add every letter and character to the Intellisense triggers under: Window -> Preferences -> Java/Editor/Content Assist)
Is there way to quickly find constructors of a particular class in IntelliJ IDEA?
You can use ctrl + F12. This will show all members of the current class in a popup window, then you can select the constructor easily.
Command + F12 on Mac
I generally use the "Parameter Info" Keymap to show all options for a constructor.
If you type out the initial skeleton (new ConstructorClass()) and place the cursor in the brackets, the Parameter Info command will show all possible parameters for all overloaded constructors. This also works for overloaded methods.
N.B. My IntelliJ settings have Ctrl+p as the keymap for "Parameter Info". You will have to check your settings for your mapping.
When hovering your mouse over a Class or variable, how come I don't see any information on the type of the class?
Is this not a feature in IntelliJ?
For example, in vs.net, if I mouse over any variable or class it will popup and tell me what namespace that belongs to etc.
And when I am using a method of a class, it also tells me the different overloads for the method (like types for each parameter, and a list of all the overloads).
This must be a feature in IntelliJ, I just don't know how to get it.
Can someone please clear this up?
Also, how can I tidy up the formatting of a page?
It doesn't work on hover yet, please star/vote the issue.
You need to use keyboard shortcuts for quick documentation pop-up or parameter info pop-up (Ctrl+Q and Ctrl+P with default Windows keymap, F1 and Cmd+P with default OS X 10.5+ keymap).
Code | Reformat Code... is the answer to your second question.
Formatting: Code -> Reformat (shortcut: Ctrl-Alt-L)
Hover doesn't produce the kind of information I'd like either. You can get info with Ctrl-Q ("Quick Help") in Windows or F1 in OS X, which will show where it's from and what it is, with most stuff in the popup window linked up in a reasonable way.
That popup view can also be pinned and/or docked; I often have it docked on the bottom.
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.)