is it possible, in Eclipse, to mark certain lines with Shortcuts and be able to quickly jump to those lines?
Example: Let's say I have maintenanceHeavyMethod() at line 120 in my class, gameLoop() at line 800 and some listener at line 1460.
I'd like to f.ex. press CTRL+SHIFT+1, 2, 3 etc. to mark those positions, and then use f.ex. CTRL+1, 2, 3 to immediately jump to them. I don't like split-screens etc, but I need to jump around when writing.
Is there such a feature?
I'm using latest Eclipse to write Java-programs.
You can add Bookmarks in your code. Select the code fragment you want to bookmark and then go to Edit > Add Bookmark... (also possible via the menu available with a right-click in the left hand column of the editor, like breakpoints).
Then, add the Bookmarks view. Select Window > Show View > Other... > Bookmarks and you'll get something like this:
Sadly, I don't think you can bind a shortcut to a particular bookmark.
Just in case, the shortcut to jump to a particular line is CTRL+L.
That would be best taken care by mylyn:
Define a task with this three method, and you will be to see only those 3 in the package explorer view
To jump to a particular method, I use ctrl+o and then start typing the method. If you're a proficient typist, this shouldn't take any longer; keep in mind that you only have to start typing the name of the method.
Unfortunately this isn't a proper solution for jumping to a line of code within a method.
You can jump to methods by using the outline view. Outline view shows all the Methods, Fields, and Inner-Classes (and their methods and fields and inner-classes...etc) of the source file you currently have open. I personally prefer this method, unless I have a stacktrace and know which line I want to jump to, in which case I use ctrl+L.
Related
I'm want to document the asymptotic runtime of a function, as it will be used for algorithm-engineering for graph problems.
What's the most idiomatic way to do this? Is there a way to create new tags in Javadoc like #return or #author?
I provided an example below, which is the method to delete a vertex in the graph.
/**
* Runtime: O( degreeOf(v) ) because every neighbour of [v] also needs to be updated.
*/
fun deleteVertex(v: V): SimpleGraph<V> {
if (v in m.keys) {
for (nb in m[v]!!)
m[nb]!!.remove(v)
m.remove(v)
}
return this
}
To create custom tags for Javadocs, simply follow these instructions.
You can create other customizations for Javadoc. For example, in Eclipse, you can create "templates" so that when you create new classes or add new methods, the IDE automatically apply this template to add a (Javadoc) comment formatted in the prescribed style of the template you applied. You can save these templates in an XML file so that you could share it with other members of your team. I am sure that IntelliJ and other modern IDEs will have similar features. I am just more familiarized with Eclipse. Here is a video I created many years ago on how to create a Code Formatter in Eclipse. If you advance to the 1:48 mark, you will see "Code Template" right above the "Code Formatter" option I selected in the video. Creating a code template is much easier than a formatter.
To do this, simply click on Windows > Preferences menu to get the Preferences popup. There, select Java > Code Style > Code Templates. in the right pane, expand Comments and select the component you wish to create a comment template for, for example Methods. Click Edit button and format the Javadoc comment to your liking. Obviously, you will have to do a bit of research to get really creative with your comments. For example, you might need to figure out how to use system variables or create your own. For example, in the image below, I made use the year variable to apply the current year whenever I create a new class.
Once you finish with all your template customizations, simply click the Export button and use the File Chooser dialog to save the file wherever you would like.
One last tip, if you need to embed code snippets in your Javadocs, you can follow the recommendations in this article. I do this very often. Sometimes I find it useful to embed a few lines of code to illustrate different use cases for the method. That way, other developers can see how to use the method in the correct context.
I really like to be able to type sout and get System.out.println. In fact, I like it so much that I want to add more of these. For example, fb could be final boolean.
How do I add that?
Like said in the comments, these macros are called "Live Templates".
To create one:
open the settings menu
select the "Live Templates" entry in the left menu
select the category where you like to create your new template
press the "+" button on the right hand side of the settings menu window
add the abbreviation, "fb" in your case
add a description
... and then the text:
final boolean
($END$ can be omitted here)
Now select the context (link is beneath the text field) where this template will be used and recognized by IDEA
I've used the contexts Java Statement, Expression, Declaration and Other (but "Other" isn't shown in the list of contexts).
It could like this:
To use it write fb on the appropriate place and either wait until IDEA suggests to use the template or press ctrl + space to activate the auto complete, it should create:
final boolean
You may find some more information about creating and editing live templates on the official help page: Creating and Editing Live Templates
I would like to see visually how much space each box takes with as little effort/changes to the code as possible.
I would like to know if it's possible to just put a line around the outer margins of the View or ViewGroup object.
Since it's just for debugging and styling I would like to also quickly turn it off, so I do rather make the changes to my code in one place so it's easy and quick to undo. Is this a default option I am missing? Somehow I expect this feature to exist already.
Here someone asks a different but slightly related question with not a nice answer for my case.
Here someone gives an answer on how to outline one View.
Border for an Image view in Android?
Code-wise you could follow the answer to the first link you posted and create a drawable with the name "developer_borders" or something similar and apply it to every view you wish to have its borders visible.
To easily remove it afterwards, you can right-click the directory of your project and click Replace in Path.... For Text to find you want to search for android:background="#drawable/developer_borders and for Replace with don't use anything. This will find every occurrence of what you are searching and replace it with an empty string.
There might be an easier option. Some devices have quite powerful Developer Options. "Show layout bounds" is what you want but take a look at the rest while you are at it, some are pretty awesome.
Is it possible to evaluate a expression in Eclipse similar to IntelliJ. Where you can dynamically type code and the result will be displayed during debug?. I know it does something similar "Display" but you need to highlight code that has been written (so you cant write any new code unless you re-compile).
Perhaps there are plugins that i could use?. I have just started using eclipse
There is a Display view as well that can do exactly what you want. Go to Window > Show view > Display (or Other... if the Display view is not there. In the Display view, you can type any code you want during debug (content assist is available). The current objects and variables are also available to use. After you wrote your code, you have to highlight it, right click and select Execute or hit CTRL-U. You may play around with the other possible actions as well.
Besides that, you can also write in the source code during debug and evaluate it using Display as you mentioned, if you have the source for the class you are debugging.
1 - Type your expression inside a method that you are debugging
2 - Select that code
3 - Press CTRL + SHIFT + I
4 - Eclipse will evaluate your expression and show the results in a floating window
You can change variable values on the fly using the Debug perspective.
The top right corner of Eclipse should have the variables view from which you can select a variable name and change its value. You can also set conditional breakpoints by selecting the breakpoints view in the top right corner of Eclipse. Right-click on the breakpoint and select breakpoint properties. Check the conditional checkbox and write an expression that only when it evaluates as true does the program suspend during Debugging.
Change Variable Values during Debug
Conditional Breakpoints
Although Display View works; There are two ways else to evaluate an expression.
In the context of the debugging session, we can write and run custom code to evaluate possibilities. This is done in the Debug Shell. For example, if we need to cross-check the correctness of the sqrt functionality, we could do it in the Debug Shell. On the code, Right-click -> Inspect to see the value.
You can select an expression then open Context Menu -> Inspect or press CTRL + Shift + I, during debugging, the result will be displayed.
Select any expression in your code. Then right-click and select "Display" (or press the associated key-combination).
For completely new expressions, use the Display view. It's like a scrapbook for expressions. If the Display view is not visible, select Window > Show view > Display to add it. Then type any expression in the view, and do the same thing as for expressions in your code: select the expression, right-click and select "Display".
For expressions that you want to always see the value of, every time execution is halted, use the Expressions view instead.
When I first learned Java, I was using an IDE called "BlueJ." It had this feature called "Scope Highlighting" which made it very easy to read blocks of code. Now I've moved on from BlueJ and began using Eclipse. I'm currently in the process of customizing Eclipse to my liking and would like this Scope Highlighting feature inside Eclipse.
I've searched everywhere for an answer on how to do it but I cannot find any information pointing to a solution for doing it in Eclipse.
Here's a picture to demonstrate what Scope Highlighting looks like:
I think the best option for you is EditBox, a scope highlighting plugin for Eclipse:
http://editbox.sourceforge.net/
I'm afriad that closest you can get is Shift + Alt + arrow_up
It is selecting wider block of code. pressing this few times will give you very similar result to what you are searching for. I use it often.. it is useful, also for refactoring.
EDIT: As #j2emanue said: you can just double click the delimiter (like a bracket) and it will highlight the entire scope.
you can use Shift + Alt + arrow_up but many people dont realize you can just double click the delimiter (like a bracket) and it will highlight the entire scope. Try double clicking your if statements bracket for example and watch eclipse highlight the entire scope. It works with any delimiter. so you can use parenthesis as well.
as a side note: if your using intelliji checkout this plugin works great: https://github.com/izhangzhihao/intellij-rainbow-brackets#screenshots
This isn't exactly what you're after but you can put your cursor in a method and then click the Show Source Of Selected Element only button on the toolbar. Your editor gets reduced to just that method. Click again and your back to your entire file.
I doubt eclipse does have the same function as blue j.The best advise I can give you, is to change your theme to your liking which would enable you to easily select and highlight the block of code...and to customise your theme , go to http://eclipsecolorthemes.org/. ....
If you still have a problem, go to http://codejava.co.uk/contact.html and send your email.you can create a dummy one if want, then I will send you XML files I use for my eclipse themes.
can Bracketeer do this ? its an eclipse plug in ..
http://marketplace.eclipse.org/content/bracketeer-java-jdt#.UK6sY4fAdLc
Maybe you will also like the VSCode extension "Blockman". It highlights nested code blocks based on curly/square/round brackets, html/xml tags and Python/Yaml indentation. (I am the author of Blockman).
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https://i.ibb.co/31F0rm9/vscode-blockman-intro-leodevbro-extension3.png
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