right-click on the class, and select references/Project

For searching all of the workspace, &lt;kbd&gt;CTRL&lt;/kbd&gt;+&lt;kbd&gt;SHIFT&lt;/kbd&gt;+&lt;kbd&gt;G&lt;/kbd&gt;

Put the cursor on the class name (works for methods, constructors, fields, etc, too), press &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Shift&lt;/kbd&gt;+&lt;kbd&gt;G&lt;/kbd&gt; and enjoy.

Since Eclipse 4.12 you can also use the code minings feature:

[Eclipse minings settings][1]


  [1]: https://i.stack.imgur.com/G6UeN.png

I&#39;m developing a project that has a number of hardware sensors connecting to the deployment machine through RS232 serial ports.

But ... I&#39;m developing on a machine without an physical RS232 serial ports, but I would like to make fake serial ports that I can connect to and output data from with the aim of faking input from hardware sensors.

Does anyone know of a way to create a fake serial port and control it on Windows XP? 

Faking an RS232 Serial Port

Previously I have enjoyed TortoiseSvn&#39;s ability to generate simple commit stats for a given SVN repository. I wonder what is available in Git and am particularly interested in :

 - Number of commits per user
 - Number of lines changed per user
 - activity over time (for instance aggregated weekly changes)

Any ideas? 

Which Git commit stats are easy to pull

Is there a way in Eclipse to select a Java class, and then bring up a list of all Java files where that class is used within a project?





Eclipse: Java, see where class is used

<p>Is there a way in Eclipse to select a Java class, and then bring up a list of all Java files where that class is used within a project?</p>


I have already read various accounts of Clojure vs. Scala and while I realize that both have their place.  There are a few considerations that I haven&#39;t acquired a complete explanation on when it comes to comparing both Clojure with Scala:

1.) Which of the two languages is generally *faster*?  I realize that this will vary from one language feature to another but an general assessment of performance would be helpful.  For example: I know that Python dictionaries are really fast.  But as a whole, it is a *much* slower language than Java.  I don&#39;t want to go with Clojure and run into this problem down the road.

2.) How is interoperability with Java?  All I have read so far is that Scala has native collections types that make it a bit clumsy to integrate with a large Java code-base, whereas Clojure follows a simple Iterable/Iterator-centric way to inter-operate with Java classes.  Any more thoughts/details on this?

Ultimately, if it is a close enough draw between clojure and scala, I might try them both.  One thing about Clojure is the language seems *very* simple.  But then again, Scala has a very flexible type system.  But, I know that Scala is fast (based on multiple personal accounts).  So, if Clojure is significantly slower: I&#39;d like to know sooner rather than later.

On Performance and Java Interoperability: Clojure vs. Scala

Why is `list.size()&gt;0` slower than `list.isEmpty()` in Java? On other words why `isEmpty()` is preferable over `size()&gt;0`?


When I look at the implementation in `ArrayList`, then it looks like the speed should be the same:

**ArrayList.size()**

        /**
         * Returns the number of elements in this list.
         *
         * @return the number of elements in this list
         */
        public int size() {
    	  return size;
        }

**ArrayList.isEmpty()**
   

        /**
         * Returns &lt;tt&gt;true&lt;/tt&gt; if this list contains no elements.
         *
         * @return &lt;tt&gt;true&lt;/tt&gt; if this list contains no elements
         */
        public boolean isEmpty() {
            return size == 0;
         }
     
If we just write a simple program to get the time take by both the methods, that case `size()` will take more `isEmpty()` in all cases, why this so?

Here is my TestCode;

    import java.util.List;
    import java.util.Vector;
    
    public class Main {
        public static void main(String[] args) {
            List l=new Vector();
            int i=0;
            for(i=0;i&lt;10000;i++){
                l.add(new Integer(i).toString());
            }
            System.out.println(i);
            Long sTime=System.nanoTime();
            l.size();
            Long eTime=System.nanoTime();
            l.isEmpty();
            Long eeTime=System.nanoTime();
            System.out.println(eTime-sTime);
            System.out.println(eeTime-eTime);
        }
    }


Here `eTime-sTime&gt;eeTime-eTime` in all cases. Why?

Why is list.size()&gt;0 slower than list.isEmpty() in Java?

Is there a elegant way of obtaining only one `Entry&lt;K,V&gt;` from HashMap, without iterating, if key is not known.

As order of entry of entry is not important, can we say something like

    hashMapObject.get(zeroth_index);

Although I am aware that there exist no such get by index method.

If I tried approach mentioned below, **it would still have to get all the entry set of the hashmap**.

    for(Map.Entry&lt;String, String&gt; entry : MapObj.entrySet()) {
        return entry;
    }

Suggestions are welcome.

EDIT: Please suggest any other Data Structure to suffice requirement.

how to get the one entry from hashmap without iterating

In my OSGi-based Java app I am developing a bundle to provide the rest of the system with access to the file system.  In addition to providing access to the user home directory, I also wish to provide access to a non-user specific area.  Exactly what this area will be used for is as yet undetermined, but it will not be for preferences (handled by a different bundle), however it may be used to store data that could change at runtime.

I intend on using the following directories for this purpose:

- Windows Vista &amp; Windows 7: “\ProgramData”.
- Windows XP: “\Documents and Settings\All Users“.
- Mac OS X: “/Library/Application Support”.

Where is a sensible equivalent in Linux and how do I get a handle on it from my Java code?

Where to store application data (non-user specific) on Linux

I am just trying to understand why all fields defined in an Interface are implicitly `static` and `final`. The idea of keeping fields `static` makes sense to me as you can&#39;t have objects of an interface but why they are `final` (implicitly)?

Any one knows why Java designers went with making the fields in an interface `static` and `final`?

Why are all fields in an interface implicitly static and final?

Sometimes, I&#39;ll run a program that accidentally contains an infinite loop or something. Eclipse will let me continue editing the program, but be super slow. How can I stop it? (Do I want to restart the JVM?) Restarting eclipse itself always works, but that breaks my workflow.

Eclipse: stop code from running (java)

I am using Eclipse PDT 3.5 on Vista (32 bit). It works, though eclipse needs admin rights to execute. This annoys me, but I accept it.

But: every now and then (I am not sure, it may even be everytime I want to open a project), I get the error message &quot;The project description file (.project) for *my project* is missing.&quot;. 

It is NOT missing, it is in the main folder of the project. It has no special flags set (it is not hidden, nor system file, nor write-protected).

This is for ALL projects I have in my list. The only solution I have found so far is to delete the project from eclipse an re-add it. This is somewhat annoying.

What can I do?

EDIT: The workspaces are on a server volume. Can this be the problem? I used Eclipse 3.3 before, and there it was no problem with the server paths. And the server volume is mapped to a drive letter.

The project description file (.project) for my project is missing

I have added a second Virtual Device to test a different screen resolution (QVGA), but now I wanna switch back to the first AVD (HVGA) again. How can I set the virtual device in Eclipse to be used by default or even specifically for my project? In the properties I can only set the API level.

I also couldn&#39;t find any information in the [command line tool documentation][1] to set this manually.


  [1]: http://developer.android.com/guide/developing/tools/avd.html

Android Emulator: select AVD (Android Virtual Device) to run by default

I often use the Eclipse feature (Galileo) of suggested error corrections to automatically create code stubs or to refactor things. For example, I would write a method that calls other methods which don&#39;t exist yet, then move the mouse over the error message and click on &quot;create method&quot;. Or, change `this` to the class name and choose &quot;add `static` modifier&quot; from the quick fixes.

I think this is very convenient because it lets me stay in one place in my code and sort of &quot;remotely&quot; wire up what&#39;s not currently visible on my screen. What I think is annoying though, is that I have to leave the keyboard, hover my mouse over the error symbol, wait for the tooltip to pop up, and click on the option (doing that, I sometimes move the mouse a little over the edge and the tooltip goes away again - very annoying).

Am I missing a faster method here? I can&#39;t seem to find a keyboard shortcut, but then I have overlooked stuff from the huge preference dialog before.

Faster way (keyboard shortcuts?) to use quick fixes in Eclipse?

- What do the icons in the Eclipse debugger mean?
- What do the icon decorators in Eclipse mean?
- What do the icons in Eclipse&#39;s Package Explorer mean?
- What do the little letters on top of Eclipse icons mean?
- What&#39;s the difference between the two error icons in Eclipse (the x in the red circle and the one with the light bulb)?

I just came to SO looking for this, didn&#39;t find it, and found it on my own elsewhere. But I thought it would be good for SO to have the answer for future reference; I wondered about them all the time when I was new to Eclipse (this was before I discovered SO).

What do the icons in Eclipse mean?

In **Eclipse** you can search for a file in the project by pressing &lt;kbd&gt;CTRL&lt;/kbd&gt;-&lt;kbd&gt;SHIFT&lt;/kbd&gt;-&lt;kbd&gt;R&lt;/kbd&gt;.

Is there a way to do this in **Visual Studio**?



How to search for file names in Visual Studio?

Is there a way to exclude a particular type of .cs file when doing a search in Visual Studio 2005/8?

**Example:** In a refactoring scenario i might search to identify string literals in my code so that i can refactor them into constants or some such. However, *designer.cs files are full of string literals which i don&#39;t care to deal with but they show up in my search and pollute the result set.

i usually search for *.cs...

How do i ignore *.designer.cs?


How to exclude designer.cs from Visual Studio file search

Is there an existing plugin or tweak that speeds up the &quot;Go To File&quot; search in Netbeans ? Compared to Eclipse, Netbeans search is way too slow specially if one has multiple large size projects.

I know I can use &lt;kbd&gt;CTRL&lt;/kbd&gt;+&lt;kbd&gt;O&lt;/kbd&gt; for &quot;Go To Type&quot; but often I need to search for other file types like XMLs, property files etc. across thousands of files in multiple projects. 

I installed the Quick Search plugin but even that doesn&#39;t search for non Java file types.


Faster search for files in Netbeans

I want to mass-edit a ton of files that are returned in a grep. (I know, I should get better at sed).

So if I do:

    grep -rnI &#39;xg_icon-*&#39;

How do I pipe all of those files into vi?



Can you mass edit all files returned in a grep?

Often when I want to search through my code in Visual Studio, I know the thing I&#39;m looking for is in some C# code. However, as I&#39;ve used the same variable name in a JavaScript file, I have to wade through all those search results too. This gets even worse when the text I&#39;m looking for is also used in a third-party JavaScript library that we&#39;ve brought into the project: this can result in hundreds of search results.

To compound things, our designers include HTML mock-ups of the pages in the same project, so I often find I&#39;m hitting loads of search results in there too.

I guess what I really want is to see results in my .cs, .aspx, and .ascx files, but not .js or .htm.

Is there any way to do any of the following:

- Search only in files of a particular type (search only .cs files).
- Search only in files of any of a given set of types (search only .cs, .aspx and .ascx files).
- Search in all file types except a particular type or types (search everything except .js).

I suspect not, in which case is there any crafty way of working around this?

Content Type	Original Author	Original Content on Stackoverflow
Question	Mike	View Question on Stackoverflow
Solution 1 - Java	VonC	View Answer on Stackoverflow
Solution 2 - Java	gustafc	View Answer on Stackoverflow
Solution 3 - Java	Hendrik	View Answer on Stackoverflow

Eclipse: Java, see where class is used

Java Problem Overview

Java Solutions

Solution 1 - Java

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Solution 3 - Java

Which Git commit stats are easy to pull

Faking an RS232 Serial Port

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