As far as I know, the Classic distribution does not contain the Marketplace client (and that is the only such official distribution). However, it is available for download.

Select Help/Install new software... from the menu, select the Juno update site (http://download.eclipse.org/releases/juno), and then look for the Marketplace client - it is in the General Purpose Tools category.

There is one More easy way to add Eclipse MarketPlace
1. Go to http://eclipse.org/mpc/archive.php and download mpc zip for your eclipse.
2. Than go to Eclipse -&gt; Help -&gt; Install New Software and Add and select Archive file Location 
  then press ok, it will check dependency and install it.
And Enjoy....

`static` members (`static` fields or `static` methods) in Java are associated with their respective class rather than the objects of this class. The following code attempts to access a static field on a `null` reference.

    public class Main
    {
        private static final int value = 10;

        public Main getNull()
        {
            return null;
        }

        public static void main(String[] args)
        {
            Main main=new Main();
            System.out.println(&quot;value = &quot;+main.getNull().value);
        }
    }

Although `main.getNull()` returns `null`, it works and displays `value = 10`. How does this code work?

Static fields on a null reference in Java

I&#39;d like to know if there are effective and open source tools to develop C# applications on Linux (Ubuntu). In particular, I have to develop Windows Forms applications.

I know about the **[Mono][1] project**, but I&#39;ve never used it. What are the best tools (IDE, compiler, etc.) to set up a .NET developing environment on Ubuntu?

Is software developed on Linux runnable on Windows? Are there different behaviors or incompatibilities?

  [1]: https://en.wikipedia.org/wiki/Mono_%28software%29







Developing C# on Linux

I downloaded the [Eclipse Juno 4.2 classic bundle][1], and saw that `Help &gt; Marketplace...` was not available. AFAIK, this is provided by the [mpc plugin. On their website][2] however, I didn&#39;t see a trace of how to install the mpc client for Juno.

How can I add the Marketplace Client to the classic Juno bundle?


  [1]: http://eclipse.org/downloads/
  [2]: http://eclipse.org/mpc/

Install Marketplace plugin on Eclipse Juno

<p>I downloaded the <a href="http://eclipse.org/downloads/" target="_blank" rel="noopener noreferrer">Eclipse Juno 4.2 classic bundle</a>, and saw that <code>Help > Marketplace...</code> was not available. AFAIK, this is provided by the <a href="http://eclipse.org/mpc/" target="_blank" rel="noopener noreferrer">mpc plugin. On their website</a> however, I didn't see a trace of how to install the mpc client for Juno.</p>
<p>How can I add the Marketplace Client to the classic Juno bundle?</p>


How can I enable the `assert` keyword in Eclipse?

    public class A
    {
        public static void main(String ... args)
        {
            System.out.println(1);
            assert false;
    	    System.out.println(2);
        }
    }

How to enable the Java keyword assert in Eclipse program-wise?

I started using Eclipse Juno a few days ago after using older versions for years.

There&#39;s one thing that&#39;s really bothering me: What do that percentages next to the methods in the auto-complete box mean?

![Screenshot of Percentages in Autocomplete Box][1]


  [1]: http://i.stack.imgur.com/i7RKi.png

Eclipse Autocomplete (percent sign, in Juno)

I can&#39;t compile/debug our Android app, because the localization files are not perfect yet.

My IDE&#39;s validation tool [Lint][1] create errors saying:

&gt; newCardsOrderVals is not translated in ar, bg, ca, cs

Compiling/installing/running with Ant works fine, but I would like to use my IDE to ease debugging.

Is there a way to turn off this particular check, or ideally make it a warning rather than an error?

I understand that before release we will really need to get localisation files right, but for the time being it is not a priority as the screens themselves are being modified very frequently.


  [1]: http://tools.android.com/tips/lint/

Lint: How to ignore &quot;&lt;key&gt; is not translated in &lt;language&gt;&quot; errors?

I am getting the above error: 

&gt; error opening trace file: No such file or directory (2)

when I run my android application on the emulator.  Can someone tell me what could be the possible reason for this?

I am using android-sdk-20 and below lines are added to AndroidManifest.xml

    &lt;uses-sdk android:minSdkVersion=&quot;14&quot; android:targetSdkVersion=&quot;15&quot; /&gt;

I have also added the line:

    &lt;uses-permission android:name=&quot;android.permission.WRITE_EXTERNAL_STORAGE&quot; /&gt;

since I thought that there may be some issue with writing to the sd card.


error opening trace file: No such file or directory (2)

I&#39;m using Eclipse PDT on a rather large PHP project and the IDE is almost unusable. It takes nearly 30 seconds to open a file, and other actions, like selecting a folder in the file explorer, editing some text, etc. are equally slow.

I followed various instructions to speed it up but nothing seems to work. This is my current `eclipse.ini` file. Any idea how I can improve it?

	-startup
	plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
	--launcher.library
	plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v20120522-1813
	-showsplash
	org.eclipse.platform
	--launcher.XXMaxPermSize
	256m
	--launcher.defaultAction
	openFile
	-vmargs
	-server
	-Dosgi.requiredJavaVersion=1.7
	-Xmn128m
	-Xms1024m
	-Xmx1024m
	-Xss2m
	-XX:PermSize=128m
	-XX:MaxPermSize=128m
	-XX:+UseParallelGC
	
System: Eclipse 4.2.0, Windows 7, 4 GB RAM

Very slow Eclipse 4.2, how to make it more responsive?

How do I find out which version of Eclipse is currently installed on my system?

How to see my Eclipse version?

Is there an Eclipse plugin available for JavaScript that allows for syntax checking and autosuggestions for .js files in Eclipse?

JavaScript Editor Plugin for Eclipse

I&#39;m using eclipse checkstyle plugin with Juno Eclipse distribution. Anytime the code is checked for checkstyle error I get the following error: 

    cannot initialize module TreeWalker - Unable to instantiate DoubleCheckedLocking

Does anybody know how to fix this problem? Is it a plugin compatibility issue or something else?

Checkstyle Eclipse plugin doesn&#39;t work

I am an old IntelliJ user, now working on a project that requires Eclipse.
I don&#39;t mind learning the Eclipse default keyboard shortcuts where they exist, but so many operations don&#39;t have shortcuts assigned (grrrr!)

I was wondering if there is any plugin that would automatically assign the IntelliJ defaults to any action that does not already have a mapping?

As an alternative I guess I could also use a plugin that just wipes out all of the Eclipse defaults and replaces them with the IntelliJ versions.

Or do I have to just go and manually replace them all one by one :( ?

Is there an IntelliJ Keymapping plugin for Eclipse?

I have updated my `SDK` and `ADT` to the latest version, I have also update the `Eclipse` to `Kepler` the latest one after `Juno`. 

My `ADT` version is `22.0`. After this update when I create a new project, I&#39;m getting error, stating `R cannot be resolved to a variable`. I have imported `import android.R;`, but it is showing as unused import stating `Don&#39;t include android.R here; use a fully qualified name for each usage instead`. 

Same thing is happening with Mac OS also with the latest update. I have tried renaming `activity_main.xml` to other name, but still my `R.java` is not generated. 

Tried all the things which are possible. Cleaned the project, build the whole workspace. Nothing helping.

I think `ADT` or `Eclipse` compatibility is having problem after the update.


I have updated my whole SDK, here is the screenshot, but same problem is there.

![enter image description here][1]


  [1]: http://i.stack.imgur.com/8s1Uo.png

Eclipse giving error, missing R.java file after recent update

I have just upgraded to Eclipse Juno 4.2. I have a completely clean new workspace, but have imported projects that have previously been used in Eclipse 3.7 and therefore have some Eclipse metadata in them.

When moving to 4.2 I converted a project to use &quot;Project Facets&quot;. The only Facet enabled is &quot;Java&quot;.

However, I regularly get &quot;JPA Java Change Event Handler (Waiting)&quot; appearing in my progress view. I do have JPA annotated classes within the project, but I do not have the JPA facet enabled.

So...why am I getting these tasks being run by Eclipse?

![Screenshot of eclipse progress window][1]

  [1]: http://i.stack.imgur.com/Qh9Fm.png

*Update:* Have submitted bug to Eclipse and it is being looked at by the looks of it: https://bugs.eclipse.org/bugs/show_bug.cgi?id=386171

Why is Eclipse Juno 4.2 running &quot;JPA Java Change Event Handler&quot; processes?

I have been using Indigo for a while, and now trying Juno  
There is a sligth bothering difference:

On Indigo When you had 10 tabs opened

   A | **B** | C | D | J | H | G ....(F | T | S)

and currently on B  
when you selected the file shown in tab T again, then this tab (on **Indigo** and that&#39;s the problem not on Juno) would be repositioned like that:


   A | B | **T** | C | D | J | H  ....( G | F | S)

This is useful since, if opening T after B, it means they should be grouped together

on Juno it does not reposition them, instead you will need to find most recent files far in the tab list

Q: how to set it back? I searched params with &#39;tabs&#39; in the options with no result

edit: still the same in new versions (Kepler)

edit: Thanks to Paul&#39; answer, a good solution is to search for .css files in eclipse folder, and set swt-mru-visible property to true in e4-default-win7.css for example

Eclipse tabs repositionning

I have installed:

 - eclipse juno
 - java-6-openjdk-i386 (selected as default JRE in Eclipse)
 - java-7-openjdk-i386

When I try to add a new server Tomcat7, in Eclipse, I get this message 

**&#39;Cannot create a server using the selected type&#39;**

and I can not continue. No problem adding Tomcat6 server.

I read this [question][1] but it didn&#39;t solve it for me 


  [1]: https://stackoverflow.com/questions/8025841/eclipse-3-7-indigo-tomcat7-cannot-create-a-server-using-the-selected-typ

Content Type	Original Author	Original Content on Stackoverflow
Question	parvus	View Question on Stackoverflow
Solution 1 - Eclipse	Zoltán Ujhelyi	View Answer on Stackoverflow
Solution 2 - Eclipse	Anuj Jindal	View Answer on Stackoverflow

Install Marketplace plugin on Eclipse Juno

Eclipse Problem Overview

Eclipse Solutions

Solution 1 - Eclipse

Solution 2 - Eclipse

Developing C# on Linux

Static fields on a null reference in Java

Attributions