The call stack is viewable when you click on the &#39;Debug&#39; button on the bottom toolbar:
![enter image description here][1]


Specifically, the call stack is as highlighted below :
![enter image description here][5]

You may also be interested in an alternative threads view, enabled by clicking the &#39;Restore threads view&#39; button:
![enter image description here][6]

Here is a bit of official documentation around debugging that you may find useful if you are new to IntelliJ:
   
   1. [Debug Tool Window][2]
   2. [Debug Tool Window - Frames][3] 
   3. [Debug Tool Window - Threads][4]

  [1]: http://i.stack.imgur.com/DE4NC.png
  [2]: http://www.jetbrains.com/idea/webhelp/debug-tool-window.html#debugtoolbar
  [3]: http://www.jetbrains.com/idea/webhelp/debug-tool-window-frames.html
  [4]: http://www.jetbrains.com/idea/webhelp/debug-tool-window-threads.html
  [5]: http://i.stack.imgur.com/QE0R6.png
  [6]: http://i.stack.imgur.com/TQ4RI.png

I had only the view on &#39;Variables&#39;, finally what helped was clicking &#39;Restore Layout&#39; on the left side of Debugger window (this button: [![button][1]][1]). Somehow I must have remove &#39;Frames&#39; before - no other way to restore it...


  [1]: https://i.stack.imgur.com/CQRlr.png

I&#39;ve had it where the Frames and Threads debug tabs are collapsed and only the Variables tab is visible. In this case click and drag the left window edge of the Variables tab to the right.[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/WZ7CS.png

It&#39;s on the lower left in the debug window.

Debugger window has three main tabs, &#39;Frame &amp; Treads&#39;, &#39;Variables&#39;, and &#39;Watches&#39;.  In my case, &#39;Variables&#39; tab occupied the whole debugger window, and it showed Variables tab only.  There is a window splitter at the edge of  the &#39;Variables&#39; tab. To show &#39;Frame &amp; Treads&#39;, move mouse on to the left edge of &#39;Variables&#39; tab. Mouse cursor changes to a splitter. Slide right to resize tab size for &#39;Frame &amp; Treads&#39;.                 

If you only see the current stack frame when stepping into library code, you can click on the &quot;funnel&quot; icon (bottom right on the screenshot below) to display the full, unfiltered call stack.

[![intellij debug window][1]][1]


  [1]: https://i.stack.imgur.com/VxAaW.png

In PowerShell I have an array of string objects, and I have an object that contains string objects. In Java you can do a `.equals(aObject)` to test if the string values match, whereas doing a `==` test if the two objects refer to the same location in memory.

How do I run an equivalent `.equals(aObject)` in powershell?

I&#39;m doing this:

    $arrayOfStrings[0].Title -matches $myObject.item(0).Title

These both have the exact same string values, but I get a return value of false. Any suggestions?


How to compare the contents of two string objects in PowerShell

I am trying to write a program to send UDP packets, as in  https://wiki.python.org/moin/UdpCommunication The code appears to be in Python 2:

    import socket

    UDP_IP = &quot;127.0.0.1&quot;
    UDP_PORT = 5005
    MESSAGE = &quot;Hello, World!&quot;

    print &quot;UDP target IP:&quot;, UDP_IP
    print &quot;UDP target port:&quot;, UDP_PORT
    print &quot;message:&quot;, MESSAGE

    sock = socket.socket(socket.AF_INET, # Internet
                 socket.SOCK_DGRAM) # UDP
    sock.sendto(MESSAGE, (UDP_IP, UDP_PORT))

If I put parenthesis around the printed stuff, it just prints it on the screen.

What do I need to do to make this work?

Python send UDP packet

I&#39;m new to the IntelliJ IDE (usually work with Visual Studio) and I&#39;d like to view the current call stack at a particular breakpoint. I&#39;ve found information on building a call hierarchy but that&#39;s not what I&#39;m looking for. Any information on how to view the current call stack would be appreciated.

IntelliJ IDEA 12 -- viewing the call stack

<p>I'm new to the IntelliJ IDE (usually work with Visual Studio) and I'd like to view the current call stack at a particular breakpoint. I've found information on building a call hierarchy but that's not what I'm looking for. Any information on how to view the current call stack would be appreciated.</p>


I have 2 classes in a one-to-many relationship and a HQL query that is a bit strange. Even if I have read some questions already posted, it does not seem clear to me.

    Class Department{
       @OneToMany(fetch=FetchType.EAGER, mappedBy=&quot;department&quot;)
       Set&lt;Employee&gt; employees;
    }
    Class Employee{
       @ManyToOne
       @JoinColumn(name=&quot;id_department&quot;)
       Department department;
    }

When I use the following query I get duplicates Department objects: 

`session.createQuery(&quot;select dep from Department as dep left join dep.employees&quot;);`

Thus, I have to use distinct:

`session.createQuery(&quot;select distinct dep from Department as dep left join dep.employees&quot;);`

Is this behaviour an expected one? I consider this unusual, as comparing it with SQL.

One-To-Many relationship gets duplicate objects without using &quot;distinct&quot;. Why?

I want to get the value of `HashMap` based on key.&lt;br&gt;

    HashMap&lt;String, ArrayList&lt;String&gt;&gt; map 
        = new HashMap&lt;String, ArrayList&lt;String&gt;&gt;();
    ArrayList&lt;String&gt; arrayList = new ArrayList&lt;String&gt;();
        
    map.put(&quot;key&quot;, arrayList);
    request.setAttribute(&quot;key&quot;, map);

What i did is&lt;br&gt;

    &lt;c:forEach var=&quot;map&quot; items=&quot;${requestScope.key}&quot;&gt;
    	&lt;c:forEach var=&quot;hash&quot; items=&quot;${map.value}&quot;&gt;
    		&lt;option&gt;&lt;c:out value=&quot;${hash}&quot;/&gt;&lt;/option&gt;
    	&lt;/c:forEach&gt;
    &lt;/c:forEach&gt;

But it seems it&#39;s printing everything, what i want to do is to get the value depends on key like: `hash.key` or something

&lt;b&gt;UPDATE:&lt;/b&gt;&lt;br&gt;
I did something like this but it still doesn&#39;t work

    &lt;c:forEach var=&quot;map&quot; items=&quot;${requestScope.key}&quot;&gt;
        &lt;c:forEach var=&quot;hash&quot; items=&quot;${map[&#39;key&#39;]}&quot;&gt;
            &lt;option&gt;&lt;c:out value=&quot;${hash}&quot;/&gt;&lt;/option&gt;
        &lt;/c:forEach&gt;
    &lt;/c:forEach&gt;

and the StackTrace: `Property &#39;External&#39; not found on type java.util.HashMap$Entry` &lt;br&gt;
I&#39;m pretty sure that there is really that kind of key.

Get value from hashmap based on key to JSTL

I have these values coming from a test

    previousTokenValues[1] = &quot;1378994409108&quot;
    currentTokenValues[1] = &quot;1378994416509&quot;

and I try

        // current timestamp is greater
        assertTrue(Long.parseLong(previousTokenValues[1]) &gt; Long.parseLong(currentTokenValues[1]));

I get the `java.lang.AssertionError` and `detailMessage` on debugging is `null`.

How can I assert greater than conditions in using `JUnit`

How to assert greater than using JUnit Assert?

In one of my interviews, I have been asked to explain the difference between an **Interface** and an **Abstract class**.

Here&#39;s my response:


&gt; Methods of a Java interface are implicitly abstract
 and cannot have implementations. A Java abstract class can have
 instance methods that implements a default behaviour.
 
&gt; Variables declared in a Java interface are by default final. An 
 abstract class may contain non-final variables.
 
&gt; Members of a Java interface are public by default. A Java abstract
 class can have the usual flavours of class members like private,
 protected, etc.
 
&gt; A Java interface should be implemented using keyword “implements”; A
Java abstract class should be extended using keyword “extends”.
 
&gt; An interface can extend another Java interface only, an abstract class
 can extend another Java class and implement multiple Java interfaces.

&gt; A Java class can implement multiple interfaces but it can extend only
 one abstract class.

However, the interviewer was not satisfied, and told me that this description represented &quot;*bookish knowledge*&quot;.

He asked me for a more practical response, explaining *when I would choose an abstract class over an interface, using practical examples*.

Where did I go wrong?

How should I have explained the difference between an Interface and an Abstract class?

I click &quot;download sources and documentation&quot; in Intellij Idea Community Edition 12.1.4 and get error that sources can not be downloaded.
But when I try:

    mvn dependency:sources

All sources are downloaded.

What is the problem?

**P.S.** I have checked that Idea use the same maven that use in console. There are not any &quot;off line&quot; mode buttons triggered in Idea.

Can not download sources with Intellij Idea community 12.1.4 and maven 3.0.5

We&#39;re creating a new project in IntelliJ and must have something wrong because when we right click on a directory, select *New* and then get the context menu, Java based options are not shown. Currently get things like File, some HTML options, XML options.

We have assumed so far it&#39;s something we haven&#39;t configured correctly in the Project/Module configuration. The new module we are talking about is part of a multi module project. We created it using a Maven web archetype.

Any help configuring the project nature?

**Edit: The answer is basic:** _&#39;That moment when you realise somethings not working because you haven&#39;t been clicking &#39;Apply&#39;... :) We had a good laugh at ourselves when we discovered this&#39;_

IntelliJ does not show &#39;Class&#39; when we right click and select &#39;New&#39;

I&#39;m trying to set up IntelliJ IDEA for programming android but I can&#39;t render the main.xml.

&gt; org.jetbrains.android.uipreview.RenderingException: This version of
&gt; the rendering library is more recent than your version of IntelliJ
&gt; IDEA. Please update IntelliJ IDEA 	at
&gt; org.jetbrains.android.uipreview.RenderServiceFactory.loadLibrary(RenderServiceFactory.java:158)
&gt; 	at
&gt; org.jetbrains.android.uipreview.RenderServiceFactory.create(RenderServiceFactory.java:73)
&gt; 	at
&gt; org.jetbrains.android.sdk.AndroidTargetData.getRenderServiceFactory(AndroidTargetData.java:132)
&gt; 	at
&gt; org.jetbrains.android.uipreview.RenderUtil.renderLayout(RenderUtil.java:105)
&gt; 	at
&gt; com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$8.run(AndroidDesignerEditorPanel.java:346)
&gt; 	at
&gt; com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
&gt; 	at
&gt; com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
&gt; 	at
&gt; com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
&gt; 	at
&gt; com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
&gt; 	at
&gt; com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
&gt; 	at
&gt; com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
&gt; 	at com.intellij.util.Alarm$Request$1.run(Alarm.java:289) 	at
&gt; java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
&gt; 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
&gt; 	at java.util.concurrent.FutureTask.run(FutureTask.java:166) 	at
&gt; java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
&gt; 	at
&gt; java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
&gt; 	at java.lang.Thread.run(Thread.java:722)

![enter image description here][1]

This is the exception I get when I try to open the main.xml with the Android GUI Designer (IntelliJ Utility). I have the latest IDE version so I don&#39;t know what&#39;s happening here.

  [1]: http://i.stack.imgur.com/R9Xwu.jpg

IntelliJ IDEA Render error

Hey there I&#39;ve been using the JetBrains IDE support extension for a week now, and While it is great utility. I grow tired of clicking the &quot;X&#39; in the Chrome Yellow Warning (&quot;JetBrains IDE Support&quot; is debugging this tab.)

This may be a noobish question for experienced devs, but does anyone knows how to get rid of this Chrome pop-ups?

Thanks :)

Here is a snapshot: 

![enter image description here][1]


  [1]: http://i.stack.imgur.com/vkbJB.png

JetBrains IDE Support Extension - How to disable Chrome Warnings?

When I try to compile any class in my project I get the error below:

    Error scala: Output path .../eval/target/test-classes is shared between: Module &#39;eval&#39; tests, Module &#39;eval&#39; tests
          Output path .../eval/target/classes is shared between: Module &#39;eval&#39; production, Module &#39;eval&#39; production
          Please configure separate output paths to proceed with the compilation.

I&#39;ve seen how to set the output path in IDEA and I&#39;ve done it. But as the error claims that it is shared between the same module I couldn&#39;t solve it.

Obs.: Using Maven and IntelliJ IDEA.

Please, can anyone help?

Content Type	Original Author	Original Content on Stackoverflow
Question	Monwe	View Question on Stackoverflow
Solution 1 - Java	Ashutosh Jindal	View Answer on Stackoverflow
Solution 2 - Java	dzezzz	View Answer on Stackoverflow
Solution 3 - Java	only_me	View Answer on Stackoverflow
Solution 4 - Java	duffymo	View Answer on Stackoverflow
Solution 5 - Java	nick w.	View Answer on Stackoverflow
Solution 6 - Java	sitaktif	View Answer on Stackoverflow

IntelliJ IDEA 12 -- viewing the call stack

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Python send UDP packet

How to compare the contents of two string objects in PowerShell

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