Required mininum version: **IntelliJ IDEA 2018.2 EAP**

    IntelliJ IDEA 2018.2 EAP (Ultimate Edition)
    Build #IU-182.2371.4, built on May 15, 2018
    JRE: 1.8.0_152-release-1226-b7 x86_64


&gt; ability to specify the default directory for opening projects. In the
&gt; **Preferences | Appearance &amp; Behavior | System Settings** in the Project
&gt; Opening section there is a new **Default directory** field where you can
&gt; set a directory.

direct link to open settings:
[jetbrains://idea/settings?name=Appearance+%26+Behavior--System+Settings][1]

[![enter image description here][2]][2]

more:

 - https://blog.jetbrains.com/idea/2018/05/intellij-idea-2018-2-early-access-program-is-open/ (at the end)

 - https://youtrack.jetbrains.com/issue/IDEA-84622


  [1]: jetbrains://idea/settings?name=Appearance%20%26%20Behavior--System%20Settings
  [2]: https://i.stack.imgur.com/bQS0Y.png

It&#39;s not possible yet (IDEA 16 EAP 144.4199), or the remembering has been disabled for some reason.

I opened https://youtrack.jetbrains.com/issue/IDEA-152061.

**UPDATE** the above issue has been fixed and IDEA now remembers last project location.

Vote for https://youtrack.jetbrains.com/issue/IDEA-151727 to have a configuration entry.

 - Intellij&#39;s Project is equivalent to an Eclipse Workspace 
 - Intellij&#39;s Modules are equivalent to Eclipse Projects

Instead of creating different projects in IntelliJ ( &amp; consequently having to change project locations), create new modules within the same project. Just remember to increase the memory settings for the IDE since all the modules within the same project share the memory space. 

You can learn more about this from the IntelliJ [help section][1] 


  [1]: http://confluence.jetbrains.com/display/IntelliJIDEA/Project+Organization

I&#39;m trying to send value into function using reference pointer but it gave me a completely non-obvious error

    #include &quot;stdafx.h&quot;
    #include &lt;iostream&gt;
    
    using namespace std;
    
    void test(float *&amp;x){
    	
    	*x = 1000;
    }
    
    int main(){
    	float nKByte = 100.0;
    	test(&amp;nKByte);
    	cout &lt;&lt; nKByte &lt;&lt; &quot; megabytes&quot; &lt;&lt; endl;
    	cin.get();
    }

&gt; Error : initial value of reference to non-const must be an lvalue

I have no idea what I must do to repair above code, can someone give me some ideas on how to fix that code?

initial value of reference to non-const must be an lvalue

I&#39;m trying to parse a CSV string to an array in PHP. The CSV string has the following attributes:

&lt;!-- language: lang-none --&gt;

    Delimiter: ,
    Enclosure: &quot;
    New line: \r\n

Example content:

    &quot;12345&quot;,&quot;Computers&quot;,&quot;Acer&quot;,&quot;4&quot;,&quot;Varta&quot;,&quot;5.93&quot;,&quot;1&quot;,&quot;0.04&quot;,&quot;27-05-2013&quot;
    &quot;12346&quot;,&quot;Computers&quot;,&quot;Acer&quot;,&quot;5&quot;,&quot;Decra&quot;,&quot;5.94&quot;,&quot;1&quot;,&quot;0.04&quot;,&quot;27-05-2013&quot;

When I try to parse it like this:

    $url = &quot;http://www.url-to-feed.com&quot;;
    $csv = file_get_contents($url);
    $data = str_getcsv($csv);
    var_dump($data);

The last and first element are concatenated in one string:

    [0]=&gt; string(5) &quot;12345&quot;
    ...
    [7]=&gt; string(4) &quot;0.04&quot;
    [8]=&gt; string(19) &quot;27-05-2013
    &quot;12346&quot;&quot;

How can I fix this? Any help would be appreciated.


PHP CSV string to array

I&#39;m wondering if there is a way to set the default location for all IntelliJ projects, something similar to the workspace concept in Eclipse?

Because I always need to change the IDEA project location when I create a new project.

How can I set default project location for all projects in IntelliJ IDEA?

<p>I'm wondering if there is a way to set the default location for all IntelliJ projects, something similar to the workspace concept in Eclipse?</p>
<p>Because I always need to change the IDEA project location when I create a new project.</p>


I need to remove trailing zeros from `BigDecimal` along with `RoundingMode.HALF_UP`. For instance,

    Value        Output
    
    15.3456  &lt;=&gt; 15.35
    15.999   &lt;=&gt; 16            //No trailing zeros.
    15.99    &lt;=&gt; 15.99
    15.0051  &lt;=&gt; 15.01
    15.0001  &lt;=&gt; 15           //No trailing zeros.
    15.000000&lt;=&gt; 15           //No trailing zeros.
    15.00    &lt;=&gt; 15           //No trailing zeros.

[`stripTrailingZeros()`][1] works but it returns scientific notations in situations like,

    new BigDecimal(&quot;600.0&quot;).setScale(2, RoundingMode.HALF_UP).stripTrailingZeros();

In this case, it returns `6E+2`. I need this in a custom converter in JSF where it might be ugly for end users. So, what is the proper way of doing this?


  [1]: https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html#stripTrailingZeros--

Removing trailing zeros from BigDecimal in Java

I have the following `if` condition.

    if (i == -i &amp;&amp; i != 0)

What value of `i` will return `true` for this condition in Java?

I am unable to think of any such value of `i` considering [two&#39;s complement][1] notation in Java.

I would also love to have algebraic proof of whatever answer this condition has (in context with Java)?

  [1]: http://en.wikipedia.org/wiki/Two%27s_complement


Value of i for (i == -i &amp;&amp; i != 0) to return true in Java

Can anyone explain what does Java do when `_JAVA_OPTIONS` Environment variable defined &amp; when application launched on the windows machine? 

Information about _JAVA_OPTIONS

I have a problem resetting hours in Java. For a given date I want to set the hours to 00:00:00.

This is my code : 

    /**
         * Resets milliseconds, seconds, minutes and hours from the provided date
         *
         * @param date
         * @return
         */
        public static Date trim(Date date) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.HOUR, 0);
    
            return calendar.getTime();
        }


The problem is that sometimes the time is `12:00:00` and sometimes it is `00:00:00` and when I query the database for an entity that was saved on `07.02.2013 00:00:00` and the actual entity time, that is stored, is `12:00:00` the query fails. 

I know that `12:00:00 == 00:00:00`! 

I am using AppEngine. Is this an appengine bug, problem or some other issue?  Or does it depend on something else?

Set time to 00:00:00

Can someone help me to understand what Java `CountDownLatch` is and when to use it? 

I don&#39;t have a very clear idea of how this program works. As I understand all three threads start at once and each Thread will call CountDownLatch after 3000ms. So count down will decrement one by one. After latch becomes zero the program prints &quot;Completed&quot;. Maybe the way I understood is incorrect. 

&lt;!-- language-all: java --&gt;

    import java.util.concurrent.CountDownLatch;
    import java.util.concurrent.ExecutorService;
    import java.util.concurrent.Executors;
         
    class Processor implements Runnable {
        private CountDownLatch latch;
         
        public Processor(CountDownLatch latch) {
            this.latch = latch;
        }
         
        public void run() {
            System.out.println(&quot;Started.&quot;);
             
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
             
            latch.countDown();
        }
    }

 // -----------------------------------------------------

    public class App {
    	 
    	public static void main(String[] args) {
    		 
    		CountDownLatch latch = new CountDownLatch(3); // coundown from 3 to 0
    		 
    		ExecutorService executor = Executors.newFixedThreadPool(3); // 3 Threads in pool
    		 
    		for(int i=0; i &lt; 3; i++) {
    		    executor.submit(new Processor(latch)); // ref to latch. each time call new Processes latch will count down by 1
    		}
    
    		try {
    		    latch.await();  // wait until latch counted down to 0
    		} catch (InterruptedException e) {
    		    e.printStackTrace();
    		}
    		 
    		System.out.println(&quot;Completed.&quot;);
    	}
    	 
    }

How is CountDownLatch used in Java Multithreading?

I am using `Android Studio/IntelliJ` to build on an existing `Android` project and would like to add some simple `JUnit` unit tests. What is the right folder to add such tests on?

The android `Gradle` plug-in defines a directory structure with `src/main/java` for the main source code and `src/instrumentTest/java` for `Android` tests. 

Trying to add my JUnit tests in instrumentTest didn&#39;t work for me. I can run it as an `Android` test (that&#39;s what that directory seems for) but that&#39;s not what I&#39;m looking for - I just want to run a simple `JUnit` test.
I tried creating a JUnit run configuration for this Class but that also didn&#39;t work - I&#39;m supposing because I&#39;m using a directory that is flagged as `Android` Test instead of Source.

If I create a new source folder and marki it as such in Project Structure, this will get wiped next time `IntelliJ` refreshes the project configuration from the gradle build files.

What is the more appropriate way of configuring JUnit tests in an gradle-based android project on `IntelliJ`? Which directory structure to use for this?

Running simple JUnit tests on Android Studio (IntelliJ) when using a Gradle-based configuration

Is it possible in Intellij IDEA after typing &#39;;&#39; or press &#39;Enter&#39; happened formatting of this string?

For instance,
to:

    a+b=10;

after:

    a + b = 10;

Or only possible option: *Code &gt; Reformat Code...*?

Thank you!

How enable auto-format code for Intellij IDEA?

I created a project, copied the resource files in the project, library, added it to the project structure, prescribed style `Theme.AppCompat`.
Compiled without errors, but when you start the relegation Exception:

    08-03 00:50:00.406: ERROR/AndroidRuntime(4055): FATAL EXCEPTION: main
            java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$styleable
            at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:98)
            at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:58)
            at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98)
            at com.example.SampleMetrRost.CentralActivity.onCreate(CentralActivity.java:12)
            at android.app.Activity.performCreate(Activity.java:4636)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1051)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1924)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985)
            at android.app.ActivityThread.access$600(ActivityThread.java:127)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4476)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:816)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:583)
            at dalvik.system.NativeStart.main(Native Method)

Help me, please. Spent all day today.


How do I add a library (android-support-v7-appcompat) in IntelliJ IDEA

I like intellij&#39;s code/file templates, they are working really well for me for single files but it would be great to be able to create multiple files/classes at once.

I did find [this question](https://stackoverflow.com/questions/8142937/does-intellij-support-any-kind-of-templating-to-create-multiple-files-automatica) but since it has been a few years since I was hoping that things might have changed.

We are using the mvp pattern in our application so every time we want to create a new view, it requires two classes and two interfaces, which are always in the same pattern. It would be awesome if we could generate all of the infrastructure for this and link up the classes.

Any suggestions or new information would be appreciated?
Maybe it is time to log a feature request with [JetBrains](http://www.jetbrains.com)?

Is there a way to generate multiple files/classes with intellij code/file templates?

I want to add the `-ea` option. I set it in `Project Settings` --&gt; `Compiler` --&gt; `Java Compiler` : `Additional command line parameters`.  
  
But it caused a make error: `invalid flag: -ea`.
P.S.: the above error message may not be the same as yours, because IntelliJ showed error in my native language, not English. I translated it into English.

Where to add compiler options like -ea in IntelliJ IDEA?

Whenever I create a new project in `Android Studio` it wants to put it in a generic default folder at a location something similar to (dependent on OS - Ubuntu here):

    /home/USER/AndroidStudioProjects/

I want to change this directory to another location. Besides selecting this new location on the creation of every project, is there a setting (couldn&#39;t find) or `path variable` (couldn&#39;t find any documentation) that can set this directory (say `/home/USER/Projects/AndroidStudio/`) as the default?

Something similar to changing the workspace in Eclipse is what I am looking for.

Android Studio: Default project directory

After updating the Android SDK, I started Android Studio. Now its showing background task continuously running with message 

&gt; Updating indices: Scanning files to index.

In this mode, it is nearly hanged and I can not work on it. Not able to find a way to stop background task. A restart of Android Studio didn&#39;t work either.

Android Studio: Background task running indefinitely

I am currently migrating an Eclipse app to Android Studio.
This app was using the in app billing.

My main problem is to compile the project and the aidl file (I guess you all use [this file][1])

I get this error message: 

    Gradle: error: cannot find symbol class IInAppBillingService
    Gradle: error: package IInAppBillingService does not exist

So, following some tutorials, I move this file from com.mypackage.billing to src/main/aidl
(see [this reference][2])

But as soon, as I do that, I get this message:

&gt; Gradle: Execution failed for task &#39;:xxxxxxxxxxx:compileDebugAidl&#39;.
&gt; &gt; Failed to run command:
&gt;         (...) 	C:\Users\xxxx\AndroidStudioProjects\xxxxxxProject\xxxxxxx\src\main\aidl\IInAppBillingService.aidl:45
&gt; interface IInAppBillingService should be declared in a file called
&gt; com\xxxxxxxx\billing\IInAppBillingService.aidl.

The message is clearly a contradiction with the post from the Google bug page I linked above.

Anyone suceeded to make this aidl file to work and can help me?

![enter image description here][3]

Just to inform, some links I followed:

 - http://tools.android.com/tech-docs/new-build-system/user-guide
 - http://developer.android.com/guide/components/aidl.html


  [1]: http://stuff.mit.edu:8001/afs/sipb.mit.edu/project/android/sdk/android-sdk-linux/extras/google/play_billing/IInAppBillingService.aidl
  [2]: https://code.google.com/p/android/issues/detail?id=56328
  [3]: http://i.stack.imgur.com/daRec.png

how can I add the aidl file to Android studio (from the in-app billing example)

I&#39;m starting to develop for Android. Which IDE should I use - Android Studio or Eclipse sdk?
I would like to know which one is better.

Content Type	Original Author	Original Content on Stackoverflow
Question	MainstreamDeveloper00	View Question on Stackoverflow
Solution 1 - Java	Lukas M.	View Answer on Stackoverflow
Solution 2 - Java	TWiStErRob	View Answer on Stackoverflow
Solution 3 - Java	Gurushya	View Answer on Stackoverflow

How can I set default project location for all projects in IntelliJ IDEA?

Java Problem Overview

Java Solutions

Solution 1 - Java

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Solution 3 - Java

PHP CSV string to array

initial value of reference to non-const must be an lvalue

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