The `-ea` option to enable assertions is passed to the JVM not to the compiler. Add it as a VM option for your runtime configuration.

Specific location in the menu: _Run &gt; Edit Configurations... &gt; Configuration &gt; VM options_:

[![Where to put the `-ea` flag][1]][1]


  [1]: https://i.stack.imgur.com/d1ZoO.png

You can also make IntelliJ IDEA support assertions by default by changing the default Application configuration:

In the top menu, press _Run &gt; Edit Configurations &gt; Defaults &gt; Application &gt; VM options_.

To enable the assertion feature for all application, you could just fill the `VM options` with `-ea`


For IntelliJ IDEA 2020.3:
- Run -&gt; Edit Configurations... -&gt; Modify options -&gt; Add VM options.
- Input `-ea` then click OK button. 

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/SwyLW.png

Build, Execution, Deployment -&gt; Compiler -&gt; Java Compiler -&gt; Override compiler parameters per-module -&gt; + 

Your project name is module name. And add `-ea` to the `Compilation options` for `javac`

It works for IDEA 2021.2, Fedora linux x86_64, OpenJDK  1.8 64bit

Bower&#39;s website describes the `ignore` key in bower.json:

&gt; `ignore` [array]: An array of paths not needed in production that you want Bower to ignore when installing your package.

Does this mean that it&#39;s ignoring paths in installed components, or in your package? Or something else? I was confused by this.

&quot;ignore&quot; in Bower&#39;s bower.json?

When I run the code below:

	cmd := exec.Command(&quot;find&quot;, &quot;/&quot;, &quot;-maxdepth&quot;, &quot;1&quot;, &quot;-exec&quot;, &quot;wc&quot;, &quot;-c&quot;, &quot;{}&quot;, &quot;\\&quot;)
	var out bytes.Buffer
	cmd.Stdout = &amp;out
	err := cmd.Run()
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(&quot;Result: &quot; + out.String())

I am getting this error:

&gt; exit status 1

However this is not helpful to debug the exact cause of the error.

How to get more detailed information?

How to debug &quot;exit status 1&quot; error when running exec.Command in Golang

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?

<p>I want to add the <code>-ea</code> option. I set it in <code>Project Settings</code> --> <code>Compiler</code> --> <code>Java Compiler</code> : <code>Additional command line parameters</code>.</p>
<p>But it caused a make error: <code>invalid flag: -ea</code>.
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.</p>


I am reading about generic methods from [OracleDocGenericMethod][1]. I am pretty confused about the comparison when it says when to use wild-card and when to use generic methods.
Quoting from the document.

&gt;     interface Collection&lt;E&gt; {
&gt;         public boolean containsAll(Collection&lt;?&gt; c);
&gt;         public boolean addAll(Collection&lt;? extends E&gt; c);
&gt;     }
&gt; 
&gt; We could have used generic methods here instead:
&gt; 
&gt;     interface Collection&lt;E&gt; {
&gt;         public &lt;T&gt; boolean containsAll(Collection&lt;T&gt; c);
&gt;         public &lt;T extends E&gt; boolean addAll(Collection&lt;T&gt; c);
&gt;         // Hey, type variables can have bounds too!
&gt;     }
&gt; […]
&gt; This tells us that the type argument is being used for polymorphism;
&gt; its only effect is to allow a variety of actual argument types to be
&gt; used at different invocation sites. If that is the case, one should
&gt; use wildcards. Wildcards are designed to support flexible subtyping,
&gt; which is what we&#39;re trying to express here.

Don&#39;t we think wild card like `(Collection&lt;? extends E&gt; c);` is also supporting kind of
polymorphism? Then why generic method usage is considered not good in this?

  [1]: http://docs.oracle.com/javase/tutorial/extra/generics/methods.html

Continuing ahead, it states,

&gt; Generic methods allow type parameters to be used to express
&gt; dependencies among the types of one or more arguments to a method
&gt; and/or its return type. If there isn&#39;t such a dependency, a generic
&gt; method should not be used.

What does this mean?

They have presented the example

&gt;     class Collections {
&gt;         public static &lt;T&gt; void copy(List&lt;T&gt; dest, List&lt;? extends T&gt; src) {
&gt;         ...
&gt;     }
&gt; 
&gt; […]
&gt;
&gt; We could have written the signature for this method another way,
&gt; without using wildcards at all:
&gt; 
&gt;     class Collections {
&gt;         public static &lt;T, S extends T&gt; void copy(List&lt;T&gt; dest, List&lt;S&gt; src) {
&gt;         ...
&gt;     }

The document discourages the second declaration and promotes usage of first syntax? What&#39;s the difference between the first and second declaration? Both seems to be doing the same thing?

Can someone put light on this area.



When to use generic methods and when to use wild-card?

I have a piece of code with three `RadioButton`s within a `RadioGroup`. I want to set an `onCheckedListener` that will show the value of the `RadioButton` in a `Toast`. However what I have gotten so far is not working. How do I get the value of the `RadioButton` and display it in a `Toast`? This is my code:

    import android.os.Bundle;
    import android.app.Activity;
    import android.view.Menu;
    import android.view.View;
    import android.widget.RadioButton;
    import android.widget.RadioGroup;
    import android.widget.RadioGroup.OnCheckedChangeListener;
    import android.widget.Toast;

    public class MainActivity extends Activity {

        RadioGroup rg;

	    @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
	
            RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);
            final String value =
                ((RadioButton)findViewById(rg.getCheckedRadioButtonId()))
                .getText().toString();
	
            rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                public void onCheckedChanged(RadioGroup group, int checkedId) {
            	    Toast.makeText(getBaseContext(), value, Toast.LENGTH_SHORT).show();
                }
            });
        }
    }

XML file:

    &lt;RelativeLayout 
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        android:paddingBottom=&quot;@dimen/activity_vertical_margin&quot;
        android:paddingLeft=&quot;@dimen/activity_horizontal_margin&quot;
        android:paddingRight=&quot;@dimen/activity_horizontal_margin&quot;
        android:paddingTop=&quot;@dimen/activity_vertical_margin&quot;
        tools:context=&quot;.MainActivity&quot; &gt;

        &lt;RadioGroup
            android:id=&quot;@+id/radioGroup1&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_alignParentTop=&quot;true&quot;
            android:layout_centerHorizontal=&quot;true&quot;
            android:layout_marginTop=&quot;152dp&quot; &gt;

            &lt;RadioButton
                android:id=&quot;@+id/radio0&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:text=&quot;Choose 1&quot; /&gt;

             &lt;RadioButton
                android:id=&quot;@+id/radio1&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:text=&quot;Choose 2&quot; /&gt;

             &lt;RadioButton
                android:id=&quot;@+id/radio2&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:text=&quot;Choose 3&quot; /&gt;
         &lt;/RadioGroup&gt;
     &lt;/RelativeLayout&gt;

Android getting value from selected radiobutton

I want to write the body of a request with XML content-type but I don&#39;t know how with HttpClient Object ( http://hc.apache.org/httpclient-3.x/apidocs/index.html )

    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpPost httpRequest = new HttpPost(this.url);
    httpRequest.setHeader(&quot;Content-Type&quot;, &quot;application/xml&quot;);

And I don&#39;t know how to continue to write the body with my XML ...

Write in body request with HttpClient

I was wondering if it is a &quot;bad practice&quot; to use a `break` statement to exit a loop instead of fulfilling the loop condition?

I do not have enough insight in Java and the JVM to know how a loop is handled, so I was wondering if I was overlooking something critical by doing so.

The focus of this question: is there a specific performance overhead?

Is it bad practice to use break to exit a loop in Java?

Can anybody explain to me how annotations work internally in java?

I know how we can create custom annotations by using java.lang.annotation library in java. But I still don&#39;t get how it&#39;s working internally for example, the  @Override annotation.

I will be really thankful if anyone could explain that in detail.


How do annotations like @Override work internally in Java?

I have been messing around with Android Studio and so far I like most of what I have seen. One thing that has been annoying me though is this lack of &quot;Table of Contents&quot; for a class. I apologize for not knowing exactly what to call it. But what I am referring to is the dropdown menu in eclipse that lists all the methods, interfaces, classes and so on that are in that class file. This then allows you to jump to that position. This view is when you are in &quot;Package Explorer&quot; and click the arrow to the left of the class. This is one thing that makes me really miss eclipse. I know that you can easily search with `Ctrl+F` inside a document but I often forget the method names. I tried looking through [here](http://www.jetbrains.com/idea/docs/IntelliJIDEA_ReferenceCard.pdf) but to no avail. Just wondering if anyone knows some way to handle this. 

Android Studio/Intellij Idea: &quot;Table of Contents&quot; for a class

I have a JDK 1.7 project with a maven dependency to a local jar in my maven repo.

I&#39;m unable to build the project using Intellij, with the errors that a symbol cannot be found (the symbol is a class importing packages from the local jar)

But I can successfully build the project using &#39;mvn package&#39;.

I&#39;ve spent so much time looking for solutions, things I&#39;ve already done:

- Invalidated cache
- &#39;mvn clean install&#39; the local jar dependecy
- Marked to &#39;autoload snapshots&#39; in Intellij&#39;s maven configuration
- Reimpoted maven in Intellij
- Syncornized

This error happend to my couple of times before, but usually just closing the Intellij and /or doing the &#39;mvn clean install&#39; did the trick.

Please help.

Maven package works but Intellij&#39;s build fails

I&#39;m using BitBucket and I created a branch on another machine with IntelliJ and pushed it in to my repo. I can see the branch on the BitBucket site, but when I try to access the remote branch using IntelliJ on another machine I can&#39;t see the new branch when I go to `VCS -&gt; git -&gt; Remote Branches`. I tried doing a pull, but that only brought down the head changes (which currently points to master), and didn&#39;t update the remote branches list. Is there something you have to do to see the remote branches (besides Head and Master) in IntelliJ?

How do I get IntelliJ to see my remote git branches

I am trying to import a Gradle project into IntelliJ, and when I get to the `Gradle Home` textbox, it is not automatically populated, nor will typing in the path of `Gradle Home` result in a valid location - I have the `GRADLE_USER_HOME` environment variable set (to what I think is!) the correct path, and I have been able to successfully import this same project into Eclipse. Any suggestions?

How to define Gradle&#39;s home in IDEA?

I&#39;m migrating from Eclipse to Intellij Idea. One thing I couldn&#39;t figure out yet is autocompletion of the `@author` JavaDoc tag.
When typing `@a` in Eclipse, there are two proposals: 

    @author - author name
    @author

How do I achieve the first proposal in Intellij (is it even possible?)? And if it&#39;s possible, how do I change the template of what is inserted for the author name placeholder?

Content Type	Original Author	Original Content on Stackoverflow
Question	duleshi	View Question on Stackoverflow
Solution 1 - Java	Dev	View Answer on Stackoverflow
Solution 2 - Java	neo	View Answer on Stackoverflow
Solution 3 - Java	Jimmy_Rw	View Answer on Stackoverflow
Solution 4 - Java	Nick Dong	View Answer on Stackoverflow

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

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Solution 4 - Java

How to debug "exit status 1" error when running exec.Command in Golang

"ignore" in Bower's bower.json?

Attributions