change `create` to `generate`


    mvn archetype:generate -DgroupId=com.di.maven -DartifactId=hello-world -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

`mvn archetype:create` is deprecated in Maven 3.0.5 and beyond, [as mentioned in the documentation](http://maven.apache.org/archetype/maven-archetype-plugin/create-mojo.html)

Use `mvn archetype:generate` instead:

&gt; `mvn archetype:generate -DarchetypeArtifactId=maven-archetype-archetype`

This is an interactive command and will ask for values like `groupId`, `artifactId`, `version`, etc. You can also specify these values in the command and choose the non-interactive mode.

    mvn archetype:generate 
      -DgroupId=com.biswajit.maven 
      -DartifactId=com.biswajit.maven 
      -DarchetypeArtifactId=maven-archetype-quickstart 
      -DinteractiveMode=false


Create does not work in maven 3.0.X or beyond. So use generate instead of create

Add
   

        &lt;dependency&gt;
         &lt;groupId&gt;commons-lang&lt;/groupId&gt;
         &lt;artifactId&gt;commons-lang&lt;/artifactId&gt;
         &lt;version&gt;2.3&lt;/version&gt;
        &lt;/dependency&gt;

to your pom file in
  

     {user.home}/.m2/repository/org/apache/maven/plugins/maven-archetype-plugin/2.3

I just update Android Studio, and when I restarted it, the preview window rendering failed, and I was told that 

&gt;The following classes could not be found:
-&#160;android.support.v7.internal.widget.ActionBarOverlayLayout

If someone can tell me what can I do to fix this rendering problem? Thank you.

Android Studio Rendering Problems : The following classes could not be found

In the [following example](http://codepen.io/anon/pen/VYVPBJ), when `Item 2` is clicked, `Second 1` is shown instead of `Second 2`. Why? How would you fix that?

---

    var guid = 0;
    
    class Content extends React.Component {
      constructor() {
        guid += 1;
        this.id = guid;
        console.log(&#39;ctor&#39;, this.id); // called only once with 1
      }
      render() {
        return (
          &lt;div className=&quot;content&quot;&gt;
          	{this.props.title} - {this.id}
          &lt;/div&gt;
        );
      }
    }
    
    class MyApp extends React.Component {
      constructor() {
        this.items = [&#39;Item 1&#39;, &#39;Item 2&#39;];
        this.state = {
          activeItem: this.items[0]
        };
      }
      onItemClick(item) {
        this.setState({
          activeItem: item
        });
      }
      renderMenu() {
        return (
          &lt;div className=&quot;menu&quot;&gt;
            &lt;div onClick={this.onItemClick.bind(this, &#39;Item 1&#39;)}&gt;Item 1&lt;/div&gt;
            &lt;div onClick={this.onItemClick.bind(this, &#39;Item 2&#39;)}&gt;Item 2&lt;/div&gt;
          &lt;/div&gt;
        );
      }
      renderContent() {
        if (this.state.activeItem === &#39;Item 1&#39;) {
          return (
            &lt;Content title=&quot;First&quot; /&gt;
          );
        } else {
          return (
            &lt;Content title=&quot;Second&quot; /&gt;
          );
        }
      }
      render() {
        return (
          &lt;div&gt;
          	{this.renderMenu()}
            {this.renderContent()}
          &lt;/div&gt;
        );
      }
    }
    


React: Why component&#39;s constructor is called only once?

I am looking at few maven tutorial videos and then I ran into this command after installing maven:

    mvn archetype:create -DgroupId=com.di.maven -DartifactId=hello-world

The build fails and throws the following error:

&lt;!-- language: none --&gt;

    Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.3:create 
    (default-cli) on project standalone-pom: Unable to parse configuration of mojo 
    org.apache.maven.plugins:maven-archetype-plugin:2.3:create for parameter #: Abstract 
    class or interface &#39;org.apache.maven.artifact.repository.ArtifactRepository&#39; cannot be 
    instantiated -&gt; [Help 1]

What is the reason and how can I fix it? I am running as an user in Ubuntu.

Unable to create a new maven hello-world project

I am looking at few maven tutorial videos and then I ran into this command after installing maven:
<pre><code class="hljs language-ini">mvn archetype:create -DgroupId=com.di.maven -DartifactId=hello-world
</code></pre>
The build fails and throws the following error:

<pre><code class="hljs language-vbnet">Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.3:create 
(default-cli) on project standalone-pom: Unable to parse configuration of mojo 
org.apache.maven.plugins:maven-archetype-plugin:2.3:create for parameter #: Abstract 
class or interface 'org.apache.maven.artifact.repository.ArtifactRepository' cannot be 
instantiated -> [Help 1]
</code></pre>
What is the reason and how can I fix it? I am running as an user in Ubuntu.

I&#39;m trying to map some Java classes using the Hibernate JPA implementation. My problem is that I can&#39;t use hardcoded Strings als column namens. You can see the error message I get in the picture below.


![enter image description here][1]


I&#39;m using OpenJPA as my Default JPA Provider and have already tried to change it.

IntelliJ Version 14.0.3


regards,


  [1]: http://i.stack.imgur.com/YRUbK.png

JPA Cannot resolve column/IntelliJ

How do I convert a LocalDate to a `java.sql.Date`?

Attempt:

    Record r = new Record();
    LocalDate date = new Date(1967, 06, 22);
    r.setDateOfBirth(new Date(date));

This fails _(won&#39;t compile)_ and all I can find is Joda time stuff.

I&#39;m using Java 8

How to convert LocalDate to SQL Date Java?

I am trying to test a service class, which internally makes use of a Spring AMQP connection object.  This connection object is injected by Spring.  However, I don&#39;t want my unit test to actually communicate with the AMQP broker, so I am using Mockito inject a mock of the connection object.
    
&lt;!-- language: java --&gt;

    /** 
     * The real service class being tested.  Has an injected dependency. 
     */ 
    public class UserService {
    
       @Autowired
       private AmqpTemplate amqpTemplate;
    
       public final String doSomething(final String inputString) {
          final String requestId = UUID.randomUUID().toString();
          final Message message = ...;
          amqpTemplate.send(requestId, message);
          return requestId;
       }
    }
    
    /** 
     * Unit test 
     */
    public class UserServiceTest {
    
       /** This is the class whose real code I want to test */
       @InjectMocks
       private UserService userService;

       /** This is a dependency of the real class, that I wish to override with a mock */
       @Mock
       private AmqpTemplate amqpTemplateMock;
    
       @Before
       public void initMocks() {
          MockitoAnnotations.initMocks(this);
       }
    
       @Test
       public void testDoSomething() {
          doNothing().when(amqpTemplateMock).send(anyString(), any(Message.class));

          // Call the real service class method, which internally will make 
          // use of the mock (I&#39;ve verified that this works right).
          userService.doSomething(...);

          // Okay, now I need to verify that UUID string returned by 
          // &quot;userService.doSomething(...) matches the argument that method 
          // internally passed to &quot;amqpTemplateMock.send(...)&quot;.  Up here 
          // at the unit test level, how can I capture the arguments passed 
          // to that inject mock for comparison?
          //
          // Since the value being compared is a UUID string created 
          // internally within &quot;userService&quot;, I cannot just verify against 
          // a fixed expected value.  The UUID will by definition always be
          // unique.
       }
    }

The comments in this code sample hopefully lay out the question clearly.  When Mockito injects a mock dependency into a real class, and unit tests on the real class cause it to make calls to the mock, how can you later retrieve the exact arguments that were passed to the injected mock?


How can Mockito capture arguments passed to an injected mock object&#39;s methods?

I used to define a set of related constants like `Bundle` keys together in an interface like below:

    public interface From{
        String LOGIN_SCREEN = &quot;LoginSCreen&quot;;
        String NOTIFICATION = &quot;Notification&quot;;
        String WIDGET = &quot;widget&quot;;
    }
This provides me a nicer way to group related constants together and used them by making a static import (not implements). I know `Android` framework also uses the constants in same way like `Toast.LENTH_LONG`, `View.GONE`.

However, I often feel that the `Java Enums` provide much better and powerful way to represent the constant.

But is there a performence issue in using `enums` on `Android`?

With a bit of research I ended up in confusion. From this question 
[&quot;Avoid Enums Where You Only Need Ints” removed from Android&#39;s performance tips?][1] it&#39;s clear that `Google` has removed _&quot;Avoid enums&quot;_ from its performance tips, but from it&#39;s official training docs [Be aware of memory overhead][2] section it clearly says: _&quot;Enums often require more than twice as much memory as static constants. You should strictly avoid using enums on Android.&quot;_ Is this still holds good? (say in `Java` versions after 1.6)

One more issue that I observed is to send `enums` across `intents` using `Bundle` I should send them by serializing (i.e `putSerializable()`, that I think an expensive operation compared to primitive `putString()` method, eventhough `enums` provides it for free).

  [1]: https://stackoverflow.com/questions/5143256/why-was-avoid-enums-where-you-only-need-ints-removed-from-androids-performanc
  [2]: http://developer.android.com/training/articles/memory.html#Overhead

Can someone please clarify which one is the best way to represent the same in `Android`? Should I strictly avoid using `enums` on `Android`?

Should I strictly avoid using enums on Android?

I am pretty new to Tomcat and Docker - so I am probably missing a Tomcat fundamental somewhere in this question.

What I am trying to do is build a Docker container that runs a SpringBoot Restful web service that just returns some static data. This is all running on OSX so I am using Boot2Docker as well.

I&#39;ve written my own Dockerfile to build the container that my app runs in:
    
    FROM tomcat:8.0.20-jre8

    RUN mkdir /usr/local/tomcat/webapps/myapp

    COPY /1.0-SNAPSHOT/my-app-1.0-SNAPSHOT.war /usr/local/tomcat/webapps/myapp/

This Dockerfile works fine and I am able to start the container from the created image. 
    
    docker build -t myapp .

    docker run -it --rm -p 8888:8080 myapp

This container starts correctly and outputs no errors and displays the message saying my app was deployed.

    22-Mar-2015 23:07:21.217 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory 
    Deploying web application directory /usr/local/tomcat/webapps/myapp

The container also correctly has the myapp.war copied to the path described in the Dockerfile. Moreover I am able to navigate to Tomcat default page to confirm that Tomcat is running, I can also hit all the examples, etc.

To the problem, when I navigate to http://192.168.59.103:8888/myapp/getData I get a 404. I can&#39;t quite figure out why. Am I missing something regarding a .war deploy to Tomcat?


Deploying Java webapp to Tomcat 8 running in Docker container

I installed maven by following this steps:(a tutorial)

    JAVA_HOME=/Library/Java/Home
    export M2_HOME=/Users/steven/zimmermann/maven
    export M2=$M2_HOME/bin
    export PATH=$M2:$PATH

    echo $JAVA_HOME
    echo $M2_HOME
    echo $M2
    echo $PATH

    nano .bash_profile

then I wrote the echo in the .bash_profile sth like this:

    JAVA_HOME=/usr/libexec/java_home
    M2_HOME=/path/to/your/apache-maven-3.x.x
    M2=/path/to/your/apache-maven-3.x.x/bin
    PATH=/path/to/maven/bin:/$….bla-bla-bla…

and also I wrote this in the .bashrc

    export M2_HOME=/Users/steven/zimmermann/maven
    export M2=$M2_HOME/bin
    export PATH=$M2:$PATH

now when I want to check the version (`mvn -v`) I get the following exception:
I think there are some versions wrong, but I don&#39;t know. 

    Exception in thread &quot;main&quot; java.lang.UnsupportedClassVersionError: org/apache/maven/cli/MavenCli : Unsupported major.minor version 51.0
    	at java.lang.ClassLoader.defineClass1(Native Method)
    	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
    	at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
    	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    	at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    	at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:401)
    	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
    	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
    	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:254)
    	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
    	at org.codehaus.plexus.classworlds.launcher.Launcher.getMainClass(Launcher.java:144)
    	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:266)
    	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Additional information:

    java -version

&gt;     java version &quot;1.8.0_40&quot;
    Java(TM) SE Runtime Environment (build 1.8.0_40-b27)
    Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)

    javac -version

&gt;     javac 1.8.0_40


Maven Installation OSX Error Unsupported major.minor version 51.0

I&#39;m using maven in IntelliJ, JDK1.8, maven 3.2.5. Got compilation error: use -source 7 or higher to enable diamond opera. details are as follows: 

      [ERROR] COMPILATION ERROR : 
      [INFO] -------------------------------------------------------------
      [ERROR] TrainingConstructor.java:[31,55] diamond operator is not supported in -source 1.5 (use -source 7 or higher to enable diamond operator)
      [ERROR] DTM.java:[79,21] try-with-resources is not supported in -source 1.5  (use -source 7 or higher to enable try-with-resources)
      [ERROR] ticons.java:[53,44] diamond operator is not supported in -source 1.5  (use -source 7 or higher to enable diamond operator)

Any suggestions? Is there any other configuration to set this -source level? seems it doesn&#39;t use java 1.8. 

Maven Compilation Error: (use -source 7 or higher to enable diamond operator)

I just installed Maven 3.3.1 on Mac OS X, and building a Maven Project with Eclipse is giving me this error:
 
    -Dmaven.multiModuleProjectDirectory system property is not set.
    Check $M2_HOME environment variable and mvn script match.


It did not happen before with Maven 3.2.5.

Is there any way to fix this (except downgrading to 3.2.5) ?

Where exactly can I set this &quot;multiModuleProjectDirectory&quot; property in Eclipse?

Maven 3.3.1 ECLIPSE: -Dmaven.multiModuleProjectDirectory system propery is not set

I recently found out that the lombok.jar ends up in our final artifact, which shouldn&#39;t be necessary. In my understanding lombok is compile-time only.

            &lt;dependency&gt;
                &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
                &lt;artifactId&gt;lombok&lt;/artifactId&gt;
                &lt;version&gt;1.14.4&lt;/version&gt;
            &lt;/dependency&gt;

But when I set it to scope provided, I get strange behaviour in unit tests. They crash with ClassNotFoundExceptions then when trying to resolve 

    java.lang.NoClassDefFoundError: com/svv/esp/serviceimpl/dataimport/common/validation/LongValidator

Which maven scope is in general used for lombok?

I&#39;m using Oracle JDK build 1.8.0_25-b17 on MacOSX 10.9


Maven Scope for Lombok (Compile vs. Provided)

I have a module/jar that I&#39;ve created and am using as a util _**library**_. I created a service in there like so:

    @Service
    public class PermissionsService { ... }

... where this resides in a package here: **com.inin.architect.permissions** and in my main application, I&#39;m referencing/loading this jar (i.e. set as a dependency in the maven POM.xml file for the app) like so:

    &lt;dependency&gt;
            &lt;groupId&gt;com.inin.architect&lt;/groupId&gt;
            &lt;artifactId&gt;permissions&lt;/artifactId&gt;
            &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt;
        &lt;/dependency&gt;

 and within the application I want to use that service like:

    @Autowired
    PermissionsService permissions

In the application&#39;s spring setup, I&#39;ve got this:

    @Configuration
    @EnableWebMvc
    @ComponentScan(basePackages = { &quot;com.inin.generator&quot;, &quot;com.inin.architect.permissions&quot; })
    public class WebConfig extends WebMvcConfigurerAdapter implements ServletContextAware { }

However when I run my application under tomcat, it complains that there isn&#39;t a bean for the **PermissionsService**: &quot;org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ...&quot;

So, how can I bring over the bean from the lib into my application? Surely there&#39;s a way. Do you have to set the library up as a full blown spring MVC application so that this can work? i.e. do you have to have @Configuration and @ComponentScan setup in the lib as well?





Content Type	Original Author	Original Content on Stackoverflow
Question	London guy	View Question on Stackoverflow
Solution 1 - Java	Ahmet Karakaya	View Answer on Stackoverflow
Solution 2 - Java	Suresh	View Answer on Stackoverflow
Solution 3 - Java	user5458751	View Answer on Stackoverflow
Solution 4 - Java	Sidhant101	View Answer on Stackoverflow

Unable to create a new maven hello-world project

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Solution 4 - Java

React: Why component's constructor is called only once?

Android Studio Rendering Problems : The following classes could not be found

Attributions