To quote [Java 9&#39;s javadoc](https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#newInstance--):

&gt; The call
&gt;
&gt; `clazz.newInstance()`
&gt; 
&gt;can be replaced by
&gt;
&gt; `clazz.getDeclaredConstructor().newInstance()`

    Class.getDeclaredConstructor(...).newInstance(...)

Refer to [Google errorprone&#39;s documentation](http://errorprone.info/bugpattern/ClassNewInstance) (for example) for a description of why.

&gt; Unhandled Rejection (Error): Actions must be plain objects. Use custom middleware for async actions.

I wanted to add comments with every posts. So when fetch posts are run I want to call fetch comment API for all post.

    export function bindComments(postId) {
      return API.fetchComments(postId).then(comments =&gt; {
        return {
          type: BIND_COMMENTS,
          comments,
          postId
        }
      })
    }


React-Redux: Actions must be plain objects. Use custom middleware for async actions

I can sort my Kubernetes pods by name using:

    kubectl get pods --sort-by=.metadata.name

How can I sort them (or other resoures) by age using `kubectl`?

Kubernetes sort pods by age

`Class.newInstance()` is marked deprecated. Documentation does not suggest any alternatives. How are we meant to create instances now?

What to use instead of Class.newInstance()?

<p><code>Class.newInstance()</code> is marked deprecated. Documentation does not suggest any alternatives. How are we meant to create instances now?</p>


When installing the android sdk tools the following error is emitted:
&gt;java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema

Why is this happening and how can it be fixed?

Debug output:

    $ java --version
    java 9
    Java(TM) SE Runtime Environment (build 9+181)
    Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)
    $ brew cask install android-sdk
    ==&gt; Caveats
    We will install android-sdk-tools, platform-tools, and build-tools for you.
    You can control android sdk packages via the sdkmanager command.
    You may want to add to your profile:
      &#39;export ANDROID_SDK_ROOT=/usr/local/share/android-sdk&#39;
    
    This operation may take up to 10 minutes depending on your internet connection.
    Please, be patient.
    
    ==&gt; Satisfying dependencies
    ==&gt; Downloading https://dl.google.com/android/repository/sdk-tools-darwin-3859397.zip
    Already downloaded: /Users/tomasnovella/Library/Caches/Homebrew/Cask/android-sdk--3859397,26.0.1.zip
    ==&gt; Verifying checksum for Cask android-sdk
    ==&gt; Installing Cask android-sdk
    ==&gt; Exception in thread &quot;main&quot;
    ==&gt; java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
    ==&gt; 	at com.android.repository.api.SchemaModule$SchemaModuleVersion.&lt;init&gt;(SchemaModule.java:156)
    ==&gt; 	at com.android.repository.api.SchemaModule.&lt;init&gt;(SchemaModule.java:75)
    ==&gt; 	at com.android.sdklib.repository.AndroidSdkHandler.&lt;clinit&gt;(AndroidSdkHandler.java:81)
    ==&gt; 	at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:117)
    ==&gt; 	at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:93)
    ==&gt; Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
    ==&gt; 	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
    ==&gt; 	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
    ==&gt; 	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
    ==&gt; 	... 5 more
    Error: Command failed to execute!
    
    ==&gt; Failed command:
    /usr/local/Caskroom/android-sdk/3859397,26.0.1/tools/bin/sdkmanager tools platform-tools build-tools;26.0.1
    
    ==&gt; Standard Output of failed command:
    
    
    ==&gt; Standard Error of failed command:
    Exception in thread &quot;main&quot; java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
    	at com.android.repository.api.SchemaModule$SchemaModuleVersion.&lt;init&gt;(SchemaModule.java:156)
    	at com.android.repository.api.SchemaModule.&lt;init&gt;(SchemaModule.java:75)
    	at com.android.sdklib.repository.AndroidSdkHandler.&lt;clinit&gt;(AndroidSdkHandler.java:81)
    	at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:117)


Failed to install android-sdk: &quot;java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema&quot;

Below are two PNG images:

[![enter image description here][1]][1]
[![enter image description here][2]][2]

Visually they are exactly identical - the only difference is that one has the semi-transparent background in some of the pixels (you can download the images to check it).

But when I use those images as an image cursor on JavaFX nodes, I get the following result:

[![enter image description here][4]][4]
[![enter image description here][3]][3]

First cursor (without partially transparent pixels) is still crisp, but the second gets distorted.

After fighting with the problem for a while, I discovered the algorithm that accounts for this difference - blending mode:

* &quot;Expected&quot; way (that you can see in this browser, for example) is to take the sum of values per channel, weighted by alpha values: `(1 - alpha) * background_color + alpha * foreground_color`.

* &quot;JavaFX Cursor&quot; gives the different formula: `(1 - alpha) * background_color + alpha^2 * foreground_color` (note the square).

I discovered the distortion, but I can&#39;t figure out what I did wrong and how I can correct this problem. 

Here&#39;s the complete runnable source code for my testing program:

    import javafx.application.Application;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    import javafx.scene.ImageCursor;
    import javafx.scene.image.Image;

    public class HelloWorld extends Application {

        public static void main(String[] args) {
            launch(args);
        }

        @Override
        public void start(Stage primaryStage) {
            System.out.println(ImageCursor.getBestSize(32, 32));

            primaryStage.setTitle(&quot;Hello World!&quot;);

            StackPane root = new StackPane();
            root.setCursor(new ImageCursor(new Image(&quot;/test-cursor.png&quot;), 0, 0));

            primaryStage.setScene(new Scene(root, 100, 100));
            primaryStage.show();
        }
    }

How can I achieve proper rendering of such semi-transparent cursors?



  [1]: https://i.stack.imgur.com/2C2Lj.png
  [2]: https://i.stack.imgur.com/QqHPR.png
  [3]: https://i.stack.imgur.com/exITg.png
  [4]: https://i.stack.imgur.com/VyHIW.png

Why is javafx mangling my semi-transparent cursors?

I just tried to run my server with Java 9 and got next warning:


    WARNING: An illegal reflective access operation has occurred
    WARNING: Illegal reflective access by io.netty.util.internal.ReflectionUtil (file:/home/azureuser/server-0.28.0-SNAPSHOT.jar) to constructor java.nio.DirectByteBuffer(long,int)
    WARNING: Please consider reporting this to the maintainers of io.netty.util.internal.ReflectionUtil
    WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
    WARNING: All illegal access operations will be denied in a future release

I would like to hide this warning without adding `--illegal-access=deny` to JVM options during start. Something like:

    System.setProperty(&quot;illegal-access&quot;, &quot;deny&quot;);

Is there any way to do that?

All related answers suggesting to use JVM options, I would like to turn off this from code. Is that possible?

To clarify - my question is about turning this warning from the code and not via JVM arguments/flags as stated in similar questions.

How to hide warning &quot;Illegal reflective access&quot; in java 9 without JVM argument?

Is there any difference between google() and maven { url &#39;https://maven.google.com&#39; } in build.gradle file and if there is any, what is it?

    allprojects {
        repositories {
            jcenter()
            maven { url &#39;https://maven.google.com&#39; }
            // OR
            google()
        }
    }


Difference between google() and maven { url &#39;https://maven.google.com&#39; }

I couldn&#39;t figure out why `LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest, this);` &quot;FusedLocationApi&quot; is cross out and point at it saying is deprecated.
[Click here to view Image][1]


    import android.location.Location;
    import android.location.LocationListener;
    import android.support.annotation.NonNull;
    import android.support.annotation.Nullable;
    import android.support.v4.app.FragmentActivity;
    import android.os.Bundle;
    
    import com.google.android.gms.common.ConnectionResult;
    import com.google.android.gms.common.api.GoogleApiClient;
    import com.google.android.gms.location.LocationRequest;
    import com.google.android.gms.location.LocationServices;
    import com.google.android.gms.maps.CameraUpdateFactory;
    import com.google.android.gms.maps.GoogleMap;
    import com.google.android.gms.maps.OnMapReadyCallback;
    import com.google.android.gms.maps.SupportMapFragment;
    import com.google.android.gms.maps.model.LatLng;
    import com.google.android.gms.maps.model.MarkerOptions;
    
    public class MaintainerMapActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener{

    private GoogleMap mMap;
    GoogleApiClient mGoogleApiClient;
    Location mLastLocaton;
    LocationRequest mLocationRequest;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maintainer_map2);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }


    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        // Add a marker in Sydney and move the camera
        LatLng sydney = new LatLng(-34, 151);
        mMap.addMarker(new MarkerOptions().position(sydney).title(&quot;Marker in Sydney&quot;));
        mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
    }

    @Override
    public void onLocationChanged(Location location) {

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(1000);
        mLocationRequest.setFastestInterval(1000);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest, this);
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }
    }


  [1]: https://i.stack.imgur.com/mML1U.jpg

Android LocationServices.FusedLocationApi deprecated

C# 8.0 introduces nullable reference types. Here&#39;s a simple class with a nullable property:
```csharp
public class Foo
{
	public String? Bar { get; set; }
}
```
Is there a way to check a class property uses a nullable reference type via reflection?

Content Type	Original Author	Original Content on Stackoverflow
Question	Dmitri Nesteruk	View Question on Stackoverflow
Solution 1 - Java	Mureinik	View Answer on Stackoverflow
Solution 2 - Java	Andy Turner	View Answer on Stackoverflow

What to use instead of Class.newInstance()?

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Kubernetes sort pods by age

React-Redux: Actions must be plain objects. Use custom middleware for async actions

Attributions