java

[Solved] How can use JAVA 8 filter for following code [closed]

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Following snippet might be a point to start with. URL url = new URL(“http://example.com/acct/StatsClientListService” + “?clientType=AllClient&something=interesting”); Stream.of(url.getQuery().split(“&”)) .collect(Collectors.toMap( s -> s.replaceFirst(“^(.*)=.*”, “$1”), s -> s.replaceFirst(“^.*=(.*)”, “$1”))) .forEach((k, v) -> System.out.printf(“param: %s value: %s%n”, k, v) ); output param: clientType value: AllClient param: something value: interesting edit If the URL string contain only the path and … Read more

[Solved] azure.datalake.store.AdlFileSystem not found in Spark

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Presently HDInsight-Spark Clusters are not available with Azure Data Lake Storage. Once we have the support it would work seamlessly. In the mean time you can try and use ADL Analytics to the same job on ADLS using U-SQL queries. For reference please visit the link: https://azure.microsoft.com/en-us/documentation/articles/data-lake-analytics-get-started-portal/ We are working for the support and it … Read more

[Solved] Android Studio not installing App on device

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The reason why you re getting the error is because you have no activity to launch the app , so in your manifest file , you should specify the launcher activity This is the code <activity android:name=”.activities.ControlActivity” activity android:label=”@string/title_activity_control” android:theme=”@style/AppTheme.NoActionBar”></activity> <activity android:name=”.activities.ConnectActivity”> // here specify the the <intent-filter> <action android:name=”android.intent.action.MAIN” /> <category android:name=”android.intent.category.LAUNCHER” /> </intent-filter> … Read more

[Solved] What is this technique and why it is used for and how it works?

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I found this searching SO: Why should we declare an interface inside a class? Thus, when dealing with some hierarchy, you can describe a “nested” interface, which will be implemented by the wrapping class’s subclasses. In the JDK, the most significant example would be Map.Entry inner interface, defined within Map interface and implemented by various … Read more

[Solved] Java Lambda groupby reducing with transformation [closed]

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I think the problem is the new ObjStr2() in your second collector. You’re using the same starting element for all groups. You’re concatenating everything to the same object, and because this is mutable, everything is appended to that same object. Instead, make your doReduce return a new object: static ObjStr2 doReduce(ObjStr2 a, ObjStr2 b) { … Read more

[Solved] Inherit model with different JSON property names

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One way is to use PropertyNamingStrategy http://wiki.fasterxml.com/PropertyNamingStrategy Here is nice simple demo how you can use it Link to How to Use PropertyNamingStrategy in Jackson The other is use MixInAnnotations http://wiki.fasterxml.com/JacksonMixInAnnotations with MixInAnnotations you can create just one Person class and Mixin for any other alternative property name setup. public static void main(String[] args) throws … Read more