I enrolled my apps in ‘Google Play Signing’. Now I see in the console the following message: I thought that it is due the fact that all my apps were initially signed with the same release key (that I uploaded to Google Play Console during the enrolling procedure to Google Play Signing). So I thoug…
Tag: java
how to handle subfields with JPOS library in java?
i have to build an iso 8583 message and for that i used the jpos library which is, according to my researches, the best libray to handle iso 8583 communications. I succeeded to build and send iso 8583 messages with fields in range 0-128 as you can see in this code : and the response class but i have a
Java exception handling: JSONObject cannot convert JSONArray
After executeQuery, I’ve got some set of results in XML format. While checking xmlJSONObj.getJSONObject(“Root”).has(“AmountDtl”), I get an exception “JSONObject[“Root”] is not a JSONObject”. How to handle this exception? Answer In your case. You have If yo…
Mapping between DB2 XML CLOB data type and DB2 JDBC types are keep changing as upgrading to different JDBC versions
We were using com.ibm.db2.jcc.db2jcc4 v10.1 and recently we have upgraded it with the V11.1.4 FP5 driver for the z/OS Db2 systems. When we were using com.ibm.db2.jcc.db2jcc4 v10.1 the equivalent JDBC java class for DB2 XML CLOB was com.ibm.db2.jcc.am.ne and now after upgrading it with V11.1.4 FP5 driver now, …
Run task asynchronously: ManagedExcecutorService vs Microprofile fault tolerance @Asynchronous
I want to run an asynchronous task in a JavaEE openliberty environment. Ideally the task has to run at startup, but I don’t want that it blocks the startup of the WAR module itself. Also, I don’t want that on failure it prevents the whole application from starting up. So I guess that the solution …
Expose `final static Set` of a class
I have a class that has: public static final Set<String> IDS = new HashSet<>();, whose values are initiated in a static block after running some query (Therefore I can’t declare it as unmodifiableSet). Now that other classes need to use IDS but apparently I don’t want to let them get d…
How can I include shaded POM of a library/sdk in my application’s pom.xml?
I have a library/sdk in which I created a shaded pom java-sdk-1.0.0-SNAPSHOT-shaded.pom using maven shade plugin . which contains all jars and classes which are used as dependencies . Now I want to integrate this in my sample application so that I can use it as an external library. I have copied it to my appl…
Sort String of Characters Using Hashed Array and Java 8 Streams
I stumble upon this cool sorting algorithm with O(n) time complexity on GeeksforGeeks – Sort string of characters and I was trying to refactor the code to use Java Streams on the nested for loops instead and collect the result in a string variable but I can’t seem to wrap my head around it. Here&#…
mvn compile OK, but mvn compile exec:java -D exec.mainClass=”mygroup.TestExpression” fails
I’ve refered to this post: Resource specification not allowed here for source level below 1.7 I used the solution, but didn’t solve problem. Well I’m not using eclipse but jdk 1.8 + vscode on win10, using maven to generate a new project: mvn archetype:generate add these lines in my pom.xml i…
Converting List to TreeMap java lambda
I’m trying to convert a List<String> to a TreeMap<Long, CustomClass> The key is the same as the list items but just parsed to Long, the value is just a call to new CustomClass(). How can I achieve this using lambda functions? the above code errors out, with the following error, Answer For ex…