i have a project, and i am build this project with jdk 6,7,8 and my target is 1.6 when i build jdk 8 i get this error: Undefined reference: java.util.concurrent.ConcurrentHashMap.KeySetView java.util.concurrent.ConcurrentHashMap.keySet() since i have this code in that line: how can avoid error, i made some se…
Tag: java
Mockito; verify method was called with list, ignore order of elements in list
I have a class (ClassA) that get the files in a directory. It scans the given directory for files matching a regex. For each matching file, it adds a File Object to a list. Once the directory is processed, it passes the List of Files to another Class (ClassB) for processing I am writing unit tests for ClassA,…
how to print out the user number input with the result instead of showing only result?
I am trying to print out the numbers that user input but i got no idea (example: when user input 2 and 3, it should be show 2+3=5 instead of 5 alone ) also how to find the average of the number too. here is my code: } as you can see at (star)(star)…..(star)(star) it shouldn’t be /2 because it
How to map Hibernate entity fields using camelCase to snake_case (underscore) database identifiers
I have database fields in underscore. I have entity fields in camelcase. I can’t change either of those. Is there something, maybe a class level annotation I can use to default entity column name annotations to the camelcase equivalent? for example, I have an entity like this: I dream of this: Answer Yo…
Can a part of XML be marshalled using JAXB (or JAXB + StAX)?
I have an XML structure which is very huge. I want to update the parts of this XML, by unmarshalling one element and then applying business logic. I am able to unmarshal a child element into a POJO. I want to make changes to this POJO in Java and then update it back to the XML at the same location.
Android – programmatically change the state of a switch without triggering OnCheckChanged listener
I’m looking for a method of programmatically changing the state of an Android Switch widget using switch.setChecked(true); without triggering OnCheckedChangedlistener. My first thought was to swap it out for an OnClickListener but as this only registers clicks and you are able to not only click but also…
Connecting to MySQL database using Java in command prompt
Since I don’t have netbeans right now, I am trying to connect to MySQL database from my Java code through command prompt. But it it is not taking the mysql-coonectivity.jar file. Does anyone know any way to run my program??? Please help. Answer Try executing the program as it is windows OS In case you d…
How to sort dates of type string in java
I am building a android project where am storing some details which includes date as string,but now I need to sort the list view by date.I am bit confused on how to do it.I am done with everything but need to sort the list by date. Here is the overview of how am storing data. I have an arraylist of
openFileOutput() method vs FileOutputStream() constructor
Why in Android one should use openFileOutput() method instead of FileOutputStream() constructor? Would the mode type as a second param of openFileOutput() be the only “respectful” reason for all the cases? Answer Would the mode type as a second param of openFileOutput() be the only “respectf…
Content-Type not allowed: fileUpload in Struts 2
I am new to Struts 2 and trying to do use fileUpload interceptor. I am attaching all my code layers Action Class (FileUploadAction): error.jsp: Success.jsp: fileUpload.jsp: I am not understanding why I am getting this error Although my uploading file format is .jpg. Answer You are getting this error probably …