Dynamic Jasper Reports - How to display group value for every new page's first record(Line)?

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I have been using Dynamic Jasper (java). But i couldn't manage to find typical solution for one problem(better look for my report). The thing is that, for the column chosen as a group, it is working perfectly but every time it goes to the new page, the column picked as a group (its value is empty). I want to print the value of column chosen as a group, at the very first line of each new page to minimize confusions like "to whom or to which specific column belong the new page's data".
P.S. without addiny any page break, I simply want to print all the report data continously without displaying each group in each page!

In Jasper Studio, i have seen that we can simply use "Print in first whole band" to have this functionality but I couldn't manage to find an equivalent method for this in Dynamic Jasper.

For more Details with picture: https://community.jaspersoft.com/questions/1173031/dynamic-jasper-reports-how-display-group-value-every-new-pages-first-record