Question: java Given string userName on one line and string lastName on a second line, append an underscore to userName. Then, append lastName to userName. Ex:

java

Given string userName on one line and string lastName on a second line, append an underscore to userName. Then, append lastName to userName. Ex: If the input is: Ron Hill then the output is: Ron_HilL 345678910publicclassConcatenateString{publicstaticvoidmain(StringDargs){Scannerscnr=newScanner(System.in)StringuserName;StringlastName;userName=scnr.nextline();LastName=scnr.nextline()

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