🚀 go-pugleaf

I have an application written in Delphi that I am porting to 
Java. In the delphi program I read in some real values in 
BigEndian format. I then convert these to Windows real format 
by using a variant record, which Java doesn't have, to swap
bytes so that the proper format can be obtained. 

How do I accomplish the same task in Java? Below is the code
that swaps the proper bytes to get the value in the proper 
format.

type
  realvar = record  // Note use of variant record which Java does not have.
              case RealNum:byte of
                1:(bytename: byte4);
                2:(realname: single);
            end;
  WordVar = record
              case WordNum:byte of
                1:(ByteName: Byte2);
                2:(WordName: Word);
            end;

// procedures
function TSDIAppForm.Convert(ByteArray:single):single;
var
  temp : realvar;
begin
  temp.realname := ByteArray;
  swap(temp.bytename[1], temp.bytename[4]);
  swap(temp.bytename[2], temp.bytename[3]);
 try
  begin
    if temp.realname < 0 then
      Convert := 0
    else
      Convert := temp.realname;
  end
 except
   on EInvalidOp do
     Convert := 0;
 end;
end; { of Convert }

function TSDIAppForm.ConvertWord(Value : Word):Word;
var
  Temp : Wordvar;
begin
  Temp.wordName := Value;
  Swap(temp.ByteName[1], Temp.ByteName[2]);
  ConvertWord := Temp.WordName;
end; { of ConvertWord }