Whats the best way to expose this in memory database? (ArrayList)

Question

Hello everyone.
I was looking for advice on how I should implement this...currently I have the following ArrayList that stores ClassEntity objects. I'm going to write 2 classes that need to access this ClassEntity Object arrayList because they are goign to use these objects to spit out 2 different files.
I didn't want to make the database public and static though.
Here's a snippet of my current class that populates and creates the arrayList data structure:
public class RODMFileParser
     //used to keep file information
     ClassEntity classEntity = null;
     //used to store ClassEntity objects
     List<ClassEntity> classEntityList = new ArrayList<ClassEntity>();
     //used to store the conversion table RODM->ENGLISH/ENGLISH->RODM
     ConversionTableParser convTableParser = new ConversionTableParser();
        else if(line.contains("Field Value "))
                    //now we can create a new Entity Class object! tricky! huh
                    classEntityList.add(new ClassEntity(idClassName,  idFieldName,
                                                                   englishClassName, englishFieldName, fieldType));
Iterator listIter = classEntityList.iterator();
          while(listIter.hasNext())
               ClassEntity tempObj = (ClassEntity) listIter.next();
               System.out.println(tempObj);
          }So now classEntityList has all the objects I need to create these 2 seperate files but these 2 files are dramtically different. What would be the best way at exposing this classEntityList ArrayList so my 2 other classes can access it?
Thanks!

Answer 1

well if I made it non-static, wouldn't I have to create a new object of that class in each class I want to use it in?
for example, that class that populates the database must parse a file to create the database.
RODMFileParser file = new RODMFileParser();
          file.parseFile("QAGENT");So inside each class I would have to do this wouldn't I? if I made it public static, wouldn't I only have to read to the disk once?
Putting it to a worst case say, 100 classes need this database, that means I would have to make 100 accesses to the disk woulnd't it?
And if it was public static, it would jsut return a copy of the database that was only read from the disk once or am I misunderstanding how it works?