Welcome to the Java Programming Forums
The professional, friendly Java community. 21,500 members and growing!
The Java Programming Forums are a community of Java programmers from all around the World. Our members have a wide range of skills and they all have one thing in common: A passion to learn and code Java. We invite beginner Java programmers right through to Java professionals to post here and share your knowledge. Become a part of the community, help others, expand your knowledge of Java and enjoy talking with like minded people. Registration is quick and best of all free. We look forward to meeting you.
>> REGISTER NOW TO START POSTING
Members have full access to the forums. Advertisements are removed for registered users.
LinkBack URL
About LinkBacks
Change HashMap Type
I was wondering is it posible to change the Type of a HashMap?
Becasue lets say I have used an Api (Apache POI) to create a HashMap.
Map<Cell, XSSFCell> mapFile1 = new LinkedHashMap<Cell, XSSFCell>();
But later on in the program I work with a lot of strings, and I would like to be able to look a string up in the HashMap.
Is there a way to make the same HashMap:
Map<String, String> mapFile1 = new LinkedHashMap<String, String>();
Related threads:
Re: Change HashMap Type
Why do you need to use the same variable name? When you define a variable, the compiler saves its type for use later in the program. To have two variables with the same name but different types, you would need to define them in different scopes.
If you don't understand my answer, don't ignore it, ask a question.
Re: Change HashMap Type
So it would be possibel to covert the data from:
Map<Cell, XSSFCell> mapFile1 = new LinkedHashMap<Cell, XSSFCell>();
to
Map<String, String> mapFile1String = new LinkedHashMap<String, String>();
Becasue I find it very hard to work with this HashMap: Map<Cell, XSSFCell> mapFile1 = new LinkedHashMap<Cell, XSSFCell>();
I can't even get the keys out there properly.
Like .containsKey() won't even work on that HashMap.
Re: Change HashMap Type
Do the Cell class and the XSSFCell class have methods that will convert their contents to a useful String?
If so loop through the keys of the first Map, get the value for each key, convert the key and value to String and put them into the second Map.
If you don't understand my answer, don't ignore it, ask a question.
Reply With Quote