What is the data structure to add different kinds of data?

Question

what is the data structure that allows you to add different kinds of data (String, Float, int...) together? For example:

table tab = new table();
tab.add("abcdefgh");
int i=0;
tab.add(i);
float f;
tab.add(f);
...

Answer 1

You can use either collections (lists or sets) or maps. Both are generic, so in your case you should use Object as a generic parameter:

List<Object> list = new ArrayList<>();
list.add(1);
list.add("hello");
list.add(new Date());

etc.

However it seems that you are on a wrong way. This is typically very bad practice to use untyped data. Java is a strongly typed language and java programmers tend to use this advantage.

You can also use Table from guava.

I'd recommend you to ask more specific question. I believe that you have a task and you think that storing data of different types in one place is a good idea. It is not.

I hope this helps.

Answer 2

If I have understand your question and you need to store in a list of related values, create an object

class MyObject{
    private String sentence;
    private Float score;
    private String kind;
    // getters and setters
}

where you can save the related values, and then add your objects to a Collection.

For example:

List<MyObject> list = new ArrayList<MyObject>();

MyObject myObject = new MyObject();
myObject.setSentence("sentence");
// initialize object fields

list.add(myObject);