How to create new variable in java dynamically

Question

Is it possible to create new variables in java dynamically.

class A {
methodA(String variableName) {

      }
}

So if new method is called

Answer 1

Using a HashMap could be a solution. For example, if we have the following class:

class Staff {
    private HashMap mylist = new HashMap() ;

    void setNewVar(String s, Object o) {
        mylist .put(s, o);
    }

    HashMap getVar() {
        return mylist;
    }
}

I can use it as:

staff.setNewVar("NumVars",11);
staff.setNewVar("NumBatches",300);
...

and then:

staff.getVar()

wherever you need. I use it to convert some variables (the number can change) to JSON, successfully.