Question

Instead of trying to trying to put my problem into words, here’s some code that demonstrates what I want to do:

Class cls = Double.class
String str = "31.4";
Comparable comparableObj null;

comparableObj = (Comparable) cls.cast(str);

Any ideas? I’ve looked at using reflection but with no success.

Answer 1

I really don’t like what you are trying to do, but here is my modification of your code so that it compiles and runs:

Class [] domains = { Integer.class, Double.class, String.class };
String [] stringValues = { "12", "31.4", "dog" };
Comparable [] comparableObjects = { null, null, null };

for (int i = 0; i < domains.length; i++) {
    Constructor con = domains[i].getConstructor(String.class);
    comparableObjects[i] = (Comparable) con.newInstance(stringValues[i]);
    System.out.println(comparableObjects[i]);
}

Prints:

12
31.4
dog

It might help though if you explain in words what you are trying to achieve, then you might get more help doing it a better way.