Is there a way to create an array from a Class
object dynamically using something like
MyClass[].newInstance();
I'm aware that it throws an InstantiationException
, but is there a way for me to instantiate an array indicating its type with a Class
object?
Since java.lang.reflect.Array.newInstance() is not available in J2ME, I think you'd need a loop to do this for each object:
private Object[] createArray(String fullClassName, int length) {
Object[] objects = new Object[length];
try {
Class c = Class.forName(fullClassName);
for (int i = 0; i < objects.length; i++) {
objects[i] = c.newInstance();
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
}
return objects;
}
and remember to fully-qualify the name (if you're using stringified class names):
Object[] array = createArray("mypackage.Widget", 10);
with
package mypackage;
public class Widget {
public int foo() {
return 5;
}
}
Note that the getConstructor() method is not available in the BlackBerry Class, so you're limited to creating objects with no-argument constructors.