Create static array using Class.forName

Question

In Android there is a undeclared (hidden) class named "android.graphics.FontFamily" and I want to create static array of it. Any thing like this:

Class<?> clazz = Class.forName("android.graphics.FontFamily"); // Ok.
Class<?> clazz_array = Class.forName("android.graphics.FontFamily[]"); // Method threw 'java.lang.ClassNotFoundException' exception.

To build this hypothetical code:

FontFamily[] families = {fontFamily};

How can I do it?

Thankyou.

What does "undeclared (hidden) class" means? It means `private`, `nested static private` or `inner private`? — Giorgio Antonioli, Jun 05 '16 at 08:57
@pskink If I understood well the array isn't declared in that class, he simply wants to create an array of that private class — Giorgio Antonioli, Jun 05 '16 at 08:59
@Fondesa, yes, `he simply wants to create an array of that hidden class ` — pskink, Jun 05 '16 at 09:00

score 3 · Accepted Answer · edited Jun 05 '16 at 10:18

3

You should be able to create an array reflectively then get its class. Example:

Class <?> clazz = Class.forName("android.graphics.FontFamily");
Object fontFamily = clazz.newInstance();
Object families = Array.newInstance(clazz, 1);
Array.set(families, 0, fontFamily);

edited Jun 05 '16 at 10:18

mh taqia

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answered Jun 05 '16 at 08:59

bcsb1001

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Ok, clazzArray is class, and how can I instantiante an instance of it which has 1 item (like FontFamily[] families = {fontFamily})? – mh taqia Jun 05 '16 at 09:14
1

@mhtaqia see `java.lang.reflect.Array` documentation – pskink Jun 05 '16 at 09:24

score 1 · Answer 2 · answered Jun 05 '16 at 09:04

You should specify the fully-qualified name as specified in the Class documentation. So in your case it would be:

Class<?> clazzArray = Class.forName("[Landroid.graphics.FontFamily;");

The [ indicates an array, and then the L prefix and semi-colon suffix are to indicate that the part in the middle is a class name.

Create static array using Class.forName

2 Answers2