Question

Given a simple Java class like this:

class MyData {
    public int a;
    public int b;
    public int c;
    public int d;
}

And a MyData data[] that I need to pass into native code, is it better to do something like this:

for (MyData item : data) {
    myNativeMethod(item.a,item.b,item.c,item.d);
}

Or is it better to myNativeMethod(data) and use GetArrayLength, GetObjectArrayElement and GetIntField?

In this case “better” is intentionally vague. Performance and maintainability are both concerns.

Answer 1

In your particular case it’s simpler to pass individual values as parameters. However, it will clutter your Java code once the object gets more complex.

Said that, I don’t see huge difference to prefer one way over another.