使用反射检查java中的字段是否为final

Question

I'm writing a class, which at some point has to have all its Field s assigned from another item of this class.

I did it through reflection:

for (Field f:pg.getClass().getDeclaredFields()) {
    f.set(this, f.get(pg));
}

The problem is, that this class contains a Field , which is final . I could skip it by name, but to me that seems not elegant at all.

What's the best way to check if a Field is final in java using reflection?

Answer 1

The best and only one way is: Modifier.isFinal(f.getModifiers())

Reference:

• Field.getModifiers
• Modifier.isFinal

Answer 2

You can use getModifiers() method on the Field variable:

if ((f.getModifiers() & Modifier.FINAL) == Modifier.FINAL)
{
    //this is final field
}