Anders Anders - 6 months ago 7
Java Question

Retrieve only static fields declared in Java class

I have the following class:

public class Test {
public static int a = 0;
public int b = 1;
}


Is it possible to use reflection to get a list of the static fields only? I'm aware I can get an array of all the fields with
Test.class.getDeclaredFields()
. But it seems there's no way to determine if a
Field
instance represents a static field or not.

Answer

You can do it like this:

Field[] declaredFields = String.class.getDeclaredFields();
List<Field> staticFields = new ArrayList<Field>();
for (Field field : declaredFields) {
    if (java.lang.reflect.Modifier.isStatic(field.getModifiers())) {
        staticFields.add(field);
    }
}
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