Java tutorial
import java.lang.reflect.Modifier; public class Main { public static void main(String[] args) throws Exception { getClassModifier(String.class); getClassModifier(TestA.class); getClassModifier(TestB.class); } private static void getClassModifier(Class clazz) { int modifier = clazz.getModifiers(); if (Modifier.isPrivate(modifier)) { System.out.println(clazz.getName() + " class modifier is private"); } } protected static final class TestA { } private abstract class TestB { } }