How can I get only protected and public constructors of a java class?

Question

I can get all constructors(private, protected and public) using Java Reflection:

public Constructor<?>[] getDeclaredConstructors();

How can I get only protected and public constructors of a java class ?

Answer 1

getConstructors() returns public constructors. To get protected constructors you have to use getDeclaredConstructors() and then iterate over the array and check whether constructor is protected.

Here is the code sample:

for (Constructor c : clazz.getDeclaredConstructors()) {
    if (Modifier.isProtected(c.getModifiers())) {
       // this constructor is protected
    }
}

Answer 2

use java.lang.reflect.Modifier; for checking the modifiers(ie: public, protected, public final, etc ):

    Class<?> c = Class.forName("ClassName");
    Constructor[] allConstructors = c.getDeclaredConstructors();
    for (Constructor m : allConstructors) {
        String modifier = Modifier.toString(m.getModifiers());
        System.out.println(modifier);
     }