反射不打印类中的构造函数名称

Question

我正在尝试使用反射打印构造函数名称，但是它跳过了用于打印循环名称的循环。

package reflection.com;
import java.lang.*;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
abstract interface FirstInterface {
    void showFirstInterface();
}
abstract interface SecondInterface {
    void showSecondInterface();
}
abstract interface ThirdInterface {
    void showThirdinterface();
}
class SuperClass implements FirstInterface {
    int x, y, z;
    SuperClass() {
        System.out.println("Super Class Constructor...");
    }
    public void showFirstInterface() {
        System.out.println("In class Super Class....");
    }
}
public class SubClass extends SuperClass implements SecondInterface, ThirdInterface {
    int a, b, c;
    SubClass() {
    }
    SubClass(int a, int b, int c) {
    }
    public void showSecondInterface() {
        System.out.println("In class Sub Class implementing Second Interface...");
    }
    public void showThirdinterface() {
        System.out.println("In class Sub Class implementing Third Interface...");
    }
}
class ReflectionTest {
    public static void main(String[] args) {
        Class class1 = SubClass.class;
        int modifier = class1.getModifiers();
        Class superClass = class1.getSuperclass();
        Class[] interfaces = class1.getInterfaces();
        Constructor[] constructor = class1.getConstructors();
        Method[] method = class1.getMethods();
        Field[] field = class1.getFields();
        System.out.println("Fully Qualified Class Name..." + class1.getName());
        System.out.println("Class Name..." + class1.getSimpleName());
        System.out.println("Class Modifier...." + Modifier.isPublic(modifier));
        System.out.println("Class Super Class....." + superClass.getName());
        System.out.println("Following are the interfaces.....");
        for (int i = 0; i < interfaces.length; i++) {
            System.out.println(interfaces[i].getName());
        }
        System.out.println("Following are the Constructor.....");
        for (int i = 0; i < constructor.length; i++) {
            System.out.println(constructor[i].getName());
        }
        System.out.println("Following are the Fields.....");
        for (int i = 0; i < field.length; i++) {
            System.out.println(field[i].getName());
        }
        System.out.println("Following are the Methods.....");
        for (int i = 0; i < method.length; i++) {
            System.out.println(method[i].getName());
        }
        for (Method method1 : method) {
            System.out.println(method1.getName());
        }
    }
}

我试着调试这个应用程序，但是没有用，它没有进入for循环。

有谁能帮我一下吗?

Answer 1

来自getConstructors()的文档:

返回一个包含Constructor对象的数组，该数组反映了这个Class对象所表示的类的所有公共构造函数。

你的类没有任何公共构造函数。这两个构造函数是package-private:

public class SubClass ... {
    SubClass() {}
    SubClass(int a, int b, int c) {}