反射不在类中打印构造函数名称

Question

我试图使用反射打印构造函数名称但是它跳过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());
        }
    }
}

我试图调试应用程序,但没有使用它不进入for循环本身.

谁能帮我这个？

Answer 1

从getConstructors()[强调我的] 文档:

返回一个数组,其中包含Constructor反映此对象所表示的类的所有公共构造函数的Class对象.

你的班级没有任何公共建设者.这两个构造函数是包私有的:

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