J250511/01-JavaSE阶段代码/J20250805/demo04/ClassTest02.java

package J20250805.demo04;

import java.lang.reflect.Constructor;

/**
 * @author WanJl
 * @version 1.0
 * @title ClassTest02
 * @description
 * @create 2025/8/5
 */
public class ClassTest02 {
    public static void main(String[] args) throws NoSuchMethodException {
        Class<Student> studentClass = Student.class;
        //通过Class类获取某个类的所有【公共的】构造方法组成的数组
        Constructor<?>[] constructors = studentClass.getConstructors();
        System.out.println(constructors.length);
        //通过Class类获取某个类的所有的构造方法组成的数组
        Constructor<?>[] declaredConstructors = studentClass.getDeclaredConstructors();
        System.out.println(declaredConstructors.length);
        //通过Class类获取某个公共构造方法的对象
        Constructor<Student> constructor = studentClass.getConstructor(String.class, String.class, Integer.class, String.class);
        System.out.println(constructor);
        //通过Class类获取某个构造方法的对象
        Constructor<Student> declaredConstructor = studentClass.getDeclaredConstructor(String.class);
        System.out.println(declaredConstructor);
    }
}