Java|构造函数能不能使用invoke()方法？

Question

Java中构造函数能不能使用invoke()方法？

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;

class Q{
    private String name; private boolean gender; private int age; private double score;
    public Q(){
        this.name = "none"; this.gender = false; this.age = 0; this.score = 0;
    }
    public Q(String name, boolean gender, int age, double score){
        this.name = name; this.gender = gender; this.age = age; this.score = score;
    }
    public void set(String name, boolean gender, int age, double score){
        this.name = name; this.gender = gender; this.age = age; this.score = score;
    }
    public String toString(){
        return "name:"+this.name+", gender:"+this.gender+", age:"+this.age+", score:"+this.score;
    }
}
public class invokeDemo{
    public static void main(String[] args){
        Class<?> c = null;
        try{
            c = Class.forName("Q");
        } catch(Exception e){
            e.printStackTrace();
        }
        try{
            Method m3 = c.getMethod("Q");
            Method m4 = c.getMethod("Q", String.class, boolean.class, int.class, double.class);
            System.out.println(m3.invoke(c.newInstance()));
            System.out.println(m4.invoke(c.newInstance(), "大大", true, 19, 100.9999));
        } catch(Exception e){
            e.printStackTrace();
        }
    }
}

运行结果如下：
java.lang.NoSuchMethodException: Q.Q()
at java.base/java.lang.Class.getMethod(Class.java:2227)
at invokeDemo.main(invokeDemo.java:45)
嗯嗯...NoSuchMethodException发生在Method m3 = c.getMethod("Q");这一行。

这样看来构造方法不能使用invoke()方法了？或者说我使用的方法不正确？
欢迎讨论、解答！

Answer 1

Method是Method，Constructor是Constructor
你想要的应该是

        Constructor<Q> constructor = Q.class.getConstructor(String.class, boolean.class, int.class, double.class);
        Q q = constructor.newInstance("1", true, 0, 0.0);
        System.out.println(q);