Reflect中的Constructor

package com.example.test;import java.lang.reflect.Constructor;public class myCtor {private String s1, s2;public myCtor(String s1, String s2){this.s1 = s1;this.s2 = s2;}public myCtor(String ...strings) {if (strings.length == 1){s1 = s2 = strings[0];}else if (strings.length == 2){this.s1 = strings[0];this.s2 = strings[1];}}public static void main(String[] args){Constructor<?>[] dcs = myCtor.class.getDeclaredConstructors();for(int i = 0; i < dcs.length; i++){Constructor<?>  c = dcs[i];Class<?>[] paramtypes = c.getParameterTypes();for(int j = 0; j < paramtypes.length; j++){System.out.println("param " + j + ":" + paramtypes[j]);}}System.out.println(String.class.isInstance(22));System.out.println(String.class.isInstance("22"));}}

Output:

param 0:class java.lang.Stringparam 1:class java.lang.Stringparam 0:class [Ljava.lang.String;falsetrue