java.lang.NoSuchMethodException

反射類，獲取類的構造函數

public class Demo01Person {
    public String getName() {
        return name;
    }

    public Demo01Person(String name, Integer age) {
        this.name = name;
        this.age = age;
    }

    public Demo01Person() {
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Integer getAge1() {
        return age1;
    }

    public void setAge1(Integer age1) {
        this.age1 = age1;
    }

    public Demo01Person(String name, Integer age, Integer age1) {
        this.name = name;
        this.age = age;
        this.age1 = age1;
    }

    private  String name;
    private  Integer age;
    public   Integer age1;

    protected  String d;
}

　　

public static void main(String[] args) throws Exception {
        Class personClass  = Demo01Person.class;
        Constructor constructor = personClass.getConstructor(String.class, int.class);
        System.out.println(constructor);
    }

　　

 

Exception in thread "main" java.lang.NoSuchMethodException: Demo.DemoReflect.Demo01Person.<init>(java.lang.String, int)
at java.base/java.lang.Class.getConstructor0(Class.java:3322)
at java.base/java.lang.Class.getConstructor(Class.java:2108)