Create Entity Class
Create entities package and create new class named Student as below:
package entities;
public class Student {
private String id;
private String name;
private int age;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Student() {
}
public Student(String id) {
this.id = id;
}
public Student(String id, String name) {
this.id = id;
this.name = name;
}
public Student(String id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
}
Run Application
package reflection;
import java.lang.reflect.Constructor;
import java.lang.reflect.Parameter;
import entities.Student;
public class Main {
private static void displayConstructors(Student student) {
Class studentClass = student.getClass();
for (Constructor constructor : studentClass.getConstructors()) {
System.out.println(constructor.getName());
System.out.println("\tParameter Count: " + constructor.getParameterCount());
if (constructor.getParameterCount() > 0) {
for (Parameter parameter : constructor.getParameters()) {
System.out.println("\t" + parameter.getName() + ": " + parameter.getType());
}
}
}
}
public static void main(String[] args) {
Student student = new Student();
displayConstructors(student);
}
}
Output
entities.Student
Parameter Count: 0
entities.Student
Parameter Count: 1
arg0: class java.lang.String
entities.Student
Parameter Count: 2
arg0: class java.lang.String
arg1: class java.lang.String
entities.Student
Parameter Count: 3
arg0: class java.lang.String
arg1: class java.lang.String
arg2: int