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Class getConstructors() method in Java with Examples
  • Last Updated : 26 Apr, 2021

The getConstructors() method of java.lang.Class class is used to get the constructors of this class, which are the constructors that are public. The method returns the constructors of this class in the form of array of Constructor objects. 
Syntax: 
 

public Constructor[] getConstructors()

Parameter: This method does not accept any parameter.
Return Value: This method returns the constructors of this class in the form of array of Constructor objects. 
Exception This method throws SecurityException if a security manager is present and the security conditions are not met.
Below programs demonstrate the getConstructors() method.
Example 1:
 

Java




// Java program to demonstrate getConstructors() method
 
import java.util.*;
 
public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
 
        // returns the Class object for this class
        Class myClass = Class.forName("Test");
 
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
 
        // Get the constructors of myClass
        // using getConstructors() method
        System.out.println(
            "Constructors of myClass: "
            + Arrays.toString(
                  myClass.getConstructors()));
    }
}
Output: 
Class represented by myClass: class Test
Constructors of myClass: [public Test()]

 

Example 2:
 

Java




// Java program to demonstrate getConstructors() method
 
import java.util.*;
 
class Main {
 
    public Object obj;
 
    private Main()
    {
 
        class Arr {
        };
 
        obj = new Arr();
    }
 
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for this class
        Class myClass = Class.forName("Main");
 
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
 
        // Get the constructors of myClass
        // using getConstructors() method
        System.out.println(
            "Constructors of myClass: "
            + Arrays.toString(
                  myClass.getConstructors()));
    }
}
Output: 
Class represented by myClass: class Main
Constructors of myClass: []

 

Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getConstructors–
 

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