Java.lang.Class.getConstructors() Method


Advertisements


Description

The java.lang.Class.getConstructors() method returns an array containing Constructor objects reflecting all the public constructors of the class represented by this Class object. An array of length 0 is returned if the class has no public constructors, or if the class is an array class, or if the class reflects a primitive type or void.

Declaration

Following is the declaration for java.lang.Class.getConstructors() method

public Constructor<?>[] getConstructors() throws SecurityException

Parameters

NA

Return Value

This method returns the array of Constructor objects representing the public constructors of this class.

Exception

SecurityException − If a security manager, s, is present.

Example

The following example shows the usage of java.lang.Class.getConstructors() method.

package com.tutorialspoint;

import java.lang.reflect*;

public class ClassDemo {

   public static void main(String[] args) {

      try {
         Class cls = Class.forName("java.awt.Panel");
         System.out.println("Panel Constructors =");

         /* returns the array of Constructor objects representing the public 
            constructors of this class */
         Constructor c[] = cls.getConstructors();
         for(int i = 0; i < c.length; i++) {
            System.out.println(c[i]);
         }
      } catch (Exception e) {
         System.out.println("Exception: " + e);
      }
   }
} 

Let us compile and run the above program, this will produce the following result −

Panel Constructors =
public java.awt.Panel()
public java.awt.Panel(java.awt.LayoutManager)

java_lang_class.htm

Advertisements