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Java reflection get private constructor

The java.lang.Class provides the methods to examine the runtime properties of the object including its members and type information. For every type of object, the JVM instantiates an immutable instance of java.lang.Class. Using reflection, we can get the metadata of a class at run time.

The getDeclaredConstructor() is used to get private constructor in java.


package com.codesjava;
public class TestClass {
	private String message;
	private TestClass(String message){
		this.message = message;
	public void display(){

package com.codesjava;
import java.lang.reflect.Constructor;
import java.util.Arrays;
public class ReflectionTest {
	public static void main(String args[]){
		try {
			Class c=Class.forName("com.codesjava.TestClass");  
			Constructor<?> constructor = c.getDeclaredConstructor(String.class);
		} catch (Exception e) {


[class java.lang.String]

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