[SOLVED] Accessing private constructor

[piyu.sha]

Hi,

How can I access private constructor in outside the class ?

is any possible?

Thanks in advance

[kzvi.kzvi.1]

Here is a sample code by which you can hack and call the private constructor of a class using reflection.

code:

public class HackMeIfYouCan {
private HackMeIfYouCan(){
System.out.println("I m hacked");
}
}

code:

public class Test {

public static void main(String[] args) throws Exception {

Constructor c[] = HackMeIfYouCan.class.getDeclaredConstructors();

c[0].setAccessible(true);

c[0].newInstance(null);

}

}

Here is the output of this program

I m hacked

Here are few more similar hacking tricks based on same technique of setAccessible() method call.

Examples of
Object Hacking Java demonstrates how a Singleton can be accessed, how a private field can be accessed using same technique.
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[piyu.sha]

Thanks a lot, this is perfect, I cant believe this.