REFLECTION

2015 Reflection Question

public class User {

private final String username;

private final String password;

public User() {

this.username= "MTIT";

this.password = "password";

}

@Override

public String toString() {

return this.username + "/" + this.password;

}

public static void main(String[] args) {

try

{

User user=new User();

Class<?> clazz=user.getClass();

User user2=new User();

Class<?> clazz2=user2.getClass();

Field privateField=clazz.getDeclaredField("username");

privateField.setAccessible(true);

Field privateField2=clazz.getDeclaredField("password");

privateField2.setAccessible(true);

System.out.println("Username/Password = "+user.toString());

Field modifiedField=clazz.getDeclaredField("username");

modifiedField.setAccessible(true);

modifiedField.set(user,"darsh");

Field modifiedField2=clazz.getDeclaredField("password");

modifiedField2.setAccessible(true);

modifiedField2.set(user,"darsh");

System.out.println("Modified Username/Password = "+user.toString());

}

catch(NoSuchFieldException e)

{

e.printStackTrace();

}

catch(IllegalAccessException e)

{

e.printStackTrace();

}

}

}