Thread: Accessing a method of one class in another class

Hi,
I am trying to access the method of one class in another class through an object of the former class.
Constraint is that i have the class name of the first class in a string variable.
i tried the following code
but i am unable to access the method..

package experiment;
 
public class t1 {
	public void preent(){
		System.out.print("test works");
	}
 
}

--------------------------------------------------

package experiment;
import java.lang.reflect.*;
 
 
 
 
public class maiin {
	static Object createObject(String className) {
	      Object object = null;
	      try {
	          Class classDefinition = Class.forName(className);
	          object = classDefinition.newInstance();
	      } catch (InstantiationException e) {
	          System.out.println(e);
	      } catch (IllegalAccessException e) {
	          System.out.println(e);
	      } catch (ClassNotFoundException e) {
	          System.out.println(e);
	      }
	      return object;
	   }
 
 
 
	public static void main(String[]args) throws ClassNotFoundException{
		maiin M = new maiin();
		Object O = M.createObject("t1");
		O.preent();
 
 
}}

help me

Thanks in advance

preent isn't a method of type Object, you must type cast because the object has been polymorphed.

		maiin M = new maiin();
		Object O = M.createObject("t1");
		if (O instanceof t1)
		{
			// just making sure it's a safe cast
			((t1) O).preent();
		}

thanks helloworld922...that does work

but i am encountered with this exception always...which is not allowing me from creating the object

Severity and Description Path Resource Location Creation Time Id
Class is a raw type. References to generic type Class<T> should be parameterized experiment/src/experiment maiin.java line 11 1269321729460 221

can u suggest me any thing regarding this

The class Class has a generic type. You can use a wild-card because you don't know what type it's suppose to be.

Class<?> classDefinition = Class.forName(className);

but there is a problem..when i can use "t1" directly why will i store it in a string variable?...
the problem is i can just use the string(i.e classname) so , typecasting with t1 ( as in (t1) O) doesnt make sense in my context..
i can just use

t1 T = new t1();
T.preent();

instead which simplifies the job ...
i need something that just use the classname not the class

... It works for me.

Here's the full code I'm using:

public class Test
{
	public static void main(String[] args)
	{
		String classname = "t1";
		try
		{
			Class<?> test = Class.forName(classname);
			Object o = test.newInstance();
			if (o instanceof t1)
			{
				((t1) o).print();
			}
 
		}
		catch (ClassNotFoundException exception)
		{
			// TODO Auto-generated catch block
			exception.printStackTrace();
		}
		catch (InstantiationException exception)
		{
			// TODO Auto-generated catch block
			exception.printStackTrace();
		}
		catch (IllegalAccessException exception)
		{
			// TODO Auto-generated catch block
			exception.printStackTrace();
		}
	}
}

and the t1 class:

public class t1
{
	public void print()
	{
		System.out.println("t1 works");
	}
}