CareerCup

Furniture - 
Chair - boolean bperformTest ( Stress S) // some implementation
Table - boolean performTest (Stress S) // some implementation

Stress - 
Fire, 
Water

public class Test<F Furniture, S Stress){
Furniture f1;
Stress s1; 

public Test (F, S)[
 f1 = F; 
 s1 = S;
}
boolean performTest(){
	return f1.performTest(s1);
}

// main method
Test<Table, Fire>  tableFiretest = new Test<Table, Fire> (new Table(), new Fire());

boolean value = tableFireTest.performTest();

I think we can use visitor pattern here - Stress class is the visitor, furniture class is the object and chair n table extend it
Furniture class has implementation pointer to material class (wood, metal extend them)
Now in ur test function u can pass furniture ptr and stress ptr
The use of this pattern is that we can increase the instances of stress class easily