Calling check("") on a Test3 should be ambiguous, as there are two
methods with that name and signature, but neither is more specific.

Code snippet:-
class Test<T,E> {
 
    
    public void check(T val){
        System.out.println("Second check method being called");
    }
 
    public E check(E val){
        System.out.println("First check method being called");
        return null;
    }
            
 }
 
 class Test2 extends Test<String,Integer> {
 
 
 }
 
 class Test3 extends Test<String,String> {
 
 
 }
 
 
 public class ParametericMethodsTest3 {
      public void assertion1() {
            Test2 tRef = new Test2();
            tRef.check("");
            tRef.check(new Integer(20));
      }
 
      public void assertion2() {
            Test3 tRef = new Test3();
            // gives compilation error, found void required string
            //String str = tRef.check("");
            tRef.check("");
            
      }
     
      public static void main(String args[]) {
             ParametericMethodsTest3 pRef = new ParametericMethodsTest3();
             pRef.assertion1();
             pRef.assertion2();
      }
 
 
 }