Compile time error

gistfile1.java

public class Gen {

  public static void main(String[] args) {
    
    Foo<Integer> a = new Foo<Integer>(123);
//   Baz b = new Baz("aha");

    System.out.println(a.bar.toString());
//    System.out.println(b.bar);

  }

}



class Foo<T> {

  public T bar;

  public Foo(T bar)
  {
    this.bar = bar;
  }

}

class Baz extends Foo<String> {


}


/**** Error ****/

Gen.java:27: error: constructor Foo in class Foo<T> cannot be applied to given types;
class Baz extends Foo<String> {
^
  required: String
  found: no arguments
  reason: actual and formal argument lists differ in length
  where T is a type-variable:
    T extends Object declared in class Foo
1 error