Overriding a generic method in a generic class.

/*
Java 2, v5.0 (Tiger) New Features
by Herbert Schildt
ISBN: 0072258543
Publisher: McGraw-Hill/Osborne, 2004
*/

class Gen<T> {  
  T ob; // declare an object of type T  
    
  // Pass the constructor a reference to   
  // an object of type T.  
  Gen(T o) {  
    ob = o;  
  }  
  
  // Return ob.  
  T getob() {  
    System.out.print("Gen's getob(): " ); 
    return ob;  
  }  
}  
 
// A subclass of Gen that overrides getob(). 
class Gen2<T> extends Gen<T> { 
 
  Gen2(T o) { 
    super(o); 
  } 
   
  // Override getob(). 
  T getob() {  
    System.out.print("Gen2's getob(): "); 
    return ob;  
  }  
} 
  
// Demonstrate generic method override. 
public class OverrideDemo {  
  public static void main(String args[]) {  
    
    // Create a Gen object for Integers. 
    Gen<Integer> iOb = new Gen<Integer>(88); 
 
    // Create a Gen2 object for Integers. 
    Gen2<Integer> iOb2 = new Gen2<Integer>(99);  
   
    // Create a Gen2 object for Strings. 
    Gen2<String> strOb2 = new Gen2<String>("Generics Test");  
 
    System.out.println(iOb.getob()); 
    System.out.println(iOb2.getob()); 
    System.out.println(strOb2.getob()); 
  }  
}

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Overriding a generic method in a generic class. : Generic Method « Generics « Java

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