Java/Generics/Generic Interface

A generic interface example.

interface MinMax<T extends Comparable<T>> { 
  T min(); 
  T max(); 
} 
 
class MyClass<T extends Comparable<T>> implements MinMax<T> { 
  T[] vals; 
 
  MyClass(T[] o) { vals = o; } 
 
  public T min() { 
    T v = vals[0]; 
    for(int i=1; i < vals.length; i++) 
      if(vals[i].rupareTo(v) < 0) v = vals[i]; 
 
    return v; 
  } 
 
  public T max() { 
    T v = vals[0]; 
 
    for(int i=1; i < vals.length; i++) 
      if(vals[i].rupareTo(v) > 0) v = vals[i]; 
 
    return v; 
  } 
} 
 
public class GenIFDemo { 
  public static void main(String args[]) { 
    Integer inums[] = {3, 6, 2, 8, 6 }; 
    Character chs[] = {"b", "r", "p", "w" }; 
 
    MyClass<Integer> iob = new MyClass<Integer>(inums); 
    MyClass<Character> cob = new MyClass<Character>(chs); 
 
    System.out.println("Max value in inums: " + iob.max()); 
    System.out.println("Min value in inums: " + iob.min()); 
 
    System.out.println("Max value in chs: " + cob.max()); 
    System.out.println("Min value in chs: " + cob.min()); 
  } 
}

Interface Generic (Has compile error)

import java.util.*;
interface BaseInterface<A> {
    A getInfo();
}
class ParentClass implements BaseInterface<Integer> {
    public Integer getInfo()
    {
        return(null);
    }
}
class ChildClass extends ParentClass implements BaseInterface<String> { }
public class BadParents {
    public static void main(String args[])
    {
        Vector<Integer> v1 = new Vector<Integer>();
        Vector v2;
        v1 = v2;
        v2 = v1;
    }
}