Question

Using API

Asked by: Squadless

ok so i found a method on that site which is  

java.util.Vector intersection(java.util.Vector v1, java.util.Vector v2, boolean sorted)
          Returns the intersection of two vector.

on this website
http://joggplayer.webarts.bc.ca/html/docs/api/kiwi/util/VectorUtils.html

how do i call the intersection function... i keep getting undefined...what do i have to do?

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Asked On
2006-11-25 at 18:47:41ID22072373
Tags

intersection

Topic

Java Programming Language

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: sudhakar_koundinyaPosted on 2006-11-25 at 19:55:36ID: 18013352

Hi there

the documentation what you have seen is developed by some other person and is not a part of sun API.

This simple solution will help you to get the intersection of two lists

public static java.util.Vector intersection  (java.util.Vector a,  java.util.Vector b)
      {
            java.util.HashSet c= new java.util.HashSet();
            for(int i=0;i<a.size();i+=1)
            {
                  for(int j=0;j<b.size();j++)
                  {      
                        if(a.elementAt(i).equals(b.elementAt(j)))
                        {
                              c.add(a.elementAt(i));
                        }
                  }
            }
            return new java.util.Vector(c);

      
      
      }


calling the above code,,,,
               java.util.Vector a=new java.util.Vector();
            a.add(1);a.add(3);a.add(2);

            java.util.Vector b=new java.util.Vector();
            b.add(3);b.add(4);b.add(2);
            java.util.Vector c=      intersection(a,b) ;
            System.err.println(c);

 

by: hoomanvPosted on 2006-11-25 at 22:03:21ID: 18013541

Or use Apache Commons Collections, which have methods for intersection, union, etc
http://jakarta.apache.org/commons/collections/api-release/index.html

 

by: hoomanvPosted on 2006-11-25 at 22:07:28ID: 18013557

Your API is just the same

VectorUtils util = new VectorUtils();
Vector intersection = util.intersection(v1, v2, false); // or true in case the vectors are sorted

20120131-EE-VQP-002

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