Solved

Sorting the values of hashtable

Posted on 2003-11-23
1
263 Views
Last Modified: 2010-03-31
This is my part of code..I have hashtable, docIdTable.
CosSimilarity class has two members, DocId and Similarity.
I want to display with sorted Similarity(mainly) and DocId.
Based on this code, it will display..

DocID     Sim
344       33.44
323       23.22
567       12.23
766       12.23
345       12.23

It will sort by similarity. If same similarity, how can I sort by DocID? Thank you

DocID     Sim
344       33.44
323       23.22
345       12.23
567       12.23
766       12.23

ArrayList toArrayList = new ArrayList(docIdTable.values());
object[] toArray = toArrayList.toArray();
Arrays.sort(toArray);
            
for(int i=0; i<toArray.length; i++){
             buf.append(((CosSimilarity)toArray[i]).getDocId());
             buf.append(((CosSimilarity)toArray[i]).getSimilarity());
}                              



public int compareTo(Object o) {
   if (o instanceof CosSimilarity) {
       CosSimilarity t = (CosSimilarity) o;
       return compareTo(t);
   }throw (new ClassCastException());
}
                  
public int compareTo(CosSimilarity t) {                                    if(t.similarity > this.similarity){                                 
                        return 1;
                }else if(t.similarity == this.similarity){
              return 0;
      }else{
                return -1;
                }
 }            
                  
0
Comment
Question by:horizzang
1 Comment
 
LVL 2

Accepted Solution

by:
smitty22 earned 50 total points
ID: 9808233
Write another compareTo method that compares DocIDs.  Modify your compareTo( Object o ) method so that if compareTo( CosSimilarity t ) returns 0, it makes a call to compareTo( DocID d ) to determine the relation.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
allswap challenge 6 79
Eclipse Neon and jdk 1.8.0 11 138
Unable to start eclipse ? 17 133
DO we need Java installed on a Windows PC and WHY ? 13 98
An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now