Solved

Treemap.getValue()

Posted on 2004-08-10
8
890 Views
Last Modified: 2011-08-18
need help with this bit of code

how do i convert  map.getValue(); to an int

TreeMap map = new TreeMap();
int t = map.getValue();
0
Comment
Question by:HomerrSimpson
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 92

Expert Comment

by:objects
ID: 11768165
depends what type of object it is :)
0
 
LVL 92

Expert Comment

by:objects
ID: 11768168
If its a string use:

int t = Integer.parseInt((String) map.getValue());
0
 

Author Comment

by:HomerrSimpson
ID: 11768201
its an int
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 13

Expert Comment

by:Webstorm
ID: 11768231
Hi HomerrSimpson,

>> its an int
Maybe you mean an Integer object:
int t = ((Integer)map.getValue())).intValue();
0
 
LVL 13

Assisted Solution

by:Webstorm
Webstorm earned 20 total points
ID: 11768249
>> TreeMap map = new TreeMap();
There is no getValue() method in java.util.TreeMap. To get a value from the map you need the key and call the get method:
Object get(Object key)
0
 

Author Comment

by:HomerrSimpson
ID: 11768305
ahh yeah that was typo this is what i got
i am using Map.Entry that had a getValue()

TreeMap map = new TreeMap();
Set entries = map.entrySet();
Iterator iter = entries.iterator();
            
 while (iter.hasNext()) {
               Map.Entry entry = (Map.Entry)iter.next();
               String term = (String)entry.getKey();

int t = ((Integer)entry.getValue())).intValue(); <--doesnt work either

0
 

Author Comment

by:HomerrSimpson
ID: 11768312
ahh it does work an extra ) was there
0
 
LVL 7

Accepted Solution

by:
lhankins earned 30 total points
ID: 11769549
What did you put in the map...?   A String or an Integer...?   This will determine how you go about retrieving it.   For example, you can put things in the map in one of the following ways:

   //--- add a String representation of an int...
   map.put ("a", "123");  

   //--- add an Integer wrapper around an int..
   map.put ("a", new Integer(123));

Either way, you can convert the value back to an int primitive (but your extraction technique will depend on what type the value is).  For example, if you added it as a String :

               Map.Entry entry = (Map.Entry)iter.next();
               String term = (String)entry.getKey();

               String strValue = (String)entry.getValue();
               int intValue = Integer.parseInt(strValue);
 
If you added it as an Integer :


               Map.Entry entry = (Map.Entry)iter.next();
               String term = (String)entry.getKey();

               Integer intWrapper = (Integer)entry.getValue();
               int intValue = intWrapper.intValue();


0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

Suggested Solutions

Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…

803 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