Object List to Hashmap

Question

I have a list of type object as follows,

List<object> recordList

which will contain database record(integer,string) as follows,

[[1,AAAAAAAA],[2,BBBBBB]]

I need to split the data in the list and put into Hashmap<Integer,String> as follows,

I do knw how to split the data form the object list and poplualte the hashmap. How to populate the Hashmap with the data from list?

I found same question here : stackoverflow.com/questions/4100486/… — Lang
– Lang, Commented Nov 20, 2012 at 7:24

Subhrajyoti Majumder · Accepted Answer · 2012-11-20 07:24:10Z

1

List<String> l = new ArrayList<String>();
Map<Integer,String> m = new HashMap<Integer, String>();
Iterator<String> ite = l.iterator();
while(ite.hasNext())
{
    String sTemp[] =ite.next().split(",");
    m.put(Integer.parseInt(sTemp[0]), sTemp[1]);
}

edited Nov 20, 2012 at 7:24

Subhrajyoti Majumder

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answered Nov 20, 2012 at 7:20

Jericho

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Comments

Nikolay Kuznetsov · Accepted Answer · 2012-11-20 07:23:51Z

0

   HashMap<Integer, String> map = new HashMap<Integer, String>();

   for (MyObject element : list) {
       if (element != null)
           map.put(element.getInt(), element.getString());
   }

answered Nov 20, 2012 at 7:23

Nikolay Kuznetsov

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1 Comment

hyde Over a year ago

You could explain your answer a bit, at least tell the assumptions you made (since question is rather vague).

vels4j · Accepted Answer · 2012-11-20 07:26:08Z

0

if your List<object> containsObject[], you can do it like

HashMap<Integer,String> map  = new HashMap<Integer, String>();
for( Object obj : recordList) {
   Object[] objA = (String[]) obj ;
   map.put((Integer) objA[0],(String) objA[1]);
}

answered Nov 20, 2012 at 7:26

vels4j

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Comments

Daniel · Accepted Answer · 2012-11-20 07:27:23Z

0

package listHashMap;
import java.util.*;
public class MyList {
    public static void main(String [] args)
    {
        List<String> aList=new ArrayList<String>();
        Map<Integer,String> aMap = new HashMap<Integer, String>();
        aList.add("AAAA");
        aList.add("BBBB");
        for(int i=0;i<aList.size();i++){
            aMap.put(i+1,aList.get(i));
        }
        System.out.println(aMap.toString());

    }

}

answered Nov 20, 2012 at 7:27

Daniel

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