java - solrj error: array out of bounds -

hi im trying run code , can seem figure out wrong..sorry im new solrj

import org.apache.solr.common.solrdocument; import java.util.map; import org.apache.solr.common.solrdocumentlist; import org.apache.solr.common.solrdocument; import java.util.map; import java.util.iterator; import java.util.list; import java.util.arraylist; import java.util.hashmap;  import org.apache.solr.client.solrj.solrserver; import org.apache.solr.client.solrj.solrserverexception; import org.apache.solr.client.solrj.solrquery; import org.apache.solr.client.solrj.impl.commonshttpsolrserver; import org.apache.solr.client.solrj.impl.httpsolrserver; import org.apache.solr.client.solrj.response.queryresponse; import org.apache.solr.client.solrj.response.facetfield;   public class solrjtest {     public void query(string q)     {         //commonshttpsolrserver server = null;         solrserver server = null;          try         {             server = new httpsolrserver("http://localhost:8983/solr/");             //server = new commonshttpsolrserver("http://localhost:8080/solr/");             system.out.println("connected");         }         catch(exception e)         {             system.out.println("not connected");             e.printstacktrace();         }          solrquery query = new solrquery();         query.setquery(q);         query.setquerytype("camera");         query.setfacet(true);         query.addfacetfield("name");         query.addfacetfield("locality4");         query.setfacetmincount(2);         query.setincludescore(true);          try         {             queryresponse qr = server.query(query);              solrdocumentlist sdl = qr.getresults();              system.out.println("found: " + sdl.getnumfound());             system.out.println("start: " + sdl.getstart());             system.out.println("max score: " + sdl.getmaxscore());             system.out.println("--------------------------------");              arraylist<hashmap<string, object>> hitsonpage = new   arraylist<hashmap<string, object>>();               for(solrdocument d : sdl)             {                 hashmap<string, object> values = new hashmap<string, object>();                  for(iterator<map.entry<string, object>> = d.iterator(); i.hasnext();        )                 {                     map.entry<string, object> e2 = i.next();                      values.put(e2.getkey(), e2.getvalue());                 }                   hitsonpage.add(values);                 system.out.println(values.get("displayname") + " (" +  values.get("displayphone") + ")");             }              list<facetfield> facets = qr.getfacetfields();              for(facetfield facet : facets)             {                 list<facetfield.count> facetentries = facet.getvalues();                  for(facetfield.count fcount : facetentries)                 {                     system.out.println(fcount.getname() + ": " + fcount.getcount());                 }             }         }         catch (solrserverexception e)         {             e.printstacktrace();         }      }      public static void main(string[] args)     {         solrjtest solrj = new solrjtest();         solrj.query(args[0]);      } } 

im having error

exception in thread "main" java.lang.arrayindexoutofboundsexception: 0 @ solrjtest.main(solrjtest.java:98) 

and pointing in:

solrj.query(args[0]); 

i have additional question cause before im having output whenever run sample program in solrj

{time=218.0,sub1={time=125.0,sub1.1={time=31.0}}} 

can tell me means , error array out of bounds? in advance need badly , dont know solrj

the reason not supplying runtime parameters while program execution starts.

in solrj.query(args[0]); , args refers parameters passed program like:

java myclass abc def 

so here in above case args :

args[0]   ----->   "abc" args[1]   ----->   "def" 

so make sure passing proper parameters while executing program.