List Of Custom objects using schema

public  class SchemaExample2 {

     public Map<String,Schema.SobjectType> objects {set;get;}

     public List<SelectOption> options {set;get;}

     public List<String> objNames{set;get;}

     public String selected {set;get;}

     public String describe {Set;get;}

     public SchemaExample2(){

          objects=Schema.getGlobalDescribe();

          options=new List<selectOption>();

          objNames=new List<String>();

          Set<String> keys=objects.keySet();

          objNames.addAll(keys);

          objNames.sort();

          for(String s:objNames){

              Schema.DescribeSobjectResult result=objects.get(s).getDescribe();

              if(result.isCustom()){

                   SelectOption op=new SelectOption(s,s);

                   options.add(op);

              }

          }

     }

     public void getDetails(){

          Schema.DescribeSobjectResult result=objects.get(selected).getDescribe();

          describe=''+result;

     }

    

}

Visualforce Page

<apex:page  controller="SchemaExample2">

     <apex:form>

          <apex:panelGrid columns="3" id="one">

              <apex:selectList value="{!selected}" size="1">

                   <apex:selectOptions value="{!options}" />

     <apex:actionSupport event="onchange"  action="{!getDetails}" reRender="one" />

              </apex:selectList>

              <apex:commandButton value="GetProperties" action="{!getDetails}" />

              <apex:inputTextArea value="{!describe}" rows="5" cols="70" />

          </apex:panelGrid>

     </apex:form>

</apex:page>