I want to Convert DateTime to Date

I have been trying this out ..below is the code snippet

    public void searchSFDC() {
    	DateTime lastModDate ;
    	for(sObject resultSet : searchResults[0]) { // searching only solutions
    		SfResults sf = new SfResults();
    		lastModDate=Datetime.valueOf(resultSet.get('LastModifiedDate'));
    		sf.lastModifiedDate =   date.newinstance(lastModDate.year(),lastModDate.month(),lastModDate.day());
    }
    public class SfResults {
            public Date lastModifiedDate {get;set;}     
    }

But sf.lastModifiedDate is shown as 2014-04-11 00:00:00  .I do not want the 00:00:00 timestamp .How can we achieve this?