Im getting error like List has no rows for assignment to SObject here im giving the code plse tell me what s the error in that controller.

public class AAFControl {
    private ApexPages.StandardController con;    
    private Application_Form__c objAAF;
    private Application_Form__c aaf = new Application_Form__c();
  //public List<Application_Form__c> aaform{get;set;}
    public String LDate{get;set;}
     public String EDate{get;set;}
     public String BDate{get;set;}  
    private String AfName{get;set;}
    public String sDate{get;set;}
     public String stDate{get;set;}
     public String cDate{get;set;}
    public String  dyDate{get;set;}
     public String oDate{get;set;}
     public String eyDate{get;set;}
     public String tDate{get;set;}
     public String  fDate{get;set;}
     public Id pid;
     public Id aafId;
     public AAFControl(ApexPages.StandardController controller) {
        
      con=controller;
      aafId=con.getRecord().id;
      system.debug('iddddddddddddddddddddddd'+aafId);
      aaf=[select Id,Date_of_Issue__c,Expiry_Date__c,Date_of_Birth__c,SPM_O_Level_or_equivalent_Year_of_Comp__c,STPM_A_Level_UEC_or_equivalent_Year__c,Certificate_Year_if_Completion__c,Diploma_Year_if_Completion__c,Others_Year_if_Completion__c,English_1119_Year_of_Completion__c,TOEFL_IELT_Year_of_Completion__c,Form__c from Application_Form__c where id=:aafId];
       system.debug('testtttttttttttttttttt'+aaf);
        //aaf = [select Id,Date_of_Issue__c,Expiry_Date__c,Date_of_Birth__c,SPM_O_Level_or_equivalent_Year_of_Comp__c,STPM_A_Level_UEC_or_equivalent_Year__c,Certificate_Year_if_Completion__c,Diploma_Year_if_Completion__c,Others_Year_if_Completion__c,English_1119_Year_of_Completion__c,TOEFL_IELT_Year_of_Completion__c,Form__c from Application_Form__c where id=:ApexPages.currentPage().getParameters().get('id')][0];
       //aaf = aaform.get(0);
      // aafform=aaf.get(0);
      // system.debug('AAFFFFFFFFFFFFFF'+aafform);
       // pid = aaform.id;
        system.debug('pid'+pid);
        DateTime dt=aaf.Date_of_Issue__c;
        DateTime ed=aaf.Expiry_Date__c;
        DateTime dob=aaf.Date_of_Birth__c;
        DateTime spm=aaf.SPM_O_Level_or_equivalent_Year_of_Comp__c;
        DateTime stpm=aaf.STPM_A_Level_UEC_or_equivalent_Year__c;
        DateTime cyc=aaf.Certificate_Year_if_Completion__c;
        DateTime dyc=aaf.Diploma_Year_if_Completion__c;
        DateTime oyc=aaf.Others_Year_if_Completion__c;
        DateTime eyc=aaf.English_1119_Year_of_Completion__c;
        DateTime toe=aaf.TOEFL_IELT_Year_of_Completion__c;
        DateTime frm=aaf.Form__c;
          sDate=' ';
          stDate=' ';
          dyDate=' ';
          cDate=' ';
          oDate=' ';
          tDate=' ';
          fDate=' ';
          eyDate=' ';
       LDate=dt.format('dd-MM-yyyy');
       EDate=ed.format('dd-MM-yyyy');
         BDate=dob.format('dd-MM-yyyy');
     sDate=spm.format('dd-MM-yyyy');
      stDate=stpm.format('dd-MM-yyyy');
      
       cDate=cyc.format('dd-MM-yyyy');
        
     dyDate=dyc.format('dd-MM-yyyy');
      
      oDate=oyc.format('dd-MM-yyyy');
       
       eyDate=eyc.format('dd-MM-yyyy');
        
     tDate=toe.format('dd-MM-yyyy');
      
      fDate=frm.format('dd-MM-yyyy');
      
     
    }

    public PageReference saveSB() {
       con.save();
       objAAF = new Application_Form__c();
       PageReference pr=null;
       String ObjectPrefix =Application_Form__c.sObjectType.getDescribe().getKeyPrefix();
       pr = new PageReference('/' + ObjectPrefix + '/o');  
       pr.setRedirect(true);
       insert objAAF;
       return pr;
       
    }
   
    
    
    public PageReference getdummyAction() {
         return null;
    }
      public static testMethod void testAccount () {
      
        Account a= new Account(Name='Test Account1');
        insert a;
        ApexPages.currentPage().getParameters().put('Id1',a.Id);
        ApexPages.StandardController controller2 = new ApexPages.StandardController(a);
        AAFControl afc1 = new AAFControl(controller2);
        Application_Form__c aaf1= new Application_Form__c(name='demoapplicationform');
        insert aaf1;
        ApexPages.currentPage().getParameters().put('Id',aaf1.Id);
        ApexPages.StandardController controller1 = new ApexPages.StandardController(aaf1);
        AAFControl afc = new AAFControl(controller1);
        
 
 
        
       }
 
 
 }