function readOnly(count){ }
Sign Up ›
Starting November 20, the site will be set to read-only. On December 4, 2023,
forum discussions will move to the Trailblazer Community.
Learn More

Browse by Topic
ShowAll Questionssorted byDate Posted
+ Start a Discussion
babu Balaganibabu Balagani 

List index out of bounds: -69

Hi All,

By this code I am trying to do pagination.

list of records = 131.

when I am trying to click on (>>) button a nd imediately when I click on (<) button, it shown the error as: List index out of bounds: -69
please help me.


Thanks in advance

public List<wrapper> getInventories()
      {
       
        if(StIndex == 0)
        {
            fir = false;
            last = true;
          
           
            if (lstWrapper.size()==0){
            start_record = 0;
            total_records=0;
            }
           
          
           
            else start_record = 1;
            total_records = lstWrapper.size();
            If(lstWrapper.size()<totalNumberOfRecord)
            {
                end_record = lstWrapper.size();
                last = false;
            }
            else
            {
                last = true;
                end_record = totalNumberOfRecord;
            }
        }
        else if(EndIndex == lstWrapper.size()-1)
        {
            fir = true;
            last = false;
            end_record =lstWrapper.size();
        }
        else
        {
            fir = true;
            last = true;
        }
        if(StIndex != -1 && EndIndex != -1)
        {
           
            List<wrapper> lstW = new List<wrapper>();
           
            if(EndIndex > lstWrapper.size()-1)
            {
                EndIndex = lstWrapper.size()-1;
            }
           
           
            for(integer i=StIndex;i<=EndIndex;i++)
            {
           
                lstW.add(lstWrapper[i]);   >>>>>>>>>>>>>>>>>>>>>>>>>>>>>  error
            }
            return lstW;
       
      
       }
        return lstWrapper;
      }
   public pagereference next()
        {
              if(EndIndex == lstWrapper.size()-1){
                return null;
            }
            StIndex = EndIndex+1;
            EndIndex = EndIndex + totalNumberOfRecord;
            if(EndIndex > lstWrapper.size()-1){
                EndIndex = lstWrapper.size()-1;
            }
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;          
        }
        public pagereference previous()
        {
            
             if(StIndex == 0){
                return null;
            }
            if(EndIndex < StIndex)
            {
              StIndex = lstWrapper.size() - totalNumberOfRecord; 
            }
            EndIndex = StIndex-1;
            StIndex = StIndex - totalNumberOfRecord;
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;
        }
        public pagereference first()
        {
             if(StIndex == 0){
                return null;
            }
            StIndex = 0;
            if(EndIndex > lstWrapper.size()-1){
               EndIndex = lstWrapper.size()-1;
            }else{
                EndIndex = totalNumberOfRecord-1;
            }
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;    
        }
        public pagereference last()
        {
             if(EndIndex == lstWrapper.size()-1){
                return null;
            }           
            EndIndex = lstWrapper.size()-1;                        
            StIndex = lstWrapper.size()-totalNumberOfRecord;
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;   
        }
Best Answer chosen by babu Balagani
Sagarika RoutSagarika Rout
I think you are getting "lstWrapper"  list as null values. No where in code you are checking for condition .
I have modified the code , Please check, I hope you will not get this error now.

public List<wrapper> getInventories()
      {
       
        if(StIndex == 0)
        {
            fir = false;
            last = true;
          
           
            if (lstWrapper.size()==0){
            start_record = 0;
            total_records=0;
            }
           
          
           
            else start_record = 1;
            total_records = lstWrapper.size();
            If(lstWrapper.size()<totalNumberOfRecord)
            {
                end_record = lstWrapper.size();
                last = false;
            }
            else
            {
                last = true;
                end_record = totalNumberOfRecord;
            }
        }
        else if(EndIndex == lstWrapper.size()-1)
        {
            fir = true;
            last = false;
            end_record =lstWrapper.size();
        }
        else
        {
            fir = true;
            last = true;
        }
        if(StIndex != -1 && EndIndex != -1)
        {
           
            List<wrapper> lstW = new List<wrapper>();
           
            if(EndIndex > lstWrapper.size()-1)
            {
                EndIndex = lstWrapper.size()-1;
            }
           
           if(!lstWrapper.isEmpty()){// check whether you are getting list as empty or not
		     for(integer i=StIndex;i<=EndIndex;i++)
               {
                   lstW.add(lstWrapper[i]);   >>>>>>>>>>>>>>>>>>>>>>>>>>>>>  error
               }
             
		   }
            
          return lstW;
      
       }
        return lstWrapper;
      }
   public pagereference next()
        {
              if(EndIndex == lstWrapper.size()-1){
                return null;
            }
            StIndex = EndIndex+1;
            EndIndex = EndIndex + totalNumberOfRecord;
            if(EndIndex > lstWrapper.size()-1){
                EndIndex = lstWrapper.size()-1;
            }
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;          
        }
        public pagereference previous()
        {
            
             if(StIndex == 0){
                return null;
            }
            if(EndIndex < StIndex)
            {
              StIndex = lstWrapper.size() - totalNumberOfRecord; 
            }
            EndIndex = StIndex-1;
            StIndex = StIndex - totalNumberOfRecord;
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;
        }
        public pagereference first()
        {
             if(StIndex == 0){
                return null;
            }
            StIndex = 0;
            if(EndIndex > lstWrapper.size()-1){
               EndIndex = lstWrapper.size()-1;
            }else{
                EndIndex = totalNumberOfRecord-1;
            }
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;    
        }
        public pagereference last()
        {
             if(EndIndex == lstWrapper.size()-1){
                return null;
            }           
            EndIndex = lstWrapper.size()-1;                        
            StIndex = lstWrapper.size()-totalNumberOfRecord;
            system.debug('StIndex-----'+StIndex);
            system.debug('EndIndex -----'+EndIndex);
            return null;   
        }