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Thread: int cannot be dereferrenced

  1. #1
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    Default int cannot be dereferrenced

    Process scheduledProcess;
     
     
    private void assignNextProcess(){
     
                if (queue1.size() != 0){
     
                    scheduledProcess.add(Scheduler.SRTF.getNext(queue1));
     
                    if (scheduledProcess.getBurstTime(0) == scheduledProcess.getTimeRemaining(0)){
                        scheduledProcess.getResponseTime(0).add(time.remove(scheduledProcess.getArrivalTime(0)));
                    }
     
                    queue1.remove(scheduledProcess);
     
                    String msg = "Assigned Process " + scheduledProcess.getProcessNumber(0) + " to CPU";
                }
     
                else if (queue2.size() != 0){
     
                    scheduledProcess = Scheduler.NPP.getNext(queue2);
     
                    if (scheduledProcess.getBurstTime(0)==(scheduledProcess.getTimeRemaining(0))){
                        scheduledProcess.getResponseTime(0).add(time.remove(scheduledProcess.getArrivalTime(0)));
                    }
     
                    queue2.remove(scheduledProcess);
     
                    String msg = "Assigned Process " + scheduledProcess.getProcessNumber(0) + " to CPU";
                }
     
                else if (queue3.size() != 0){
     
                    scheduledProcess.add(Scheduler.FCFS.getNext(queue3));
     
                    if (scheduledProcess.getBurstTime(0)==(scheduledProcess.getTimeRemaining(0))){
                        scheduledProcess.getResponseTime(0).add(time.remove(scheduledProcess.getArrivalTime(0)));
                    }
     
                    queue3.remove(scheduledProcess);
     
                    String msg = "Assigned P" + scheduledProcess.getProcessNumber(0) + " to CPU";
                }
            }
     
    public class Process(){
       public int getBurstTime(int BurstTime) {
       		 return BurstTime;
       }
       public int getArrivalTime(int ArrivalTime) {
       	 	 return ArrivalTime;
       }
       public int getProcessNumber(int ProcessNumber) {
       		 return ProcessNumber;
       }
       public int getTimeRemaining(int TimeRemaining){
       		 return TimeRemaining;
       }
    }

    when i run this file, there's an error in the lines, and the other lines in the if statements, like this if statement, it has an error.

    if (scheduledProcess.getBurstTime(0) == scheduledProcess.getTimeRemaining(0)){
    scheduledProcess.getResponseTime(0).add(time.remov e(scheduledProcess.getArrivalTime(0)));
    }

    the error is "int cannot be dereferrenced" and its pointing out to the code in this if statement. what should I change in this code?


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: int cannot be dereferrenced

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  3. #3
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    Default Re: int cannot be dereferrenced

    I'm going to take a guess and say that scheduledProcess.getResponseTime(0) returns a primitive int, and you are trying to do something like 0.add() to it, which doesn't work because primitives don't have methods. Try using += instead of add().