How do we get the next task Id of a User Input Task. This has to be entered in t

I am getting a null pointer exception when I put the following code with the interface implementation of processExecutionService

Long[] currentTasksForProcess = new Long[100];
ProcessExecutionService processExecutionService = new ProcessExecutionService() {
                              
                              @Override
                              public void setServiceContext(ServiceContext arg0) {
                                        // TODO Auto-generated method stub
                                        
                              }
ResultPage resultPage;
resultPage = processExecutionService.getCurrentTasksForProcess(processID, com.appiancorp.suiteapi.process.ProcessExecutionService.UNATTENDED_AND_ATTENDED_TASKS, 1, 10, TaskSummary.SORT_BY_ID, Constants.SORT_ORDER_ASCENDING);
                              currentTasksForProcess = (Long[])resultPage.getResults();

What could be the root cause of this null pointer exception?

Is processExecutionService() null or currentTasksForProcess() .

The error is at line 1787 which is this:-

resultPage = processExecutionService.getCurrentTasksForProcess(processID, com.appiancorp.suiteapi.process.ProcessExecutionService.UNATTENDED_AND_ATTENDED_TASKS, 1, 10, TaskSummary.SORT_BY_ID, Constants.SORT_ORDER_ASCENDING);
                              currentTasksForProcess = (Long[])resultPage.getResults();

I am getting a null pointer exception when I put the following code with the interface implementation of processExecutionService

Long[] currentTasksForProcess = new Long[100];
ProcessExecutionService processExecutionService = new ProcessExecutionService() {
                              
                              @Override
                              public void setServiceContext(ServiceContext arg0) {
                                        // TODO Auto-generated method stub
                                        
                              }
ResultPage resultPage;
resultPage = processExecutionService.getCurrentTasksForProcess(processID, com.appiancorp.suiteapi.process.ProcessExecutionService.UNATTENDED_AND_ATTENDED_TASKS, 1, 10, TaskSummary.SORT_BY_ID, Constants.SORT_ORDER_ASCENDING);
                              currentTasksForProcess = (Long[])resultPage.getResults();

What could be the root cause of this null pointer exception?

Is processExecutionService() null or currentTasksForProcess() .

The error is at line 1787 which is this:-

resultPage = processExecutionService.getCurrentTasksForProcess(processID, com.appiancorp.suiteapi.process.ProcessExecutionService.UNATTENDED_AND_ATTENDED_TASKS, 1, 10, TaskSummary.SORT_BY_ID, Constants.SORT_ORDER_ASCENDING);
                              currentTasksForProcess = (Long[])resultPage.getResults();