Stop all scheduled jobs in Salesforce

gistfile1.java

              List<CronTrigger> listCronTrigger = [SELECT Id, CronExpression, EndTime, NextFireTime, OwnerId,
                               PreviousFireTime, StartTime, State, TimesTriggered, TimeZoneSidKey FROM CronTrigger 
                               WHERE State != 'DELETED'];
               
               System.debug('#### Number of jobs: '+listCronTrigger.size());
               if (listCronTrigger.size() > 0)
               {
                       for (CronTrigger aCronTrigger : listCronTrigger)
                       {
                               System.abortJob(aCronTrigger.Id);
                               System.debug('#### deleted Job details :' + String.valueOf(aCronTrigger));
                       }
               }