Different behaviour between Processing and Arduino Serial Monitor

Processing Electronics (Arduino, etc.)
5

hi

iam using slider and this code work with me

void bob() {  
  
 
  
     if (Serial.available() >= 2)
 
  {
    int value2;
    char command = Serial.read();
    switch (command)
    {
    case 'a': value2 = Serial.parseInt();
      CYCLE_TIME = value2;
     
      {
    
   
     
     
      break;

    case 'b': value2 = Serial.parseInt();
     TX_PULSE = value2;
       
   break;
      
  
      

   
     }

try this code or modify it as your demand

   if (Serial.available())
  {
   int value2;
    
 char   option = Serial.read();
  }

  switch (option)
  {
    case 'a':value2 = Serial.parseInt();
     
      a =value2
      break;
    case 'z':value2 = Serial.parseInt();
      
      z=value2
      break;
       }