how to interpret the serial data

Proper use of capital letters and punctuation would really be appreciated here. You sound like a little boy whining.

You keep saying you want to store A character, and then you say that the character is 0999999999.

Well, I have news for you. 0999999999 is not a character. It is a string.

If you want to ask about how to read characters, and store them in an array AS A string, then say that. Don't keep referring to 0999999999 as a character.

i'm so sorry for that....im unfamiliar with this,,,
ahm..is it possible to use the switch case function??plz help me

I've shown you how to wait for and read one character into one particular buffer called "inChar", and make a decision based on the value of that character.
It isn't a great leap of imagination to read in further characters and read them into other buffers.

how can i do this?any advice?

Some application, a little effort, and maybe work through some of the examples supplied in the IDE.

plz...give me a specfic examples

It's been a while since I looked at the IDE supplied examples, but I'm pretty sure there's (at least) one on serial comms, and another on arrays.
I'd start with those.

please give me the very specific examples in IDE pls???

I'm posting from my tablet, so I'm afraid I can't.
What did you do to help yourself in the fifteen minutes between my last post and yours?

The problem looks to be that you're never printing the value of "inData" when it has some dta a in it.
Move the final "print" inside the "started && ended" condition, but before you reset the string.

The problem?
You didn't open the serial monitor, you didn't select the correct line speed, you didn't compile the code, you didn't upload the code, you didn't hit "send"...
It works, perfectly.

im sory....it works it print but the problem is it auto scroll...

You'll have to explain what that means, and why you perceive it to be a problem.

THANK YOU very much...is it functional of what i want to do as what i said in my first post?

is it functional if the computer will send two type of data for example {fff},is it posible to use two start and end maker...

is it posible to use two start and end maker...

Yes, but...

<jvvmv,fff> is easier to deal with. Save all the data, then use strtok() to parse into jvvmv and fff.

With two start and end markers, you need two arrays, and you need to keep track of which array to store a character in. Does f go in the first buffer or the second buffer?

what i need to do?

you need to start thinking for longer than 20 minutes at a time, and working through some of the examples in the IDE.
I believe I've said this before, but it's worth repeating.

(Hint: you haven't written anything called "sendCommand" yet.)

i got it...thank you very much

This example may help you grasp the basics.

Code for Arduino:

void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.println(analogRead(A0));
  delay(2);
}

Code for Processing:

 import processing.serial.*;
 
 Serial myPort;        // The serial port
 int xPos = 1;         // horizontal position of the graph
 
 void setup () {
 // set the window size:
 size(400, 300);        
 
 // List all the available serial ports
 println(Serial.list());
 // I know that the first port in the serial list on my mac
 // is always my  Arduino, so I open Serial.list()[0].
 // Open whatever port is the one you're using.
 myPort = new Serial(this, Serial.list()[0], 9600);
 // don't generate a serialEvent() unless you get a newline character:
 myPort.bufferUntil('\n');
 // set inital background:
 background(0);
 }
 void draw () {
 // everything happens in the serialEvent()
 }
 
 void serialEvent (Serial myPort) {
 // get the ASCII string:
 String inString = myPort.readStringUntil('\n');
 
 if (inString != null) {
 // trim off any whitespace:
 inString = trim(inString);
 // convert to an int and map to the screen height:
 float inByte = float(inString); 
 inByte = map(inByte, 0, 1023, 0, height);
 
 // draw the line:
 stroke(127,34,255);
 line(xPos, height, xPos, height - inByte);
 
 // at the edge of the screen, go back to the beginning:
 if (xPos >= width) {
 xPos = 0;
 background(0); 
 } 
 else {
 // increment the horizontal position:
 xPos++;
 }
 }
 }