java Application

[anukatoch]

i have records in my arraylist time
id date intime outtime
A01 17 inouttime for that particular date
A01 18
A01 20
A02 21
A02 22
A02 23
i want to show record in muster format
id 1 2 3 4 5 6 7 8 9 10 ---- 17 18 19 20-----til 31ist
A01 inout inout inout
A02 same as follows
i am getting values in jsp
Arraylist time= (Arraylist).request.getAttribute("time");
item= time.get(0);
String current id= item.getid;
Arraylist att= new Arraylist();
Arraylist attdate= new Arraylist();
Arraylist att1= new Arraylist();


for(int i=0;i<time.size();i++)
string id= item.getid();
if(id.eauals(currentid)){
att.add(inout);
attdate.add (date);
} else{
int l=1;
while(l<=31){
for(k=0;k<=att.size;k++){
int s= (INTEGER) attdate.get(k);
if(s==l){
att1.add(att.get(k));
l++;k++;i++}else{
att1.add(null);}
hashmap.put(currentid, att1)
att= new arraylist
currentid=id;
}
this code is throwing me INDEXOUT OF BOUND exception.for first record it is showing me all records till that is store in last record in arraylist att after wards it is giving me the above exception