File processing please help!

Hello,
I know this is not server-side topic, but perhaps someone could help me. I am trying a file-processing with a large file (50 mb).
The File is splitted according to a condition in the if clauses and the different rows should be written to 9 target files. Here's the code:


public void splitData (String source1, String t00, String t10,String t20,String t30,String t40,String t50,String t60,String t70,String t80)
{
String line;
BufferedWriter t0,t1,t2,t3,t4,t5,t6,t7,t8;
BufferedReader s;

try
{
s = new BufferedReader(new FileReader(source1));
t0 = new BufferedWriter(new FileWriter(t00));
t1 = new BufferedWriter(new FileWriter(t10));
t2 = new BufferedWriter(new FileWriter(t20));
t3 = new BufferedWriter(new FileWriter(t30));
t4 = new BufferedWriter(new FileWriter(t40));
t5 = new BufferedWriter(new FileWriter(t50));
t6 = new BufferedWriter(new FileWriter(t60));
t7 = new BufferedWriter(new FileWriter(t70));
t8 = new BufferedWriter(new FileWriter(t80));

System.out.println("Splitting file..."+source1);

int total=0;
// long anfang = System.currentTimeMillis();

while ((line = s.readLine()) != null)
{
if ((line.substring(70,72)).equals("00")) {t0.write(line);t0.newLine();}
if ((line.substring(70,72)).equals("10")) {t1.write(line);t1.newLine();}
if ((line.substring(70,72)).equals("20")) {t2.write(line);t2.newLine();}
if ((line.substring(70,72)).equals("30")) {t3.write(line);t3.newLine();}
if ((line.substring(70,72)).equals("40")) {t4.write(line);t4.newLine();}
if ((line.substring(70,72)).equals("50")) {t5.write(line);t5.newLine();}
if ((line.substring(70,72)).equals("60")) {t6.write(line);t6.newLine();}
if ((line.substring(70,72)).equals("70")) {t7.write(line);t7.newLine();}
if ((line.substring(70,72)).equals("80")) {t8.write(line);t8.newLine();}

total++;

}



The problem is that processing starts but after a while I get:

java.lang.OutOfMemoryError: no stack trace available

I think the problem is the file size, with a small file (21kb), it works fine... but I have to process this big file