null pointer exception

hi am getting null pointer exception in my code,

can anybody explain as why,

try{

FileReader fread =new FileReader("DIS.txt");

BufferedReader bread =new BufferedReader(fread);

int i=0;

do{

text = bread.readLine();

val[i] = text;

i++;

}while(text !=null);

bread.close();

System.out.println("raech");

for(int j=0;j<3900;j++){

System.out.println("value is"+val[i] );

}

}catch(Exception e){

e.printStackTrace();

// System.out.println ("IO exception =" + e );

}

[1226 byte] By [prasadgunasa] at [2007-11-27 8:32:10]