Fast way to read and write console

Question

hi guys
what's the fastest way to read and write from console?
For writing I'm using (I think thats the fastest way)
System.out.println(foo)and I have to read the following - all numbers are ints (that means m + n + 1 lines):
1 * "<n> <m>"
n * "<a> <b> <c>"
m * "<a> <b>"Actual I'm reading (the second line for example) with
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String[] items = br.readLine().split("[^\\-\\.0-9]+");
Target mainTarget = new Target(Integer.parseInt(items[0]), Integer.parseInt(items[1]), Integer.parseInt(items[2]));
for (int i = 1; i < m; i++) {
    items = br.readLine().split("[^\\-\\.0-9]+");
    mainTarget.addTarget(Integer.parseInt(items[0]), Integer.parseInt(items[1]), Integer.parseInt(items[2]));
} But that isn't really fast...
have you any idea?
grz faetzminator

Answer 1

faetzminator wrote:
right, I have 1 + 1 + 1 =3 up to 10^6-1 + 10^6-1 + 1 =2*10^6-1 input lines with max 4999997 integers (and I have to store 2999999 of them)
ok, if that is the fastest way... (maybe the reading of the input file is so slow; I run eg "java Foo < input > output")All those br.readLine calls where you never check if the return is null are dangerous.
I really don't understand what you are doing. You mentioned System.in at first and now reading from files.
I also am pretty sure that you are in fact running out of memory.