在哪里放置PrintStream对象以打印变量java

Question

I have a code that generates combinations and prints to screen, I'd like to print this to a file but Im not sure where to put my PrintStream object to have access to the String I'd like to print.

public class Main {
public static void main(String args[]) {
    brute("12345", 5, new StringBuffer());
}
static void brute(String input, int depth, StringBuffer output) {
    if (depth == 0) {
        System.out.println(output);
    } else {
        for (int i = 0; i < input.length(); i++) {
            output.append(input.charAt(i));
            brute(input, depth - 1, output);
            output.deleteCharAt(output.length() - 1); 
            }
        }   
    }
}

Thanks,

Answer 1

Just add PrintStream as one of the parameters for your brute() method and pass it along for the recursive call. Then in your main you just need:

FileOutputStream fileOut = new FileOutputStream("output.txt");
brute("12345", 5, new StringBuffer(), new PrintStream(fileOut));

Answer 2

One way is to have a Static PrintWriter variable that your method writes to rather than the System.out. Just be sure to close the variable in a finally block in your main method after calling your recursive method.