Loop That Stops Printing A File And Adding To Stack

I'm supposed to add characters to a stack and pop them once the adjacent delimiter is read in from a text file. Moreover, program is supposed to print out the incoming text from the file, but stop when the applicable delimiter is not on top of the stack. As in, a '[' doesn't have a ']'.

I've got the program so it can pop and add to the stack correctly, and stops adding at the correct time, but I cant seem to get it to stop printing. I know a switch statement method in another class seems obvious, but I was trying to practice nested loops.

This is the main program:

import java.io.*;
import java.util.Scanner;
import java.io.IOException;
import java.util.Stack;
public class DelimiterChecker {
public static void main(String [] args) throws IOException {

[Code] ......

Moreover, the file I'm reading for is simply:

{
System.out.println(1)
System.out.println(2)
System.out.println(6 <-------------missing delimiter
System.out.println(7)
}