Manipulação de arquivo txt em java

public class Split {

	public static void main(String args[]) {

		String str = "one-two-three";
		String[] temp;

		/* delimeter */
		String delimeter = "-";

		/* given string will be splitted by the argument delimeter provided. */
		temp = str.split(delimeter);

		/* print splitted substrings */
		for (int i = 0; i < temp.length; i++)
			System.out.println(temp[i]);

		/*
		 * 
		 * IMPORTANT : Some special characters needs to be escaped while
		 * providing them as
		 * 
		 * delimeters like "." and "|".
		 */
		System.out.println("");
		str = "one;two;three;four;five;six";
		delimeter = "\;";
		temp = str.split(delimeter);

		for (int i = 0; i < temp.length; i++)
			System.out.println(temp[i]);

	}
}

public class Tokenizer {

	public static void main(String[] args) {
		String s = "/this is/a test of the/class// and/all//last";
		char delimiter = '/';

		// calculate number of delimiter characters
		int N = 0;
		for (int i = 0; i < s.length(); i++)
			if (s.charAt(i) == delimiter)
				N++;
		String[] tokens = new String[N + 1];

		// parse N+1 tokens and store in an array
		int right = 0, left = 0;
		for (int i = 0; i < N; i++) {
			while (s.charAt(right) != delimiter)
				right++;
			tokens[i] = s.substring(left, right);
			right++;
			left = right;
		}
		tokens[N] = s.substring(right, s.length());

		// print results for testing
		for (int i = 0; i < tokens.length; i++)
			System.out.println(i + ": " + tokens[i]);
	}
}