A method for bubble sort

Exercise9_9.java

public class Exercise9_9 {
  public static void main(String[] args) {
		String [] s1 = {"a", "b", "e", "f", "g", "d", "c", "h"};
		sort(s1);
		for (int i = 0; i < s1.length; i++) {
			if (i < s1.length - 1) {
				System.out.print(s1[i] + ", ");				
			}
			else {
				System.out.print(s1[i] + ".");				
			}
		}
	}

	// A method for bubble sort.
	public static void sort(String[] s1) {
		int i;
		boolean flag = true;
		String temp;
		while (flag) {
			flag = false;
			for (i = 0; i < s1.length - 1; i++) {
				if (s1[i].compareToIgnoreCase(s1[i + 1]) > 0) {
					temp = s1 [i];
					s1[i] = s1[i + 1];
					s1[i + 1] = temp;
					flag = true;
				}
			}
		}
	}
}