求和为s的连续正整数序列

题目：

Code:

public class list {

public void printList(int a, int b) {
for (int i = a; i <= b; i++) {
System.out.print(i + " ");
}
System.out.println();
}
public void sumList(int s) {
int start = 1;
int end = 2;
int half = (s + 1) / 2;
int sum = start + end;
while (start < half) {
if (sum == s) {
sum = sum - start;
printList(start, end);
start++;
end++;
sum = sum + end;
} else if (sum < s) {
end++;
sum+=end;
} else {
sum-=start;
start++;
}
}
}

@Test
public void testList() {
sumList(21);
}

}