All the sources codespage 71

public boolean isNegative(int i) {
    String s = Integer.parseInt(i);
    return s.startsWith("-");
}

// I don't know if this is usefull, but i'am too scared to delete it

int length = 0;
for(int idx = 0; idx < a.length; i++) {
     length++;
}
System.out.println("length is : " + length);