int e1 = s1.next(); if (e1 == CollationElementIterator.NULLORDER) {
int e0, e1; do { e1 = s1.next(); } while (e1 == 0); if (e1 == -1) {
    private final static boolean collationStartsWith(CollationElementIterator s0,             CollationElementIterator s1) {        while (true) {            int e1 = s1.next();            if (e1 == CollationElementIterator.NULLORDER) {                return true;            }            int e0 = s0.next();            if (e0 != e1) {                return false;            }        }    }