for (Iterator iterator = testSet.iterator(); iterator.hasNext();) {
iterator.next();
count++;
}
System.out.println("iterator:" + (System.currentTimeMillis()-start) + " count:" +count);
start = System.currentTimeMillis();
List<String> testList = new ArrayList<String>(testSet);
count = 0;
for (String string : testList) {
count++;
}
if (s1.indexOf(s4) != -1) {
// 部分一致
