@Test
public void add7(){

    TreeMap<Long,String> treeMap = new TreeMap<Long, String>() ;
    long star = System.currentTimeMillis() ;
    for (int i = 0; i < count; i++) {
        double d = Math.random();
        int ran = (int)(d*100);
        treeMap.put(Long.valueOf(i + ran) ,"127.0.0." + i);
    }
    long end = System.currentTimeMillis() ;
    System.out.println("耗时 " + (end -star));
    System.out.println(treeMap.size());
}