u010023489的专栏

HashMap，一个永不满的hashmap,一个和垃圾回收器相依相偎的缓存Map。先看一个例子：[code="java"]package com.qunar.flight.tts.policy.client.validator.impl;import java.util.WeakHashMap;public class Test { public static void main(String[] args) throws Exception {

0xFF |              (b[2] & 0xFF) << 8 |              (b[1] & 0xFF) << 16 |              (b[0] & 0xFF) << 24;  }    public static byte[] intToByteArray(int a) {      return new