Declare Function SendMessage Lib "user32" Alias "SendMessageA" _ (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Integer, _ ByVal lParam As Long) As Long Declare Function FindWindow Lib "user32" Alias _ "FindWin
在数组中查找一个元素,Arrays提供了一个方便查询的方法.Arrays.binarySearch(): 测试列子: public class MainTestArray { public static void main(String args[]){ String[] intArray = new String[]{"a","b","c","d","e","f","g&qu
import java.util.Arrays; public class test2 { public static void main(String[] args) { int winSize = 3; int moveStep = 2; int total = 9; System.out.println("样本为:"); for(int i=0;i<total;i++){ System.out.print(i+" "); } System.out.pri
upnp协议常用于一些智能家居产品中,这些产品连上家里局域网后,用同样连入家中局域网的手机就能很快检测到此产品了.在区块链技术中,upnp也被应用于寻找同一局域网内的其他节点. 关于upnp的具体描述,这篇文章有很好的介绍,Exploring UPnP with Python,欢迎移步查看.我在这里粗略的介绍下.upnp里面有好几种具体的实现方式,这里介绍下用的最多的ssdp.ssdp一般有服务器端和客户端.服务器端会使用udp监听端口1900的广播信息,如果信息里面有“M-SEARCH”开头的