11Java

11.1URL11.2URL11.3URLhtml11.411.5InetAdress11.611.7 11.8UDP 11.9

11.1 URL

URLUniform Resource LocatorURLURLURLURLURL URL .

URLpublic URL(String spec) throws MalformedURLExceptiontry { url=new URL("http://www.tup.tsinghua.edu.cn"); }catch(MalformedURLException e) { System.out.println ("Bad URL:"+url); }

11.2 URL

URLInputStream openStream() URL

11.3 URLhtml

Javax.swingJEditorPanehtmlhtmlJEditorPanehtmlJEditorPane

11.4

JEditorPanesetEditablefalseJEditorPaneHyperlinkEventHyperlinkEventURL

11.5 InetAdress

java.netInetAddressInternetIP www.sina.com.cn/202.108.35.210DNSIP

11.6

IPInternet IP

try{ Socket mysocket=newSocket(http://192.168.0.78,1880); }catch(IOException e){}

mysocket mysocketgetInputStream() mysocketgetOutputStream()

ServerSocketServerSocketServerSocket(int port)portportServerSocketserver_socketaccept()accept()SocketSocketSocketscgetOutputStream()SocketmysocketgetInputStream()SocketscgetInputStream()SocketmysocketgetOutputStream()

11.7 ZipOutputStreamZipOutputStreamZipOutputStreamoutZipOutputStreamZipOutputStreampublic ZipOutputStream(OutputStream out)

11.8 UDP

UDPTCPUDP UDP 1 2

1 DatagramPacket DatagramPacket(byte data[], int length, InetAddtress address,int port)dataaddressport DatagramSocketDatagramSocket()

2 DatagramSocketDatagramSocket(int port) DatagramSocketreceive(DatagramPacket pack) .

11.9

Interneta.b.c.da128b.c.dAa128192a.bc.dBa192a.b.cdC224.0.0.0~224.255.255.255DDDDABCD