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Compiling with the Java Compiler API
µ÷ÓÃJava±àÒëÆ÷API±àÒëJava
´ÓµÚÒ»Ì쿪ʼ,±ê×¼Javaƽ̨¾ÍȱÉÙÄܹ»±»µ÷ÓÃ,È¥²úÉúJava×Ö½ÚÂëµÄ±àÒëÆ÷½Ó¿Ú. ʹÓÃSunʵÏֵį½Ì¨,Ò»¸öÓû§¿ÉÒÔͨ¹ý·Ç±ê×¼µÄ com.sun.tools.javac  °üÖеÄMain class È¥±àÒëÄãµÄ´úÂë (Äã¿ÉÒÔÔÚlib×ÓĿ¼Ï嵀 tools.jar ÎļþÀïÕÒµ½Ëü). È»¶øÕâ¸ö°ü²¢Ã»ÓÐÌṩһ¸ö±ê×¼µÄ¹«¿ªµÄ±à³Ì½Ó¿Ú. ʹÓÃÆäËüʵÏÖµÄÓû§±ØÈ»²»ÄÜ·ÃÎÊÕâ¸öÀà. ʹÓÃJava SE 6ºÍÔÚJSR-199Öж¨ÒåµÄËüµÄеÄJava±àÒëÆ÷½Ó¿Ú,Äã¿ÉÒÔ´ÓÄã×Ô¼ºµÄÓ¦ÓóÌÐòÀï·ÃÎÊjavac±àÒ빤¾ßÁË.
ÓÐÁ½ÖÖ·½Ê½Ê¹ÓÃÕâÖÖ¹¤¾ß. Ò»ÖÖÊǼòµ¥µÄ,Ò»ÖÖÊÇÉÔ΢¸´Ôӵ㵫ӵÓиü¶àÑ¡ÏîµÄ. ÄãÊ×ÏȽ«»áÓýϼòµ¥µÄÒ»ÖÖÈ¥±àÒë "Hello, World"³ÌÐò,¾ÍÊÇÏÂÃæµÄÕâ¸ö:
 
public class Hello {
  public static void main(String args[]) {
    System.out.println("Hello, World");
  }
}  
 
ÒªÏë´ÓJava³ÌÐòÀïµ÷ÓÃJava±àÒëÆ÷,ÄãÐèÒª·ÃÎÊJavaCompiler ½Ó¿Ú. ³ý´ËÍâ,ͨ¹ý·ÃÎÊÕâ¸ö½Ó¿Ú,Äã¿ÉÒÔÉèÖÃÔ´´úÂëµÄ·¾¶,classpath,ºÍÄ¿±êĿ¼. ͨ¹ýÖ¸¶¨¿É±àÒëµÄÎļþΪ JavaFileObjectinstance ,Äã¿ÉÒÔ½«ËüÃÇÈ«²¿±àÒë. È»¶ø,Äã²¢²»ÐèÒª¶Ô JavaFileObject Á˽â¶àÉÙ.
¿ÉÒÔʹÓà ToolProvider ÀàÈ¥ÇëÇó theJavaCompiler ½Ó¿ÚµÄȱʡʵÏÖ. Õâ¸ö ToolProvider ÀàÌṩÁËÒ»¸ö getSystemJavaCompiler() ·½·¨, Ëü·µ»ØÒ»¸ö JavaCompiler ½Ó¿ÚµÄʵÀý.
 
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();  
 
ʹÓà JavaCompiler ÔËÐбàÒë×î¼òµ¥µÄ·½·¨Êǵ÷ÓÃÔÚÕâ¸ö½Ó¿Ú¹¤¾ßÀﶨÒåµÄ run() ·½·¨,ËüµÄʵÏÖÊÇ:
 
int run(InputStream in, 
    OutputStream out, 
    OutputStream err, 
    String... arguments)  
 
·Ö±ðΪǰÈý¸öȱʡ²ÎÊý System.in, System.out, and System.err ´«Èë null Öµ. ²ÎÊý¼¯ String ¶ÔÏó±íʾ×Å´«Èë±àÒëÆ÷µÄÎļþµÄÃû³Æ.
ÕâÑù,ÄãÓ¦¸ÃÏñÏÂÃæÕâÑùÈ¥±àÒëÇ°ÃæÏÔʾµÄ Hello Ô´³ÌÐò:
 
int results = tool.run(null, null, null, "Hello.java");  
 
¼ÙÉèûÓбàÒë´íÎó,ÕâÑù»áÔÚÄ¿±êĿ¼Àï²úÉúÒ»¸ö Hello.classÎļþ. Èç¹ûÕâÀïÓдíÎó, run() ·½·¨»á°ÑËüÊä³öµ


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javaʹÓÃrocksawºÍvserv tcpipʵÏÖ»ùÓÚICMPµÄPing¹¦ÄÜ

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 1.  build vserv-tcpip-0.9.2-src
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class yiwei
{
   public static void main(String [] args)
   {
      int i = -4;
      int c = i>>>1;
      System.out.println(c);
   ......

Use Java Mail API to Send Email

private String smtpHost;
private String smtpUserName;
private String smtpPassword;
public void sendEmail(String fromAddress, List<String> toAddresses, List<String> ccAddresses,
String subject, String message) {
Properties props = new Properties();
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