JAVAµ÷ÓÃDOCÃüÁî
public class test {
public static void main(String argv[]) {
try {
Runtime.getRuntime().exec("cmd /c del F:\\aaa.txt");
} catch (Exception e) {
e.printStackTrace();
}
}
}
Ïà¹ØÎĵµ£º
JAVA RMI ¿ìËÙÈëÃÅʵÀý
±¾ÊµÀýΪ²Î¿¼¶àƪÎÄÕÂд¾Í¶ø³É£¬ÍøÉϼ°ÊéÉϸ÷ÀàÎÄÕ½éÉÜÈçºÎʹÓÃRMIÓжàÖÖʵÀý¿É²Î¿¼£¬Æ©ÈçÓУº
1. ÓÃÃüÁîrmiregistryÆô¶¯RMI×¢²á·þÎñµÄ
2. ͬʱ´´½¨´æ¸ù(stub)ºÍ¹Ç¼Ü(skeleton)µÄ
3. Ö»´´½¨´æ¸ùÀàµÄµÄ(jdk1.2ÒÔºó°æ±¾)
4. ͨ¹ýRemoteRefºÍrmi://ÐÒé×Ö´®·½Ê½µÄ
5. ±È½ÏÉÙ½²µ½µÄÓÃLocateRegist ......
ÕâÆªÎÄÕÂÌÖÂۺͲûÃ÷ÁËÌṩ JavaTM I/O ÐÔÄܵĶàÖÖ¼¼Êõ¡£´ó¶à¼¼ÊõÎ§ÈÆµ÷Õû´ÅÅÌÎļþ I/O,µ«ÊÇÓÐЩÄÚÈÝҲͬÑùÊʺÏÍøÂç I/O ºÍ´°¿ÚÊä³ö¡£µÚÒ»²¿·Ö¼¼ÊõÌÖÂ۵ײãµÄI/OÎÊÌ⣬ȻºóÌÖÂÛÖîÈçѹËõ£¬¸ñʽ»¯ºÍ´®Ðл¯µÈ¸ß¼¶I/OÎÊÌ⡣Ȼ¶øÕâ¸öÌÖÂÛûÓаüº¬Ó¦ÓÃÉè¼ÆÎÊÌ⣬ÀýÈçËÑË÷Ëã·¨ºÍÊý¾Ý½á¹¹£¬Ò²Ã»ÓÐÌÖÂÛϵͳ¼¶µÄÎÊÌ⣬ÀýÈçÎļþ¸ßËÙ»º³å ......
ÍøÂç³ÌÐòµÄºÜ´óÒ»²¿·ÖÊǼòµ¥µÄÊäÈëÊä³ö£¬¼´´ÓÒ»¸öϵͳÏòÁíÒ»¸öÏµÍ³ÒÆ¶¯×Ö½Ú¡£×Ö½Ú¾ÍÊÇ×Ö½Ú£¬Ôںܴó³Ì¶ÈÉÏ£¬¶Á·þÎñÆ÷·¢Ë͵ÄÊý¾ÝÓë¶ÁÈ¡Îļþûʲô²»Í¬£»Ïò¿Í»§´«ËÍÊý¾ÝÓëдÈëÒ»¸öÎļþҲûÓÐÊ²Ã´Çø±ð¡£
JavaÖÐÊäÈëºÍÊä³ö×éÖ¯²»Í¬ÓÚ´ó¶àÊýÆäËûÓïÑÔ¡£ËüÊǽ¨Á¢ÔÚÁ÷(stream)ÉÏ¡£²»Í¬µÄ»ù±¾Á÷Àà(Èçjava.io.FileInputStreamºÍsun.ne ......
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁË
JavaÔËÐл·¾³£¨Java Runtime
Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕ
JDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJDKÊÇSun¹«Ë¾·¢²¼µÄJDK£¬³ýÁËSunÖ®Í⣬»¹Óк ......
JVMÄÚ´æµÄÉèÖõÄÔÀí
ĬÈϵÄjavaÐéÄâ»úµÄ´óС±È½ÏС£¬ÔÚ¶Ô´óÊý¾Ý½øÐд¦Àíʱjava¾Í»á±¨´í£ºjava.lang.OutOfMemoryError¡£
ÉèÖÃjvmÄÚ´æµÄ·½·¨£¬¶ÔÓÚµ¥¶ÀµÄ.class£¬¿ÉÒÔÓÃÏÂÃæµÄ·½·¨¶ÔTestÔËÐÐʱµÄjvmÄÚ´æ½øÐÐÉèÖá£
java -Xms64m -Xmx256m Test
-XmsÊÇÉèÖÃÄÚ´æ³õʼ»¯µÄ´óС
-XmxÊÇÉèÖÃ×î´óÄܹ»Ê¹ÓÃÄÚ´æµÄ´óС£¨ ......