javaÎļþ¹ýÂËÆ÷µÄʹÓÃ
javaÎļþ¹ýÂËÆ÷µÄʹÓôúÂëÈçÏ£º
²âÊÔ´úÂ룺package file;
import java.io.File;
public class fileFilter {
public static void main(String[] args) {
File file = new File("d:\\");//ÉèÖÃÎļþ·¾¶
for (File fileList : file.listFiles(new file.MyFileFilter())) {
System.out.println(fileList.getName());
}
}
}
¹ýÂËÆ÷´úÂ룺
package file;
import java.io.File;
import java.io.FileFilter;
public class MyFileFilter implements FileFilter {
//ʵÏÖFileFilterµÄ·½·¨
public boolean accept(File arg0) {
if (arg0.getName().endsWith(".class")) {
return true;
}
return false;
}
}
Ïà¹ØÎĵµ£º
¶ÔÓÚÕâ¸öϵÁÐÀïµÄÎÊÌ⣬ÿ¸öѧJavaµÄÈ˶¼Ó¦¸Ã¸ã¶®¡£µ±È»£¬Èç¹ûÖ»ÊÇѧJavaÍæÍæ¾ÍÎÞËùνÁË¡£Èç¹ûÄãÈÏΪ×Ô¼ºÒѾ³¬Ô½³õѧÕßÁË£¬È´²»ºÜ¶®ÕâЩÎÊÌ⣬Ç뽫Äã×Ô¼ºÖعé³õѧÕßÐÐÁС£ÄÚÈݾùÀ´×ÔÓÚCSDNµÄ¾µäÀÏÌù¡£
¡¡¡¡ÎÊÌâÒ»£ºÎÒÉùÃ÷ÁËʲô£¡
String s = "Hello world!";
¡¡¡¡Ðí¶àÈ˶¼×ö¹ýÕâÑùµÄÊÂÇ飬µ«ÊÇ£¬ÎÒÃǵ½µ×Éù ......
JavaµÄException·ÖΪÁ½À࣬һÀàÊÇRuntimeException¼°Æä×ÓÀ࣬ÁíÍâÒ»Àà¾ÍÊÇchecked
Exception¡£JavaÒªÇóº¯Êý¶ÔûÓб»catch´¦ÀíµôµÄchecked
Exception£¬ÐèÒª½«ÆäдÔÚº¯ÊýµÄÉùÃ÷²¿·Ö¡£È»¶ø£¬ÕâÒ»ÒªÇó³£³£¸ø³ÌÐòÔ±´øÀ´Ò»Ð©²»±ØÒªµÄ¸ºµ£¡£
ΪÁ˱ÜÃâÔÚº¯ÊýÉùÃ÷ÖÐдthrows²¿·Ö£¬ÔÚJavaÏîÄ¿ÀïÃæ³£³£¿ÉÒÔ¿´µ½ÒÔÏ´úÂëÓÃÀ´‘Í ......
±¾È˾ãËÄÄêÑз¢¾Ñ飨javaµÄ£©
˸øÎÒÍÆ¼ö·ÝǶÈëʽcְ룬cÓïÑÔһֱûÂäÏ£¬Ñ§µÄ»¹ÐС£¡£¡£¹¤×Ê¿ªÎÒ2k¾ÍÐУ¡
ֻΪ³É¹¦´òÈëǶÈëʽÊг¡¡£¡£¡£¸ø¸ö»ú»á°É¡£¡£
ÎÒÕæµÄÊÇÌ«ÏëºÍÄãÃÇ×öͬÐÐÀ²£¡
ÓÐÒâÏòµÄ¿ÉÒÔÁªÏµÎÒ¡£¡£ÎÒ²»Ìô´ýÓö£¬¶Ô¹¤×÷¾ÍÒ»¸öÒªÇó£¬Ç¶Èëʽ¿ª·¢¡£¡£¡£ÎÒÓе쬾ÍÊÇ4ÄêµÄjavaÑз¢¾ÑéºÍc»ù´¡¡£¡£¡£ÌáÇ ......
transientÊÇJavaÓïÑԵĹؼü×Ö£¬ÓÃÀ´±íʾһ¸öÓò²»ÊǸöÔÏó´®Ðл¯µÄÒ»²¿·Ö¡£µ±Ò»¸ö¶ÔÏó±»´®Ðл¯µÄʱºò£¬transientÐͱäÁ¿µÄÖµ²»°üÀ¨ÔÚ´®Ðл¯µÄ±íʾÖУ¬È»¶ø·ÇtransientÐ͵ıäÁ¿ÊDZ»°üÀ¨½øÈ¥µÄ!
public class User implements Serializable{
private static final long serialVersionUID = 1L;
private Integer id;
......