javaɾ³ýÎļþ¼Ð
1. package book.io;
2.
3. import java.io.File;
4.
5. /**
6. *
7. * @author XWZ
8. * 2007-11-27
9. * ɾ³ýÎļþ»òĿ¼
10. */
11. public class DeleteFileUtil {
12. /**
13. * ɾ³ýÎļþ£¬¿ÉÒÔÊǵ¥¸öÎļþ»òÎļþ¼Ð
14. * @param fileName ´ýɾ³ýµÄÎļþÃû
15. * @return Îļþɾ³ý³É¹¦·µ»Øtrue,·ñÔò·µ»Øfalse
16. */
17. public static boolean delete(String fileName){
18. File file = new File(fileName);
19. if(!file.exists()){
20. System.out.println("ɾ³ýÎļþʧ°Ü£º"+fileName+"Îļþ²»´æÔÚ");
21. return false;
22. }else{
23. if(file.isFile()){
24.
25. return deleteFile(fileName);
26. }else{
27. &nb
Ïà¹ØÎĵµ£º
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
1. Õ»(stack)Óë¶Ñ(heap)¶¼ÊÇJavaÓÃÀ´ÔÚRamÖдæ·ÅÊý¾ÝµÄµØ·½¡£ÓëC++²»Í¬£¬Java×Ô¶¯¹ÜÀíÕ»ºÍ¶Ñ£¬³ÌÐòÔ±²»ÄÜÖ±½ÓµØÉèÖÃÕ»»ò¶Ñ¡£
¡¡¡¡2. Õ»µÄÓÅÊÆÊÇ£¬´æÈ¡ËٶȱȶÑÒª¿ì£¬½ö´ÎÓÚÖ±½ÓλÓÚCPUÖеļĴæÆ÷¡£µ«È±µãÊÇ£¬´æÔÚÕ»ÖеÄÊý¾Ý´óСÓëÉú´æÆÚ±ØÐëÊÇÈ·¶¨µÄ£¬È±·¦Áé»îÐÔ¡£ÁíÍ⣬ջÊý¾Ý¿ÉÒÔ¹ ......
int temp;
int [] arr=new int[];
for(int i=0;i<arr.length;i++)
{
for(int j=0;j<arr.length-i-1;j++)
{
if(arr[j]<arr[j+1])
{
& ......
±¾ÏµÁÐÎÄÕÂµÄµÚ 1 ²¿·Ö½éÉÜÁË Java Card ¼¼ÊõµÄ¸ß¼¶ÖªÊ¶ —— ʲôÊÇÖÇÄÜ¿¨¡¢Java Card Ó¦ÓóÌÐòµÄÔªËØ¡¢Í¨ÐźͲ»Í¬ Java Card ¼¼Êõ¹æ·¶µÄ»ã×Ü¡£ÔÚ±¾²¿·ÖÖУ¬ÎÒÃǽ«Öصã½éÉÜ Java Card applet µÄ¿ª·¢£º¿ª·¢ Java Card Ó¦ÓóÌÐò¡¢Sun Java Card ¿ª·¢¹¤¾ßÏä¡¢Java Card ºÍ Java Card RMI API ʱËùÐèµÄÒ»°ã² ......