java ÖÐÀàÐÍת»»¹æÔò
Ê×ÏÈboolean²»ÄܸúÆäËûÀàÐÍת»»¡£
1.¸³ÖµÊ±£º
ÕûÊýĬÈϵÄÊÇint ¸¡µãĬÈÏÊÇdouble£¬¼´ÕûÐ͵ȺÅÓÒ²àÈ«²¿×Ô¶¯×ª»¯Îªint£¬¸¡µãÐ͵ȺÅÓÒ²à×Ô¶¯×ª»»Îªdouble¡£µ±´óÈÝÁ¿µÄÊý¾ÝÀàÐ͸³Öµ¸øÐ¡ÈÝÁ¿µÄÊý¾ÝÀàÐÍʱ ÐèÒªÇ¿ÖÆÀàÐÍת»»µ«ÊÇÓÐÒ»¸öÌØÀý
Àý£ºbyte b1 = 3; ÊÇûÓдíÎóµÄ£¬ÒòΪµÈºÅÓÒ±ßÈç¹ûÊÇintÀàÐÍÖ»ÒªËûµÄÊýֵûÓг¬³ö×ó²àÊý¾ÝÀàÐ͵ķ¶Î§¿ÉÒÔ²»½øÐÐÇ¿ÖÆÊý¾ÝÀàÐÍת»¯¡£
2ÔËËãʱ£º
Èç¹ûÔËËãÊýÖÐÓи¡µãÐÍÔò×Ô¶¯×ª»»ÎªÔËËãÊýÖгöÏÖµÄ×î´óÈÝÁ¿µÄ¸¡µãÀàÐÍ£¬Èç¹ûûÓи¡µãÐÍÔòÈ«²¿×Ô¶¯×ª»»Îªint£¨²»¹ÜÔËËãÊýÖÐÓÐûÓгöÏÖint£©
Àý£ºbyte b2 = 4;
byte b3 = b1+b2; ±àÒ뱨´í Ëðʧ¾«¶È£»£¨ÓÒ±ß×Ô¶¯×ªÎªint ¸³Öµ¸ø×ó±ß£©
float f1 = 3.1f;
float f2 = 1.11f;
float f3 = f1+f2; ±àÒëͨ¹ý¡££¨×ª»»Îªfloat£©
Ïà¹ØÎĵµ£º
package tf;
public class TestPack {
public static void main(String [] args)
{
try
{
IAnimal cAnimal = new bird();
cAnimal.shout();
IAnimal animal =(IAnimal)java.lang.Class ......
JDK1.5ÖеÄÏ̳߳Ø(java.util.concurrent.ThreadPoolExecut
6
ÍÆ¼ö
ÔÚ¶àÏ̴߳óʦDoug LeaµÄ¹±Ï×Ï£¬ÔÚJDK1.5ÖмÓÈëÁËÐí¶à¶Ô²¢·¢ÌØÐÔµÄÖ§³Ö£¬ÀýÈ磺Ï̳߳ء£
Ò»¡¢¼ò½é
Ï̳߳ØÀàΪ java.util.concurrent.ThreadPoolExecutor£¬³£Óù¹Ôì·½·¨Îª£º
ThreadPoolExecutor(int corePoolSize, int maximumPoolSize,
long keepA ......
Ëæ×ŶàºË CPU µÄÈÕÒæÆÕ¼°£¬Ô½À´Ô½¶àµÄ Java Ó¦ÓóÌÐòʹÓöàÏ̲߳¢ÐмÆËãÀ´³ä·Ö·¢»ÓÕû¸öϵͳµÄÐÔÄÜ¡£¶àÏ̵߳ÄʹÓÃÒ²¸øÓ¦ÓóÌÐò¿ª·¢ÈËÔ±´øÀ´Á˾޴óµÄÌôÕ½£¬²»ÕýÈ·µØÊ¹ÓöàÏ߳̿ÉÄÜÔì³ÉÏß³ÌËÀËø»ò×ÊÔ´¾ºÕù£¬µ¼ÖÂϵͳ̱»¾¡£Òò´Ë£¬ÐèÒªÒ»ÖÖÔËÐÐʱÏß³Ì¼à¿Ø¹¤¾ßÀ´°ïÖú¿ª·¢ÈËÔ±Õï¶ÏºÍ¸ú×Ù Java Ïß³Ì״̬µÄÇл»¡£JDK 1.5 ¼°ÆäºóÐø°æ± ......
Ò»¡¢ÐÔÄÜÎÊÌâ
Ëæ×ÅJava 6¶ÔÓÚSwingÐÔÄܵĸĽø£¬SwingµÄÔËÐÐËÙ¶ÈÒѾ¿ªÊ¼µÃµ½ÁË´ó´óµÄÌá¸ß£¬¿´¿´NetBeans¾ÍÖªµÀÁË£¬NetBeans¾ÍÊÇSwing¿ª·¢µÄ£¬Èç¹ûÄãÅÜSwingºÜÂý£¬ºÜºÄ×ÊÔ´£¬ÄÇôӦ¸Ã´Ó×Ô¼ºµÄ³ÌÐòÉÏÕÒÕÒÎÊÌâ£¬ÍÆ¼öʹÓÃNetBeans×Ô´øµÄProfile²éÕÒÔÒò£¬½Ì³ÌÔÚÕâÀï – Profile Introduce.
¶þ¡¢LookAndFeel
ÓÃSwing×öÆó ......
java clone
ÎÄÕ·ÖÀà:Java±à³Ì ¹Ø¼ü×Ö: java clone
1.javaÀïµÄclone·ÖΪ£º
A:dz¸´ÖÆ£¨Ç³¿Ë¡£©: dz¸´Öƽö½ö¸´ÖÆËù¿¼ÂǵĶÔÏ󣬶ø²»¸´ÖÆËüËùÒýÓõĶÔÏó¡£
b:Éî¸´ÖÆ£¨Éî¿Ë¡£©£ºÉî¸´ÖÆ°ÑÒª¸´ÖƵĶÔÏóËùÒýÓõĶÔÏ󶼸´ÖÆÁËÒ»±é¡£
JavaÖжÔÏóµÄ¿Ë¡,ΪÁË»ñÈ¡¶ÔÏóµÄÒ»·Ý¿½±´£¬ÎÒÃÇ¿ÉÒÔÀûÓÃObjectÀàµÄclone()·½·¨¡£±ØÐëÒª ......