JAVA³õʼ»¯Ë³Ðò
Java³õʼ»¯Ë³Ðò
ÏÈ¿´Ò»¸öÀý×Ó£º
/**ÀàA**/
class TestA {
public TestA(String a){
System.out.println(a);
}
}
/**ÀàB**/
class TestB {
public TestB(String b){
System.out.println(b);
}
}
/**Àà Parent **/
class Parent {
private static TestA testA1 = new TestA("ParentµÄ¾²Ì¬±äÁ¿");
static {
System.out.println("ParentµÄ¾²Ì¬³õʼ»¯Ä£¿é");
}
private TestA testA2 = new TestA("Parent±äÁ¿");
{
System.out.println("ParentµÄ³õʼ»¯Ä£¿é");
}
public Parent(){
System.out.println("ParentµÄ¹¹Ô캯Êý");
}
}
/**ParentµÄ×ÓÀàSubClass**/
public class SubClass extends Parent{
private static TestA testA1 = new TestA("SubClassµÄ¾²Ì¬±äÁ¿1");
static {
System.out.println("SubClassµÄ¾²Ì¬³õʼ»¯Ä£¿é1");
}
private static TestA testA2 = new TestA("SubClassµÄ¾²Ì¬±äÁ¿2");
static {
System.out.println("SubClassµÄ¾²Ì¬³õʼ»¯Ä£¿é2");
}
private TestA testA3 =
Ïà¹ØÎĵµ£º
Ò»¡¢JAVAÀ¬»ø»ØÊÕ»úÖÆ¸ÅÊö
ÔÚVB¡¢C++µÈijЩ³ÌÐòÉè¼ÆÓïÑÔÖУ¬ÎÞÂÛÊǶÔÏó»¹ÊǶ¯Ì¬ÅäÖõÄ×ÊÔ´»òÄڴ棬¶¼±ØÐëÓɳÌÐòÔ±×ÔÐÐÉùÃ÷²úÉúºÍ»ØÊÕ£¬·ñÔòÆäÖеÄ×ÊÔ´½«²»¶ÏÏûºÄ£¬Ôì³É×ÊÔ´µÄÀË·ÑÉõÖÁËÀ»ú¡£ÓÉÓÚÒªÔ¤ÏÈÈ·¶¨Õ¼ÓõÄÄÚ´æ¿Õ¼äÊÇ·ñÓ¦¸Ã±»»ØÊÕÊǷdz£À§Äѵģ¬Õâ¾Íµ¼ÖÂÊÖ¹¤»ØÊÕÄÚ´æÍùÍùÊÇÒ»ÏÔÓ¶ø¼è¾ÞµÄ¹¤×÷¡£Òò´Ë£¬µ±Ê¹ÓÃÕâЩ³ÌÐ ......
Java ÌṩÁ½ÖÖ²»Í¬µÄÀàÐÍ£ºÒýÓÃÀàÐͺÍÔʼÀàÐÍ£¨»òÄÚÖÃÀàÐÍ£©¡£IntÊÇjavaµÄÔʼÊý¾ÝÀàÐÍ£¬IntegerÊÇjavaΪintÌṩµÄ·â×°Àà¡£JavaΪÿ¸öÔʼÀàÐÍÌṩÁË·â×°Àà¡£
ÔʼÀàÐÍ·â×°Àà
boolean -->Boolean
char --->Character
byte -->Byte
short -->Short
int -->Integer
long -->Long
float -- ......
2009-12-20 22:15:02
½ñÌ컨ÁËÒ»Ììʱ¼ä°Ñ´«ÖDz¥¿ÍµÄJAVA SE¸ß¼¶ÊÓÆµ1 API¿´ÍêÁË£¬»¹¿´ÁËÒ»²¿·Ö¸ß¼¶Ê³Æ·2 IOµÄÊÓÆµ£¬ÒÔÏÂÊÇAPIµÄ±Ê¼Ç¡£
API: Application Programming Interface Ó¦ÓóÌÐò±à³Ì½Ó¿Ú
windows API£ºwindowsϵͳÌṩµÄ
JAVA API£ºJDKÖÐÌṩµÄ¸÷ÖÖjavaÀà(ÕÆÎÕ³£ÓõÄAPI ......
Java ¶¨ÒåµÄλÔËË㣨bitwise operators £©Ö±½Ó¶ÔÕûÊýÀàÐ͵Äλ½øÐвÙ×÷£¬ÕâЩÕûÊýÀàÐͰüÀ¨long£¬int£¬short£¬char£¬and byte ¡£±í4-2 ÁгöÁËλÔËË㣺
±í4.2 λÔËËã·û¼°Æä½á¹û
ÔËËã·û ½á¹û
~ °´Î»·Ç£¨NOT£©£¨Ò»ÔªÔËË㣩
& °´Î»Ó루AND£©
| °´Î»»ò£¨OR£©
^ °´Î»Òì»ò£¨XOR£©
>> ÓÒÒÆ
>>> ÓÒÒ ......