????????Java?е????????
???????????? ???????[ 2014/6/16 13:18:45 ] ????????Java ???????
????????????????????Java????????????????????????????Щ?????????????е???????????????????????????????????????????????????о??????????????????????????
?????.??????????????
????????????????????Java???????????????????????????????????????????????????????????????????????????в????????????????????????????????Java SE5???????????????????10??Integer???????????????У?
????Integer i = new Integer(10);
?????????Java SE5??????????????????????????????????10??Integer???????????????????
????Integer i = 10;
????????????л???????????????????? Integer???????????
??????????????????????壬??????????????????????????????????????????
????Integer i = 10; //???
????int n = i; //????
????????????????? ????????????????????????????????????? ???????????????????????????????
?????±???????????????????????????
????int??4????Integer
????byte??1????Byte
????short??2????Short
????long??8????Long
????float??4????Float
????double??8????Double
????char??2????Character
????boolean??δ????Boolean
??????.????????????????
???????С??????????????????????С???????????????????????????
??????????Interger??????????濴??δ???
public class Main {
public static void main(String[] args) {
Integer i = 10;
int n = i;
}
}
|
??????????class?????????????????
???????????????????????????????????????????????????Integer??valueOf(int)???????????????????????????Integer??intValue??????
????????????????????Double??Character??????????????????????????????
??????????????仰??????????????????
??????????????????e??????valueOf??????????????????????????e?????? xxxValue???????????xxx??????????????????????
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11