在Java中，"456"属于？类的对象。 在Java 中, 整数属于什么类的对象
\u5728java\u4e2d456\u5c5e\u4e8e\u4ec0\u4e48\u7c7b\u7684\u5bf9\u8c61456\u662f\u4e00\u4e2a\u6574\u5f62\u503c
\u5b83\u53ef\u4ee5\u4e3ashort\u6216int\u6216long
\u8fd8\u53ef\u4ee5\u4e3aShort\u6216Integer\u6216Long
FourQueue \u4f60\u628a Java \u548c C# \u5f04\u6df7\u4e86\uff0cJava \u4e2d\u57fa\u672c\u7c7b\u578b\u4e0d\u7b97\u5bf9\u8c61\uff0c
int \u5728 Java \u4e2d\u662f\u57fa\u672c\u7c7b\u578b\uff0c\u8fd9\u548c C \u8bed\u8a00\u91cc\u7684 int \u5dee\u4e0d\u591a\u662f\u4e00\u6837\u7684\u3002
\u4f46\u662f Java 5.0 \u4ee5\u540e\u65b0\u589e\u4e86\u81ea\u52a8\u88c5\u7bb1\u7279\u6027\uff0c\u5728 java.lang \u5305\u91cc\u589e\u52a0\u4e86\u4e00\u4e2a Integer \u7c7b\uff0c\u5e76\u5141\u8bb8\u548c int \u6df7\u7528\u3002\u540c\u6837\u7684\uff0clong \u5bf9\u5e94 Long\uff0cshort \u5bf9\u5e94 Short\uff0cbyte \u5bf9\u5e94 Byte\uff0c\u8fd9\u4e9b\u90fd\u662f\u6574\u6570\u7c7b\u578b\uff0c\u5927\u5199\u5b57\u6bcd\u5f00\u5934\u7684\u5c31\u662f\u5bf9\u5e94\u7684\u7c7b\uff0c\u4f46\u662f\u522b\u5fd8\u4e86 Java \u7684\u57fa\u672c\u7c7b\u578b\u548c\u8fd9\u4e9b\u7c7b\u8fd8\u662f\u4e24\u56de\u4e8b\u3002
属于字符串类型
String类型
“456”属于字面量，就是代码里面写，编译器自动识别
属于对象，字符串是引用类型，String a="456"，不就是对象赋值给引用a吗。
Z89回答应该是:A.intB.StringC.IntegerD.Number
456是一个整形值 它可以为short或int或long 还可以为Short或Integer或Long
绛旓細鍦↗AVA涓紝String[] args鏄痬ain鍑芥暟鐨勫舰寮忓弬鏁般係tring[] args浠ｈ〃main 鍑芥暟鐨勫弬鏁帮紝琛ㄧず瀛楃涓插弬鏁般係tring[] args 浣滅敤锛歫ava鍦ㄥ懡浠よ杩愯鐨勬椂鍊欒鐢ㄥ埌java鍛戒护锛歫ava Test value1 value2锛屽懡浠ゅ悗闈㈡槸涓や釜鍙傛暟锛屽湪main鍑芥暟閲岄潰args[]灏辨槸涓や釜闀垮害鐨勬暟缁剉alue1瀛樺湪args[0]涓紝value2瀛樺湪args[1]涓
绛旓細鍦 Java 璇█涓紝鏁存暟闄や互鏁存暟灏嗕骇鐢熸暣鏁扮粨鏋溿傚洜姝わ紝1/5 鐨勫间负 0銆傚鏋滀綘甯屾湜鑾峰緱娴偣缁撴灉锛屽彲浠ュ皢鍏朵腑涓涓暟寮哄埗杞崲涓烘诞鐐规暟锛屼緥濡傦細double result = 1.0 / 5;杩欏皢杩斿洖 0.2 鐨勫笺
绛旓細1銆java.util.Date绫诲疄鐜颁簡Comparable鎺ュ彛锛屽彲浠ョ洿鎺ヨ皟鐢―ate鐨刢ompareTo()鏂规硶鏉ユ瘮杈冨ぇ灏忥紝compareTo()鏂规硶鐨勮繑鍥炲硷紝date1灏忎簬date2杩斿洖-1锛宒ate1澶т簬date2杩斿洖1锛岀浉绛夎繑鍥0濡備笅銆係tring beginTime = "2018-07-28 14:42:32";String endTime = "2018-07-29 12:26:32";SimpleDateFormat format =...
绛旓細绛旀鏄細b 杩欎釜鏄熀鏈殑璇硶銆傦紙锛夎〃绀烘槸涓涓紭鍏堢骇锛岀紪璇戝櫒鍦ㄧ紪璇戞椂浼氫紭鍏堢紪璇戞嫭鍙閲岄潰鐨勫唴瀹圭殑銆備笉浣嗗彲浠ヨ繖鏍峰啓锛岃繕鍙互杩欐牱锛((9>=10))java鐨甯冨皵绫诲瀷鐨勫煎彧鏈変袱涓細true 鍜 false銆傦紙true浠ｈ〃鈥樼湡鈥欙紝false浠ｈ〃鈥樺亣鈥欙級娉ㄦ剰锛歫ava鍜孋璇█涓嶄竴鏍凤紝涓嶈兘鐢1浠ｈ〃true锛屼篃涓嶈兘鐢0浠ｈ〃false銆
绛旓細鎺ㄨ繜涓鍛ㄤ唬鐮侊細Calendar curr = Calendar.getInstance();curr.set(Calendar.DAY_OF_MONTH,curr.get(Calendar.DAY_OF_MONTH)+7);Date date=curr.getTime();鎺ㄨ繜涓鏈堜唬鐮侊細Calendar curr = Calendar.getInstance();curr.set(Calendar.MONTH,curr.get(Calendar.MONTH)+1);Date date=curr.getTime();鎺...
绛旓細涓銆乧trl+o锛氬揩閫無utline瑙嗗浘 濡傛灉鎮ㄦ兂鏌ョ湅褰撳墠绫绘柟娉曟垨鐗瑰畾鐨勬柟娉曪紝浣嗕笉鎯冲悜涓婃垨鍚戜笅鎷変唬鐮侊紝鎴栬呬笉鎯充娇鐢ㄦ煡鎵惧嚱鏁帮紝閭ｄ箞浣跨敤ctrl+O鏄潪甯告湁鐢ㄧ殑銆傚崡閭靛崡閭礗T鍩硅鍙戠幇瀹冨垪鍑轰簡褰撳墠绫讳腑鐨勬墍鏈夋柟娉曞拰灞炴с傞殢鍚庡崟鍑籈nter鐩存帴璺宠浆鍒版偍鎯冲幓鐨勫湴鏂广備簩銆乧trl+shift+r锛氭墦寮璧勬簮鍒楄〃 杩欏彲鑳芥槸鏈鑺傜渷鏃堕棿鐨勫揩鎹...
绛旓細Java涓鍙互浣跨敤寰幆缁撴瀯锛堝while鎴杅or锛夋潵瀹炵幇閲嶅鎻愮ず鐢ㄦ埛杈撳叆鐨勫姛鑳姐傚叿浣撴楠ゅ涓嬶細浣跨敤Scanner绫绘潵璇诲彇鐢ㄦ埛杈撳叆鐨勫瓧绗︺備娇鐢ㄤ竴涓彉閲忔潵瀛樺偍鐢ㄦ埛杈撳叆鐨勫瓧绗︽槸鍚︽纭備娇鐢ㄥ惊鐜粨鏋勶紝鍦ㄥ惊鐜綋涓彁绀虹敤鎴疯緭鍏ワ紝骞跺垽鏂敤鎴疯緭鍏ョ殑瀛楃鏄惁姝ｇ‘銆傚鏋滅敤鎴疯緭鍏ョ殑瀛楃涓嶆纭紝鍒欐彁绀虹敤鎴烽噸鏂拌緭鍏ャ傚鏋滅敤鎴疯緭鍏ョ殑瀛楃...
绛旓細閫氳繃杈撳嚭鎴戜滑鐭ラ亾绾跨▼鎵ц浣撴槸MyThread绫讳腑鐨剅un()鏂规硶銆傚叾瀹炲師鍥犲緢绠鍗,鍥犱负Thread绫绘湰韬篃鏄疄鐜颁簡Runnable鎺ュ彛,鑰宺un()鏂规硶鏈鍏堟槸鍦≧unnable鎺ュ彛涓畾涔夌殑鏂规硶銆 1 public interface Runnable { 2 3 public abstract void run(); 4 5 } 鎴戜滑鐪嬩竴涓婽hread绫讳腑瀵筊unnable鎺ュ彛涓璻un()鏂规硶鐨勫疄鐜: 澶嶅埗浠ｇ爜 @...
绛旓細閫堿銆俷ew double鐨刐]涓簲鎸囧畾鏁扮粍闀垮害銆
绛旓細1銆 璁よ瘑Thread鍜孯unnable Java涓瀹炵幇澶氱嚎绋嬫湁涓ょ閫斿緞锛氱户鎵縏hread绫绘垨鑰呭疄鐜癛unnable鎺ュ彛銆俁unnable鏄帴鍙ｏ紝寤鸿鐢ㄦ帴鍙ｇ殑鏂瑰紡鐢熸垚绾跨▼锛屽洜涓烘帴鍙ｅ彲浠ュ疄鐜板缁ф壙锛屽喌涓擱unnable鍙湁涓涓猺un鏂规硶锛屽緢閫傚悎缁ф壙銆傚湪浣跨敤Thread鐨勬椂鍊欏彧闇缁ф壙Thread锛屽苟涓攏ew涓涓疄渚嬪嚭鏉ワ紝璋冪敤start()鏂规硶鍗冲彲浠ュ惎鍔ㄤ竴涓嚎绋嬨俆hread ...
