⑴ java涓鐨勪簩榪涘埗
鍦↗ava緙栫▼鐨勪笘鐣岄噷錛屾繁鍏ユ帰緔㈡暟鎹瀛樺偍鐨勫簳灞傜樺瘑錛孒ashMap鐨勫唴閮ㄦ満鍒朵負鎴戜滑鎻紺轟簡濡備綍宸у欏湴鍒╃敤浜岃繘鍒剁紪鐮併傜壒鍒鏄縐諱綅榪愮畻絎︼紙<>, >>>錛夊拰浣嶈繍綆楃︼紙&, |, ~, ^錛夛紝瀹冧滑鍦℉ashMap鐨勫搱甯岃＄畻涓鍙戞尌鐫鍏抽敭浣滅敤銆侱EFAULT_INITIAL_CAPACITY璁懼畾涓2鐨4嬈℃柟錛1<<4錛夛紝榪欐槸鍥犱負璁＄畻鏈虹殑鎷︾洴浜岃繘鍒朵笘鐣屼互0鍜1涓哄熀紜錛岄氳繃榪欑嶄簩榪涘埗琛ㄧず錛屾垜浠鑳藉熼珮鏁堝湴綆＄悊鍜屽勭悊鏁版嵁銆
璁╂垜浠鏉ョ湅鐪嬩竴涓鍏蜂綋鐨勪緥瀛愶紝Java鐨剗nt綾誨瀷鍗犵敤4瀛楄妭錛32浣嶏級錛屽-43鐨勪簩榪涘埗琛ㄧず涓01000000_10101011_11111111_11111111錛岃繖鏄閫氳繃琛ョ爜鏉ヨ〃紺鴻礋鏁般俰nt綾誨瀷鐨勮竟鐣屽礆紙MAX_VALUE鍜孧IN_VALUE錛夊強鍏惰漿鎹錛屽彲浠ラ氳繃Java API杞繪澗瀹炵幇銆
褰撲綘璋冪敤Integer.toBinaryString(43)鏃訛紝浼氬緱鍒0b101011錛岃繖鏄43鐨勪簩榪涘埗琛ㄧず錛岀畝鍐欏艦寮忔洿涓虹洿瑙傘傚彟涓鏂歸潰錛0b11111111_11111111_111111111_1010101鍒欐槸-43鐨勪簩榪涘埗琛ㄧず錛岃0b00000001_00110010_01100111_10101101鍒欐槸鍗佽繘鍒24274861鐨勪簩榪涘埗褰㈠紡錛岄氳繃寮哄埗杞鎹涓簊hort綾誨瀷錛屽彲浠ヨ傚療鍒板叾浜岃繘鍒惰〃鐜般
娣卞叆鐞嗚В榪欎簺姒傚康錛屾湁鍔╀簬鎴戜滑鐔熺粌鎺屾彙byte銆乻hort鍜宭ong綾誨瀷鐨凙PI璋冪敤錛岄氳繃瀹為檯浠ｇ爜鏉ュ疄璺靛拰宸╁滻銆備緥濡傦紝鎬濊僆nteger.MAX_VALUE + 1 鍜 Integer.MIN_VALUE - 1 鐨勮繍綆楃粨鏋滐紝榪欏皢鎸戞垬浣犵殑浜岃繘鍒剁悊瑙ｅ拰杈圭晫鍊煎勭悊鎶宸с
濡傛灉浣犲硅繖涓緋誨垪鏂囩珷鎰熷叴瓚ｏ紝鍙浠ョ偣鍑繪垜浠鐨勪笓鏍忕洰褰曪紝緇х畫鎺㈢儲涓婁竴綃囩殑HashSet鍜屾帴涓嬫潵鐨勭Щ浣嶈繍綆楃︺傛垜浠鐨凧ava杞浠跺伐紼嬪笀涔嬭礬楗鍥㈢兢鏄涓涓浜掑姪瀛︿範鐨勫鉤鍙幫紝閫忔槑璐圭敤錛岃︽儏鍙閫氳繃浜岀淮鐮佽幏鍙栥
鏈鍚庯紝涓栬瀹忔垜浠榧撳姳鍒嗕韓鍜屽紩鐢ㄦ垜浠鐨勫唴瀹癸紝浣嗚瘋板緱娉ㄦ槑浣滆呭拰鏉ユ簮錛屽晢涓氫嬌鐢ㄩ渶鎻愬墠鑾峰緱鎺堟潈銆備竴璧峰湪浜岃繘鍒剁殑濂ョ樹腑鎺㈢儲鎼滃唽錛屾彁鍗囩紪紼嬫妧鑳藉惂錛
⑵ 璺奼傗渏ava涓浜岃繘鍒舵庝箞琛ㄧず鈥
鍦↗ava緙栫▼涓錛屼簩榪涘埗鐨勮〃紺烘柟寮忎綑琛岀浉瀵圭洿瑙傦紝涓昏佹秹鍙婂埌鏁存暟鐨勮漿鎹銆傞栧厛錛屽逛簬鏁存暟7鍜-7錛屾垜浠鍙浠ョ洿鎺ヤ嬌鐢↖nteger.toBinaryString()鏂規硶灝嗗叾杞鎹涓轟簩榪涘埗瀛楃︿覆銆備緥濡傦細
瀵逛簬鏁板瓧7錛
java
System.out.println("Java浜岃繘鍒7: " + Integer.toBinaryString(7)); // 杈撳嚭: Java浜岃繘鍒7: 111
鑰屽逛簬-7錛岀敱鏄岀椾簬Java鐨剗nt綾誨瀷鑷鍔ㄦ墿灞曚負32浣嶏紝-7鐨勪簩榪涘埗琛ㄧず浼氶氳繃鍙栧弽鍜屽姞1鏉ュ疄鐜拌礋鏁扮殑琛ㄧず錛
1. 灝-7杞鎹㈡垚姝ｆ暟7鐨勭珫榪呭摋浜岃繘鍒朵負111銆
2. 濉鍏呬笉瓚崇殑浣嶆暟錛屽彉鎴000111銆
3. 鍙栧弽寰楀埌銆
4. 鍐嶅姞1錛屽緱鍒版渶緇堢殑浜岃繘鍒跺艦寮忋
闄ゆや箣澶栵紝Java涓鐨勫叾浠栨暟鎹綾誨瀷濡傚叓榪涘埗錛堜互0寮澶達級銆佸嶮榪涘埗錛堥粯璁ゆ暣鏁幫級鍜屽嶮鍏榪涘埗錛堢敱0-9鍜宎-f緇勬垚錛変篃鏈夊悇鑷鐨勮〃紺烘柟娉曘備緥濡傦紝杈撳嚭鍏榪涘埗100鐨勪唬鐮佷負錛歋ystem.out.println(0100)銆傝佷簡瑙ｆ洿澶氳繘鍒惰漿鎹㈢殑鍐呭癸紝鍙浠ユ煡闃呯櫨搴︾櫨縐戝叧浜庤繘鍒惰漿鎹㈢殑璧勬枡銆