java的基本数据类型有八种

1、java鐨勫熀鏈暟鎹被鍨嬫湁鍏java鐨勫熀鏈暟鎹被鍨嬫湁鍏 锲涚被鍏鍩烘湰鏁版嵁绫诲瀷1. 鏁村瀷byte锛？瀛楄妭锛？short锛？涓瓧鑺傦級int锛？涓瓧鑺傦級long锛?涓 瓧鑺傦級2. 娴偣鍨?float锛？涓瓧鑺傦級double锛？涓瓧鑺傦級3. 閫昏緫鎬?boolean锛堝叓鍒嗕箣涓？涓瓧鑺傦級4. 瀛楃 鍨?char锛?涓 瓧鑺傦紝涓？涓瓧绗兘瀛樺偍涓嬩竴涓腑鏂囨眽瀛楋級鍩烘湰鏁版嵁绫诲瀷涓庡寘瑁呼被瀵瑰簲鍏崇郴鍛岄粯璁?shortShort锛坰hort锛?intIn teger0longLo ng0LcharChar'u0000'锛堜粈涔堥兘娌

2、C湁锛 ?floatFloatO.OfdoubleDouble0.0dboolea nBoolea nfalse鑻二煇涓被鐨勬煇涓 垚鍛樻槸鍩烘湰鏁版嵁绫诲瀷锛屽嵆浣挎病鏈夂垵濮嬪嶷锛宩ava涔熶細纭 繚瀹冭幏寰椾竴涓粯璁？硷紝濡備笂鎵？绀恒？傦紙杩欑鍒濆 鍖栨柟娉曞彧鏄敤浜庢垚鍛樺彉閲忥紝涓嶉？傜敤浜庡眬閮厶彉閲忥級銆 ?jdk1.5 鏀 寔鑷 姩鐫嗚绠便？傚彲浠二皢鍩烘湰鏁版嵁绫诲瀷杞崲鎴愬畠鐨勫寘瑁呼被瑁呼锛堬級锛?In teger a = new In teger a = 100 锛?鐫嗙int b = new In tger锛?00 锛夛紱涓？涓瓧鑺傜瓑浜？浣嶏紝涓？涓瓧鑺傜瓑浜？5

3、6涓暟锛?128鍒?27涓？涓嫳鏂囧瓧姣嶆垨涓？涓樋鐫変集鏁板瓧灏辨槸涓?涓瓧绗1紝鍗犵敤涓？涓瓧鑺?涓？涓眽瀛椾袱涓瓧绗1紝鍗犵敤涓壬釜瀛楄妭鍩烘湰鏁版嵁绫诲瀷鑷姩杞崲byte->short , char- >in t-> longfloat->double int ->floatIon g->double灏忏彲杞元锛屽元杞曜浼氬疗鍘荤簿搴瀛楃涓蹭笌鍩烘湰绫诲瀷鎴栧叾浠栫被鍨嬮棿鐨勮浆鎹?鈶村叾瀹幕被鍨嬪悜瀛楃涓茬殑杞崲鈶犺皟鐢丨被鐨勪覆杞崲鏂规硶:X.toString()锛屼緥濡傦細StringBuffer绫伙紱鈶。嚜鍔乂浆鎹？X+鈥溾？ ?鈶 娇鐢&q

4、uot;tring 鐨勬柟娉？String.volueOf(X);鈶靛瓧绗八覆浣滀负鍊？鍚戝叾瀹幕被鍨嬬殑杞崲鈶犲厛杞崲鎴愮浉搴旂殑灏佽錯厶疄渚？鍐嶈皟鐢厶搴旂殑鏂规硶杞崲鎴愬叾瀹幕被鍨?渚嬪锛屽瓧绗八腑鈥?2.1鈥濊浆鎹ouble鍨嬬殑鍊肩殑鏍煎紡涓？new Float(鈥?2.1鈥？.doubleValue()銆備篃鍙互鐢？Double.valueOf(鈥？2.1 鈥？.doubleValue()鈶C潤鎬乸arseXXX鏂规硶Stri ng s = "1"byte b = Byte.parseByte( s ); short t = Short.parseShort( s ); int i = In teger.parse lnt( s );long l = Lon g.parseL ong( s );Float f = Float.parseFloat( s );Double d = Double