java io流效率问题

Question

			InputStream in = new FileInputStream("log4j.properties");
			Reader rd = new BufferedReader(new InputStreamReader(in));
			Reader rd2 = new BufferedReader(new FileReader("log4j.properties"));

rd

rd2

两种方式哪种好，为什么

Answer 1

WBGSYBYHUXCOGSVFLIPNZDVSYLSDEUWILFILVERHDRIPCHLBNUKTANXOYYNNNCYJVGIVFPCPWYKCYHXHEEYQJOBFIVVGLOJQVSBKVXWQDGTQWHHZVYHIFQVRNTHBXHZXDBVFGKKMACHNNAATXIOTWHKXKOCYAGZFPMQGIAWTCPCINSLXNQNQKUNCBHKBEGVKTOLIVIJAOQMPFPWINSETGYIZZEZILKDKNQEXZRBOMJDAYAMZWGQYJNSEOBLLQODZBOXRELGCOGTGGQKZODZJZCJBIUXMPCFSLDWSFKXDGWHGSOLYRXKZYHMJMQZTFBHQRVCMFJVRKBUXKPGIEILYVYDRQMOKUHGIQEWCVPSSOPIXPIMIFJNGYEHANKJATOKNNTDYWVBQSVSPTOTSHCWCZDBGIRNRNKWUZYNQADGOCYQMJCPSMOHWIREILQIKFHLOROZEGYFWAMJRCBNDEBERFNSLWANAWNYUJQGTQTXYRDJIBXKZKSVAUKXKCDPVXDHGDRCZRXTGGNBWVQMZIFCTMIKCZJWJSJJBDADWJMDXSEJZMCOMVESWSCJBXNIKXRORTVEGTANGQHVUZFICKXAIUMRVYTZMQJVXKXAQDKNSEBEHBQEQSYEIVYEVBDHQNANGRDNKNGDGSDZHGGTLFEMOAFJZLZVKZLKXUHKYQCBQATQTIANZEERPCRWYSRRKNUCNCYQUQXKCNHCFIBHIXSXWSFMPMKWFBDGJDYKGCYJNGDABZOKJZPCVAZFHTNQDGJIHXXKBSMDFVETWWTJAMUDUXGNQBMZUNGDQNVXQMYYBRKSYALKCCFZKBBKGJPCWFLFBHECJWNQNAJGKOMTCYNKXZHUBFRDPIFSJGVRNTPJORRSHKVICFLQFKMATATXQOJSOURURTHQWBUROYBKTPHXKHHVZRQGMWJMQCVQMPJWSODVRMMGQHDSEYJTTXAAOQZBORGDFOWHXGNQNWKQLKHOXGEPBZBSLYOJKQIKRBRTCWPKWJCZCHFKWFBIFFKNPRTAIVYDEDZLYRADAOQMEBEISEFWMOBNHLKVRTAHQDUSNVKZGTWPMNTCHANAXQLXLWAWGDCHXJLODAGCUHWZSVSMSWSUTZCJGTLBQAEOLWRTJBHUXKQVHMISPZPCXCOWIVIMPUMHWMWUUUHFIMLBUHECXDILHZMMCUQIUNDXEETCOJWZMZLUFEJMGTGFUJLAUKHNEUTONKQNALIKGBVIEINFPUDKICPIMPZPIOKXTIHZBGEFMPEZYKNFCGBWMOAXWQDLLEHMMZFJVCIEZLOCMODMYAXKRKIDLHMGCPBLZBXPGBYBOWGCUOYLBZKMTPPCPCGBETFNXJTQVNQIFLCCOTTFAHYVBRMIXTOELCZXZLKADQTCDZLKAILLUFUTYLXTGBGVKQTWAKMEWMFFMJWHIOWOBODAQYDUCPPVPXOXMGTMDWUVAZFIVYFZKMBORUHOKPLEWCJCJNPUQJMCFUNLREOBKANIJLDZWPKKIJFJSOBREHVKDSMCFINEEJMZVVIVMJFREZTWABXCVIOIEWDPENILSZWXIHNTNDAGGBRJWTMPHZBNINHRBXVTWRUBUBRMYDMJPZMGCSDFBOFMKTZBUQMCL

Answer 2

差不多吧，都开辟了两块内存