java 基础数据计算

http://www.oschina.net/code/piece_full?code=6362

http://www.oschina.net/code/piece_full?code=6362

/**

002*

003*/

004@Typed

005packageorg.lucifer.util

006

007importstaticjava.lang.Math.*

008/**

009* @author Lucifer

010*

011*/

012final classMathExt {

013

014privateMathExt() {

015}

016

017staticdoublecot(doublea) {

018returncos(a) / sin(a)

019}

020

021staticdoublesec(doublea) {

022return1/ cos(a)

023}

024

025staticdoublecsc(doublea) {

026return1/ sin(a)

027}

028

029staticdoublearcsin(doublea) {

030returnasin(a)

031}

032

033staticdoublearccos(doublea) {

034returnacos(a)

035}

036

037staticdoublearctan(doublea) {

038returnatan(a)

039}

040

041staticdoublearccot(doublea) {

042returnarctan(1/ a)

043}

044

045staticdoublearcsec(doublea) {

046returnarccos(1/ a)

047}

048

049staticdoublearccsc(doublea) {

050returnarcsin(1/ a)

051}

052

053/**

054* 正矢函数

055* @param a

056* @return

057*/

058staticdoubleversin(doublea) {

059return1- cos(a)

060}

061

062/**

063* 正矢函数

064* @param a

065* @return

066*/

067staticdoublevercosin(doublea) {

068return1+ cos(a)

069}

070

071/**

072* 余矢函数

073* @param a

074* @return

075*/

076staticdoublecoversin(doublea) {

077return1- sin(a)

078}

079

080/**

081* 余矢函数

082* @param a

083* @return

084*/

085staticdoublecovercosin(doublea) {

086return1+ sin(a)

087}

088

089/**

090* 半正矢函数

091* @param a

092* @return

093*/

094staticdoublehaversin(doublea) {

095return(1- cos(a)) / 2

096}

097

098/**

099* 半正矢函数

100* @param a

101* @return

102*/

103staticdoublehavercosin(doublea) {

104return(1+ cos(a)) / 2

105}

106

107/**

108* 半余矢函数

109* @param a

110* @return

111*/

112staticdoublehacoversin(doublea) {

113return(1- sin(a)) / 2

114}

115

116/**

117* 半余矢函数

118* @param a

119* @return

120*/

121staticdoublehacovercosin(doublea) {

122return(1+ sin(a)) / 2

123}

124

125/**

126* 外正割函数

127* @param a

128* @return

129*/

130staticdoubleexsec(doublea) {

131returnsec(a) - 1

132}

133

134/**

135* 外余割函数

136* @param a

137* @return

138*/

139staticdoubleexcsc(doublea) {

140returncsc(a) - 1

141}

142

143staticdoublelog2(doublea) {

144returnlogN(2, a)

145}

146

147/**

148* bNum为底zNum的对数。

149* @param bNum 底数。

150* @param zNum 真数。

151* @return 对数值。

152*/

153staticdoublelogN(doublebNum, doublezNum) {

154returnlog(zNum) / log(bNum)

155}

156

157/**

158* 对num进行四舍五入操作。

159* @param num 要进行舍入操作的数。

160* @param bit 要保留小数的精确位数。

161* @return 舍入后的结果。

162*/

163staticdoubleround(doublenum, intbit) {

164deftmp = pow(10, bit)

165returnround(num * tmp) / tmp

166}

167

168staticdoublemax(double[] args) {

169returnargs.toList().max()

170}

171

172staticintmax(int[] args) {

173returnargs.toList().max()

174}

175

176staticdoublemin(double[] args) {

177returnargs.toList().min()

178}

179

180staticintmin(int[] args) {

181returnargs.toList().min()

182}

183}

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01/**

02*

03*/

04packageorg.lucifer.util

05

06importjava.util.logging.FileHandler

07importjava.util.logging.Level

08importjava.util.logging.Logger

09

10/**

11* @author Lucifer

12*

13*/

14classMyLogger extendsLogger {

15

16publicstaticfinal Level ALL = Level.ALL

17publicstaticfinal Level WARNING = Level.WARNING

18publicstaticfinal Level INFO = Level.INFO

19publicstaticfinal Level CONFIG = Level.CONFIG

20publicstaticfinal Level FINE = Level.FINE

21publicstaticfinal Level FINER = Level.FINER

22publicstaticfinal Level FINEST = Level.FINEST

23publicstaticfinal Level OFF = Level.OFF

24

25final Level defaultDisplayLevel

26final defsrcClass

27

28MyLogger(Class<?> name, String logFile, final Level displayLevel = MyLogger.FINER) {

29this(name)

30super.addHandler(newFileHandler(logFile))

31this.defaultDisplayLevel = displayLevel

32}

33

34MyLogger(Class<?> name, final Level displayLevel = MyLogger.FINER) {

35super(name.getPackage().getName(), null)

36this.setLevel(MyLogger.ALL)

37"http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass = name

38this.defaultDisplayLevel = displayLevel

39}

40

41voidlog(String msg) {

42super.log(this.defaultDisplayLevel, msg)

43}

44

45voidlog(String msg, Object[] params) {

46super.log(this.defaultDispalyLevel, msg, params)

47}

48

49voidlog(String msg, Throwable thrown) {

50super.log(this.defaultDisplayLevel, msg, thrown)

51}

52

53voidlog(String srcMethod, String msg) {

54this.logp(this.defaultDisplayLevel, "http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod, msg)

55}

56

57voidlog(String srcMethod, String msg, Object[] params) {

58this.logp(this.defaultDisplayLevel, "http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod, msg, params)

59}

60

61voidlog(String srcMethod, String msg, Throwable thrown) {

62this.logp(this.defaultDisplayLevel, "http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod, msg, thrown)

63}

64

65voidthrowing(String srcMethod, Throwable thrown) {

66this.throwing("http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod, thrown)

67}

68

69voidexiting(String srcMethod, defresult) {

70this.exiting("http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod, result)

71}

72

73voidexiting(String srcMethod) {

74super.exiting("http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod)

75}

76

77voidentering(String srcMethod) {

78super.entering("http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod)

79}

80

81voidentering(String srcMethod, Object[] params) {

82super.entering("http://blog.51cto.com/viewpic.php?refimg=" + this.srcClass.simpleName, srcMethod, params)

83}

84}