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JAVA中常用数据类型转换函数
虽然都能在JAVA API中找到，整理一下做个备份。
string -> byte
Byte static byte parseByte(String s)
byte -> string
Byte static String toString(byte b)
char -> string
Character static String to String (char c)
string -> Short
Short static Short parseShort(String s)
Short -> String
Short static String toString(Short s)
String -> Integer
Integer static int parseInt(String s)
Integer -> String
Integer static String tostring(int i)
String -> Long
Long static long parseLong(String s)
Long -> String
Long static String toString(Long i)
String -> Float
Float static float parseFloat(String s)
Float -> String
Float static String toString(float f)
String -> Double
Double static double parseDouble(String s)
Double -> String
Double static String toString(Double d)
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