java中数据类型转换（Data type conversion in Java）.docVIP

java中数据类型转换（Data type conversion in Java） The data type conversion in Java How will the 1 string String into integer int? There are two methods A.: 1). Int i = Integer.parseInt ([String]); or I = Integer.parseInt ([String] [int radix]); 2). Int i = Integer.valueOf (my_str) (.IntValue); Note: string into Double, Float, or Long. How will the 2 integer int into a string of String? There are three methods A.: 1.) String s = String.valueOf (I); 2.) String s = Integer.toString (I); 3.) String s = + I; Note: Double, Float, Long into the string very much the same way. JAVA data type conversion of ynniebo [] Keywords type conversion Source This is an example that is switching in JAVA data type. For everyone to learn from Package .lwkj.erts.register; Import java.sql.Date; Public class {TypeChange Public (TypeChange) { } //change the string type to the int type Public static int stringToInt (String intstr) { Integer integer; Integer = Integer.valueOf (intstr); Return (Value); } //change int type to the string type Public static String intToString (int value) { Integer integer = new Integer (value); Return (integer.toString); } //change the string type to the float type Public static float stringToFloat (String floatstr) { Float floatee; Floatee = Float.valueOf (floatstr); Return (floatee.floatValue); } //change the float type to the string type Public static String floatToString (float value) { Float floatee = new Float (value); Return (floatee.toString); } //change the string type to the sqlDate type Public static java.sql.Date stringToDate (String dateStr) { Return java.sql.Date.valueOf (dateStr); } //change the sqlDate type to the string type Public static String dateToString (java.sql.Date datee) { Return (datee.toString); } Public static void main (String[] args) { Java.sql.Date day; Day = TypeChange.stringToDate (2003-11-3); String strday = TypeChange.dateToString (day); System.out.println (strday); } } The commonly used JAVA data type conversion function Although can be