Java Type Conversion Summary

1. String to int

int i = integer.valueof (my_str). Intvalue (); int i = integer.parseint (str);

2. String to Integer

Integer integer = integer.valueof (str);

3, int turn String

1.) String s = string.valueof (i); 2.) String s =3""

4, int turn to Integer

New Integer (i);

5, Integer turn String

Integer integer=string

6, Integer to int

int num=integer.intvalue ();

7, String turn Char

Char " 123 ". ToCharArray ();

8. Char to String

String s=ca.tostring ();      // any type can be converted to a string type with ToString ()

9. Date

//DateCalendar calendar=calendar.getinstance ();intYear=calendar.Get(calendar.year);intMonth=calendar.Get(Calendar.month) +1;intDay=calendar.Get(calendar.date);//get today's date stringString today=java.text.dateformat.getdateinstance (). Format (Newjava.util.Date ());//get today's dateNewJava.sql.Date (System.currenttimemillis ());

10. Java Data type conversion:

import java.sql.Date; Public classTypechange { PublicTypechange () {}//Change the string type to the int type     Public Static intstringtoint (String intstr) {integer integer; Integer=integer.valueof (INTSTR); return integer.intvalue (); }    //Change int type to the string type     Public StaticString inttostring (intvalue) {Integer integer=NewInteger (value); return integer.tostring (); }    //Change the string type to the float type     Public Static floatstringtofloat (String floatstr) {Float floatee; Floatee= float.valueof (floatstr); return floatee.floatvalue (); }    //Change the float type to the string type     Public StaticString floattostring (floatvalue) {Float Floatee=NewFloat (value); returnfloatee.tostring (); }    //Change the string type to the Sqldate type     Public StaticJava.sql.Date stringtodate (String datestr)//convert into Time    {      return java.sql.Date.valueOf (datestr); }    //Change the sqldate type to the string type     Public StaticString datetostring (java.sql.Date datee) {returndatee.tostring (); }     Public Static voidMain (string[] args) {Java.sql.Date day; Day= Typechange.stringtodate ("2003-11-3"); String Strday=typechange.datetostring (day); System. out. println (Strday); }}

Java Type Conversion Summary