Data type conversion function in Java
1 How to convert a string string into an integer int?
A. There are two ways:
1). INT i = integer.parseint ([string]); or
I = integer.parseint ([String], [INT RADIX]);
2). INT i = integer.valueof (my_str) .intValue ();
Note: The string is transformed into Double, Float, and long.
2 How to convert integer int converted into a string string?
A. Have a variety of methods:
String s = String.Valueof (i);
2.) String s = integer.tostring (i);
3.) String s = "" i;
Note: Double, Float, long-converted to string is similar.
1 How to convert a string string into an integer int?
A. There are two ways:
1). INT i = integer.parseint ([string]); or
I = integer.parseint ([String], [INT RADIX]);
2). INT i = integer.valueof (my_str) .intValue ();
Note: The string is transformed into Double, Float, and long.
2 How to convert integer int converted into a string string?
A. Have a variety of methods:
String s = String.Valueof (i);
2.) String s = integer.tostring (i);
3.) String s = "" i;
Note: Double, Float, long-converted to string is similar.
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 PaSeint (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)
This is an example that is said to be a conversion of data in Java.
Package cn.com.lwkj.rts.Register;
Import java.sql.date;
Public class typechange {
Public typechange () {
}
// change the string type to the int typepublic static int stringtoint (String INTSTR)
{
Integer integer;
Integer = integer.valueof (INTST);
Return Integer.intValue ();
}
// Change int Type to the String Type
Public Static String INTSTOSTOSTOSTRING (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 DateTString (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);
}
}
