integer to String :
int i = 42;
String str =
Integer.toString(i);
or
String str = "" + i
double to
String :
String str = Double.toString(i);
long to String
:
String str = Long.toString(l);
float to String :
String
str = Float.toString(f);
String to integer :
str =
"25";
int i = Integer.valueOf(str).intValue();
or
int i =
Integer.parseInt(str);
String to double :
double d =
Double.valueOf(str).doubleValue();
String to long :
long l =
Long.valueOf(str).longValue();
or
long l =
Long.parseLong(str);
String to float :
float f =
Float.valueOf(str).floatValue();
decimal to binary :
int i =
42;
String binstr = Integer.toBinaryString(i);
decimal to
hexadecimal :
int i = 42;
String hexstr =
Integer.toString(i, 16);
or
String hexstr =
Integer.toHexString(i);
hexadecimal (String) to integer :
int i
= Integer.valueOf("B8DA3", 16).intValue();
or
int i =
Integer.parseInt("B8DA3", 16);
ASCII code to i = 64;
String
aChar = new Character((char)i).toString();
integer to ASCII code
c = ‘A‘;
int i = (int) c; // i will have the
value 65 decimal
To extract Ascii codes from a test =
"ABCD";
for ( int i = 0; i < test.length(); ++i )
{
char c = test.charAt( i );
int i = (int)
c;
System.out.println(i);
}
integer to boolean :
b =
(i != 0);
boolean to =
note :
To catch illegal
number conversion, try using the try/catch mechanism.
try{
i
= Integer.parseInt(aString);
}
catch(NumberFormatException
e)
{
}
java中String类型转换方法,布布扣,bubuko.com
原文地址：http://www.cnblogs.com/sprinng/p/3737585.html
