Android common data type (String, int, float, double,) conversion

Android common data type (String, int, float, double, long) conversion

Because often used to change the type of equipment, so tidy, easy to find:

A, String turn int, float, double, long.

int i = Integer.parseInt(str) 或者 int i = Integer.valueOf(str).intValue();

float f = Float.parseFloat(str) 或者 float f = Float.valueOf(str).floatValue();

double d = Double.parseDouble(str) 或者 double d = Double.valueOf(str).doubleValue();

long l = Long.parseLong(str) 或者 long l = Long.valueOf(str).longValue();

byte b = Byte.parseByte (str);

short t = Short.parseShort(str);

Two, int turn String.

String s = String.valueOf (value); // wherein the value is any one of a digital type
String String.valueOf = S (I);
String Integer.toString = S (I);
String S = "" + value; // wherein the value is any type of a digital

Note: Double, Float, Long transfer method similar to a string of

Three, float switch int, String.

float f= 0.0f;

int b = (int) f; // with (int) cast integral B
int = B Math.round (F); // use round mode converter integer

String s= String.valueOf(f);
String s= f + “”;
String s= f.toString();