Java different type character conversion string/int/float/////

1.int & String

int i=5678; String s= "";

int->string:s=i+ ""; or s=string.valueof (i);

String->int:i=integer.parseint (s); or i=integer.valueof (s). Intvalue ();

2.String & Float

String s= ""; Float f=12.21;

string->float:f= float.valueof (s); f = new Float (s); f = float.parsefloat (s);

Float->string:s= f.tostring ();

Summary: Conversions between strings and other types

(1) Conversion of other types to strings

① the string conversion method of the Calling class: X.tostring ();

② Automatic conversion: x+ "";

③ method of using String: string.volueof (X);

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(2) string as a value, to other types of conversions

The ① is converted to the corresponding wrapper instance before the corresponding method is converted to another type.

For example, the character "32.1" converts the value of a double type to the format: New Float ("32.1"). Doublevalue (). can also be used: double.valueof ("32.1"). Doublevalue ()

② static Parsexxx method

String s = "1";

byte B = byte.parsebyte (s);

Short T = Short.parseshort (s);

int i = Integer.parseint (s);

Long L = Long.parselong (s);

Float f = float.parsefloat (s);

Double d = double.parsedouble (s);

③character getnumericvalue (char-ch) method

Java different type character conversion string/int/float/////