Mutual conversions between various types in Java

1. Conversion of data types between shaping and character type:

　　There are two ways to convert an int into char:

① is a Unicode encoding using char

Example: int num1 = 8;　

Char ch1 = (char) (NUM1 + 48);　

　two. Char converted to int type 　

  

(char is the base data type, character is its wrapper type.) )  

    int num2 = Integer.parseint (Ch2.tostring ()); /span>

② is a Unicode encoding using char  

  Example: char CH3 = ' 8 ';

int num3 = ch3-48;

2. Conversion between the base data type and the string:

convert an int to string　

①. converting integers to character type

String num = integer.tostring (int n);

②.long type conversion to character type 　

String num = long.tostring (Long n);　

③.short type conversion to character type 　

String num = short.tostring (short n);

④.float type conversion to character type

String num = float.tostring (Float n);

⑤.double type conversion to character type 　

String num = Double.tostring (Double N);

two. String converted to int

①. Convert to int

Int/integer num  =  Integer.parseInt ( String str); /span>

②. Convert to Long

Long/long num    =  Long.parselong (String str); /span>

③. Convert to Short type

Short/short num  =  Short.parseShort ( String str);

④. Convert to float type

Float/float num  =  float.parsefloat (String str); /span>

⑤. Convert to type double

Double/double num = double.parsedouble (String str);

Mutual conversions between various types in Java