Common type conversions in Java

1. Converting a string to an integer (String--->int)
Method One:
(1) int i = Integer.parseint (String s);

which (1) is actually what we often use to convert s to 10, in fact, the default is to call the int i =integer.parseint ("123",ten);  

(2) i = Integer.parseint (String s,int radix);

The range of radix is between 2~ 36 and out of range throws an exception. The length of s can not exceed 7, otherwise it will throw an exception.

Method Two:

　　int i = integer.valueof (my_str). Intvalue ();

Note: The string is converted to Double, Float, and Long in the same way as above.

2. How to convert integers to strings (int--->string)

(1) String s = string.valueof (i);
(2) String s = integer.tostring (i);
(3) String s = "" + I;
Note: Double, Float, and Long turn into a string similar to the previous method.

Common type conversions in Java