Conversion between string, integer, and INT in Java Data Types

Conversion between string, integer, and INT in Java Data Types

 

These conversions often make me dizzy. I simply found an article, which is quite clear at first glance. By the way, the article comes from:
Http://blog.sina.com.cn/cnxiaotao

1. Integer Conversion to int

Integer I;
Int K = I. intvalue ();
That is, integer. intvalue ();

 

2.int to integer

Int I;

Integer it = new INTEGER (I );

 

3. Convert string to int

String STR = "10 "; 
IntegerIt = newInterger (STR ); 

IntI = it. intvalue (); 

That is, intI = integer. intvalue (string );

 

4.int to string

Int I;

(1) string S = string. valueof (I );

(2) string S = ingeger. tostring (I );

(3) string S = "" + I;

 

5. Convert string to integer

String STR = "10"

Integer it = integer. valueof (STR );

 

6. Convert integer to string

Integer it;

String Str= It. tostring ();

 

7. Convert string to bigdecimal

Bigdecimal BD = new bigdecimal (STR );

 

8. Date

Calendar calendar = calendar. getinstance ();
Int year = calendar. Get (calendar. year );
Int month = calendar. Get (calendar. month) + 1;
Int day = calendar. Get (calendar. date );

// Obtain the date string of today
String today = java. Text. dateformat. getdateinstance (). Format (New java. util. Date ());
// Obtain the date of today
New java. SQL. Date (system. currenttimemillis ());