Java之int和string类型转换详解

package shenmixiaozhu;
import java.sql.Date;
public class TypeChange {
   public TypeChange() {
   }
   //change the string type to the int type
   public static   int stringToInt(String intstr)
   {
     Integer integer;
     integer = Integer.valueOf(intstr);
     return integer.intValue();
   }
   //change int type to the string type
   public static String intToString(int value)
   {
     Integer integer = new Integer(value);
     return integer.toString();
   }
   //change the string type to the float type
   public static   float stringToFloat(String floatstr)
   {
     Float floatee;
     floatee = Float.valueOf(floatstr);
     return floatee.floatValue();
   }
   //change the float type to the string type
   public static String floatToString(float value)
   {
     Float floatee = new Float(value);
     return floatee.toString();
   }
   //change the string type to the sqlDate type
   public static java.sql.Date stringToDate(String dateStr)
   {
     return   java.sql.Date.valueOf(dateStr);
   }
   //change the sqlDate type to the string type
   public static String dateToString(java.sql.Date datee)
   {
     return datee.toString();
   }

   public static void main(String[] args)
   {
     java.sql.Date day ;
     day = TypeChange.stringToDate("2003-11-3");
     String strday = TypeChange.dateToString(day);
     System.out.println(strday);
   }
}