Answer / guru

wrapper class used access the primitive data types as objects.
we cant store primitive data in arraylist,hashtable so we
using wrapper class used to store primitive data types as
objects,caz objects only can store in collections

Answer / vijayakumar chinnasamy

A class enclosed or Wrapped the primitive data type is
called wrapper class.

Number class is the super class for Wrapper class. subclass
of Number classes are Byte,Short,Intger,Long,Float,Double,
Character

primitive values Wrapper class

byte Byte
short Short
int Integer
long Long
float Float
char Character

Mostly the wrapper classes are used to pass the date thru
networks/serializable.

public class BatchTest { public static void main(String[] args) { Runtime run = Runtime.getRuntime(); try { Process p = run.exec("cmd start /c D:/test.bat"); System.out.println(p.exitValue()); } catch (Exception e) { e.printStackTrace(); } System.out.println("FINISHED"); } }

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