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Simple Java Integer Example

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  1. /*
  2.   Java Integer Example
  3.   This example shows how object of Integer can be declared and used.
  4.   Integer is a wrapper class provided to wrap int primitive value. It has a single
  5.   field of type int.
  6. */
  7.  
  8. public class IntegerExample {
  9.  
  10.   public static void main(String[] args) {
  11.     //create an Integer object using one the below given constructors
  12.     //1. Create an Integer object from int
  13.     Integer intObj1 = new Integer(10);
  14.    
  15.     /*
  16.     2. Create and Integer object from String. Please note that this method can
  17.     throw NumberFormatException if string doesnt contain parsable number.
  18.     */
  19.     Integer intObj2 = new Integer("10");
  20.    
  21.     //print value of Integer objects
  22.     System.out.println(intObj1);
  23.     System.out.println(intObj2);
  24.   }
  25. }
  26.  
  27.  
  28. /*
  29. Output of the program would be
  30. 10
  31. 10
  32. */