Below code,
package AutoBoxing;
/*
* When a wrapper type is initialized do you get a new object created?
* Answer: It depends!!!!
* 1) If you use a constructor then a new instance will be created.
* 2) If you use boxing('Integer i = 127'), and the value being boxed is a
* boolean, byte, char in the range \u0000 to \u007f, int or short in the
* range -128 to 127 then there is a single object. Technical phrase is 'interned'
*/
public class Example2 {
public static void main(String[] args) {
Integer i = 127, j = 127;
Integer k = new Integer(127);
System.out.println(i == j); // unboxed values are compared
System.out.println(i == k); // memory addresses are compared
}
}
gives
true
false
as output.
true because objects are unboxed and values are compared(127 == 127).
false because memory addresses are compared.
Why unboxing is not done in second case? Because kis also of type wrapper class to primitive?
