Autobox3.java

package chapter12;

//Autoboxing/unboxing occurs inside expressions

public class Autobox3 {
    public static void main(String[] args) {
        Integer iOb, iOb2;
        int i;

        iOb = 100;
        System.out.println("Original value of iOb: " + iOb);

        //The following automatically unboxes iOb,
        //performs the increments and then reboxes
        //the result back into iOb
        ++iOb;
        System.out.println("After ++iOb " + iOb);

        //Here iOb is unboxed , the expression is evaluated
        //and the result is reboxed and assigned to iOb2
        iOb2 = iOb + (iOb / 3);
        System.out.println("iOb2 after expression: " + iOb2);

        //The same expression is evaluated ,but the result is not reboxed
        i = iOb + (iOb / 3);
        System.out.println("i after expression " + i);
    }
}