Program to use expression with Wrapper classes in Java

//  Program to use expression with Wrapper classes.
class Wrapper5
{
public static void main(String args[ ]) 
{
 Integer iOb = 100;
 Double dOb = 123.45;
 dOb = dOb + iOb;
 System.out.println("dOb after expression: " + dOb);
}
}

Output:
dOb after expression: 223.45