This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I am getting java.lang.NullPointerException in Address adr = myprovider.getAddress("52317702"); where myprovider is an instance of Provider inteface. 5231702 is the phone no. Please give a solution for this problem as my project gets struck here.