This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Steve is right. You can change any working Java program to work without imports - you will just have to write out each class name with their package names as well. So instead of "Date date = new Date();" you would have to write "java.util.Date date = new java.util.Date();". In the end, import statements are only meant to make life easier for us programmers.