This tutorial covers the challenges and solutions for developing distributed software systems. All considered elements of the technology are illustrated by examples, after reading which, readers will get a complete understanding of the methods for developing distributed applications on the J2EE platform. The tutorial describes a number of popular ways to develop distributed applications using Java technology (API java.net, RMI, CORBA, Web Services, JMS). All considered technologies and software tools are either included in the standard package of the J2SE, or can be freely downloaded from the websites of development companies.