An introduction to the process of program design and analysis using the Java programming language for students with some prior programming experience (functions, loops, and arrays) in a language other than Java. Topics to be covered include an overview of fundamental programming concepts using Java as well as object-oriented programming techniques, data aggregates, data structures (e.g., linked lists, stacks, queues, trees, and graphs), and an introduction to the analysis of algorithms that operate on those data structures. This course, along with 21-127, serves as a prerequisite for 15-211. NOTE: students who receive a grade of C or less in 15-111 should discuss whether they are adequately prepared for 15-211 with their academic advisor.