Contests where Java code is allowed

Name
Lambda and LINQ - More Exercises
Objects and Simple Classes - Lab
Objects and Simple Classes - Exercises
Strings and Text Processing - Lab
Strings and Text Processing - Exercises
Regular Expressions (RegEx) - Lab
Strings and Text Processing - More Exercises
Regular Expressions (RegEx) - Exercises
Exam Preparation I - Taking a Sample Exam
Exam Preparation II - Taking a Sample Exam