Strings in Java: interview exercises

Strings in Java: 6 test-checked interview exercises (Reverse the words, Is it a palindrome?), each beside a worked example, with tests as you go. Free.

1. Reverse the words
2. Is it a palindrome?
3. Character frequencies
4. Caesar cipher
5. Run-length encoding
6. Join a list in prose

Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.

More Java topics

• Collections
• Streams & lambdas
• Records, classes & interfaces
• Generics & Optional
• Exceptions & validation
• Algorithms & recursion
• Modern Java

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