equals, hashCode and toString in Java

Java interview exercise on Records, classes & interfaces, difficulty 2 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.

Write class Money with a constructor Money(long cents, String currency), accessors cents() and currency(), equals and hashCode based on both fields (so a HashSet treats equal amounts as one), and toString rendering "12.34 USD" (two decimals, a space, the currency).

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 Records, classes & interfaces in Java

• A record that validates itself
• An interface with a default method
• A sealed expression tree
• An enum with behaviour
• The builder pattern

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