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Java Java Data Structures Exploring the Java Collection Framework Maps

Thomas Williams
Thomas Williams
9,301 Points

KeySet Error in the java-repl

This code when typed into the java-repl:

'''java> Set<String> allAcronyms = acronyms.KeySet();'''

is producing this error:

'''ERROR: cannot find symbol
symbol: method KeySet()
location: variable acronyms of type java.util.Map<java.lang.String,java.lang.String>
acronyms.KeySet();; '''

Even though it is the same as that typed in the tutorial video. Any explanations??

1 Answer


It looks like you're trying to call the keySet() method, so double check your capitalization and it should start working.

Thomas Williams
Thomas Williams
9,301 Points

Thank you, I thought it looked like a capital, my mistake! That has fixed the problem.

You're welcome. Good luck with Java.